Aaron Pierce
(Michigan)
27/07/2009, 11:30
Michael Martens
(Fermilab)
27/07/2009, 14:00
Accelerator Physics
This is a talk on the challenges of beamlines and targeting for neutrino production using multi-megawatt beamlines. Discussed are lessons from NuMI operations at Fermilab and concerns related to future and proposed beamlines such as NOvA, CNGS, JPARC, and LBNE.
Elizabeth Hays
(NASA/GSFC)
27/07/2009, 14:00
Particle Astrophysics and Cosmology
The Fermi Gamma-ray Space Telescope has been surveying the gamma-ray sky since August 2008. The Large Area Telescope detects gamma rays over a wide field of view, ~2.4 sr, across a broad energy range, from ~20 MeV to above 300 GeV, and with excellent angular resolution, 68% containment of better than 1 deg at 1 GeV. The capabilities of the LAT have opened a new window for exploring high energy...
Alakabha Datta
(University of Mississippi)
27/07/2009, 14:00
CP-violation
I will describe several CP violating signals in B decays like direct CP violation, mixing induced CP violation and Triple Product Asymmetry. I will discuss CP violating measurements involving b-> s transitions. I will particularly focus on measurements made on penguin decays like B-> phi K_s, B-> K pi and on B_s mixing.
Mary Bishai
(Brookhaven National Laboratory)
27/07/2009, 14:00
Neutrino Physics
Man-made sources of neutrinos from nuclear reactors and particle
accelerators provide a well understood source of neutrinos. Reactors
are a powerful source of anti-electron neutrinos with energies in the
0.1 - 10 MeV range and a flux of order 10^20 neutrinos/GWth. High
intensity proton accelerators produce high purity muon neutrino and
anti-muon neutrino beams with energies in the range...
Andrew Haas
(SLAC)
27/07/2009, 14:00
Beyond the Standard Model
Large datasets from the D0 and CDF experiments at the Fermilab Tevatron have been used to search for evidence of beyond-SM physics. Direct searches for new particles and interactions resulting from specific models such as SUSY and Large Extra Dimensions will be discussed, as well as "model independent" searches.
Dr
Walker Devin
(University of California - Berkeley)
27/07/2009, 14:00
Top Quark Physics
The LHC at design luminosity will generate 80 million top quark pairs which can be suitably tagged by the experimental collaborations. Because of the close connection between the electroweak symmetry breaking scale and their mass, these top quarks can be used as a probe of new physics at the LHC. In this talk, we review what new physics can be potentially discovered with top quark pairs...
Dr
Radja Boughezal
(Univ. of Zurich)
27/07/2009, 14:00
Higgs Physics
We review the most recent theoretical developments for the Standard Model
Higgs production in Hadron Colliders.
Ken Bloom
(University of Nebraska-Lincoln)
27/07/2009, 14:00
Computing in HEP
Each LHC experiment will produce datasets with sizes of order one petabyte
per year. All of this data must be stored, processed, transferred, simulated
and analyzed, which requires a computing system of a larger scale than ever
mounted for any particle physics experiment, and possibly for any enterprise
in the world. I will discuss how CMS has chosen to address these challenges,...
Bing An Li
(University of Kentucky)
27/07/2009, 14:00
Heavy Flavor Physics [bottom, charm, tau]
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\begin{document}
\title{$\Upsilon(1S)\rightarrow \gamma( \eta', \eta, f_2(1270))$ decays }
\author{Bing An Li\\Department of Physics, Univ. of Kentucky, Lexington, USA}
%KY, 40506, USA}
\maketitle
In this talk the...
Turgun Nigmanov
(University of Pittsburgh)
27/07/2009, 14:24
Heavy Flavor Physics [bottom, charm, tau]
The Bc meson, composed of two heavy quarks of distinct flavor, provides a
very interesting system to study. CDF experiment is the leading
contributor to the experimental studies of Bc mesons, with measurements of
both production and decay properties. We report amongst other results the
measurement of production cross section and lifetime, using semileptonic Bc
-> J/psi mu X decays.
Brian Humensky
(University of Chicago)
27/07/2009, 14:25
Particle Astrophysics and Cosmology
The Very Energetic Radiation Imaging Telescope Array System (VERITAS) provides unprecedented flux sensitivity in the energy regime 100 GeV - 30 TeV to the northern hemisphere gamma-ray sky. The array consists of four 12 m class imaging atmospheric Cherenkov telescopes and is located at Whipple Observatory in southern Arizona. VERITAS addresses a wide range of astrophysical phenomena including...
Dr
Linda Coney
(UC Riverside)
27/07/2009, 14:30
Accelerator Physics
Muon ionization cooling provides the only practical solution to prepare high brilliance beams necessary for a neutrino factory or muon colliders.
The muon ionization cooling experiment (MICE)* is under development at the Rutherford Appleton Laboratory (UK). It comprises a dedicated beam line to generate a range of input emittance and momentum, with time-of-flight and Cherenkov detectors to...
Roger Wendell
(Duke University)
27/07/2009, 14:30
Neutrino Physics
In contrast to the predictions of the Standard Model of particle physics, experimental data now indicate that neutrinos are massive and undergo flavor oscillations. Indeed, the oscillations of $\nu_{e}$ to $\nu_{x}$ within the sun are now the favored explanation for the discrepancy between the Standard Solar Model's electron neutrino flux prediction and the flux measurements of the solar...
Alden Stradling
(UT Arlington)
27/07/2009, 14:30
Computing in HEP
In anticipation of the calibration, performance, and physics activities that will be performed on the LHC first data, the ATLAS experiment is continuously refining elements of its Computing and Analysis Models. We will present an overview of some of recent developments in ATLAS computing, including the current resource estimates for Tier 1 and 2s, issues related to the establishment of Tier...
Mr
Himansu Sahoo
(University of Hawaii)
27/07/2009, 14:30
CP-violation
We report measurements of time-dependent $CP$-violation parameters in radiative modes where a $B^0$ meson decays to $\phi K_S^0 \gamma$, $\omega K_S^0 \gamma$,
$K_S^0 \rho^0 \gamma$ and $K_S^0 \pi^0 \gamma$ final states. These results are based on a
large data sample collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB
energy-asymmetric $e^+e^-$ collider and are...
Mr
Zaki Shalhout
(Wayne State University)
27/07/2009, 14:35
Higgs Physics
We present a search for associated production of a standard model (SM) Higgs boson and a Z boson where the Z decays to two leptons and the Higgs decays into a pair of b quarks, p-pbar->ZH->llbb. We explore techniques not currently used in other Higgs searches at CDF. We utilize SM matrix elements to calculate event probabilities rather than utilizing them as a discriminant variable. Using...
Mr
Rob Forrest
(UC Davis)
27/07/2009, 14:40
Beyond the Standard Model
The production of chargino-neutralino pairs and their subsequent leptonic decays is one of the most promising supersymmetry (SUSY) signatures at the Tevatron proton-antiproton collider. We present here the most recent results on the search for the three-lepton and missing-transverse-energy SUSY signature using data collected with the CDF II detector. The results are interpreted within the...
Mr
Leandro Almeida
(Stony Brook University)
27/07/2009, 14:40
Top Quark Physics
Study of high-pt jets from QCD and from highly-boosted massive particles such as tops, W, Z and Higgs, and argue that infrared-safe observables can help reduce QCD backgrounds. Jets from QCD are characterized by different patterns of energy flow compared to the products of highly-boosted heavy particle decays, and we employ a variety of jet shapes, observables restricted to energy flow within...
Dr
Francesco Dettori
(Università degli Studi di Cagliari / INFN)
27/07/2009, 14:48
Heavy Flavor Physics [bottom, charm, tau]
We report on the perspective measurements of inclusive particle production in high-energy pp collisions with data to be collected by the LHCb experiment at CERN's LHC. These include V0 and D meson production studies, which can be based on a minimum bias sample, as well as charmonia production studies, which need a muon-triggered samples. Using reconstructed J/psi -> mu+mu- decays, both the...
Rupak Dutta
(University of Kentucky)
27/07/2009, 14:50
CP-violation
CKM mechanism of a single CP-violating phase has been confirmed by
various $B$ decay data over the decade. Yet, the existence of new
physics effects can not be ruled out.
In this context,
we consider the branching ratios and CP asymmetries in two theoretically
clean modes, namely in $B\to f_0(980) K_S$ and $B \to \phi K_S$ decays,
to the end of determining the deviation of time dependent...
corbin covault
(Case Western Reserve University)
27/07/2009, 14:50
Particle Astrophysics and Cosmology
The Pierre Auger Observatory is the world's largest detector for the highest energy cosmic rays. The astrophysical origins of these particles have remained a persistent mystery for decades. However, recent results from Auger indicate that we may be on the threshold of a new understanding. The Pierre Auger Observatory, in Malargue, Argentina, has been operating since 2004. We describe the...
Gavril Giurgiu
(Johns Hopkins)
27/07/2009, 14:55
Top Quark Physics
High mass resonance decaying into ttbar pairs appear in many extensions of the Standard Model. The top quarks from these decays have high transverse momentum and their decay products are typically bunched together due to the boost into the lab frame. As a result the standard techniques for reconstructing ttbar events begin to fail. In this talk we will discuss the prospects for detecting...
Mr
Alexander Sood
(Rutgers, The State University of New Jersey)
27/07/2009, 15:00
Beyond the Standard Model
Using supersymmetry search with trileptons as an example, we address the problem of discerning
new physics when it manifests itself in multiple channels simultaneously with several models vying
to accommodate the findings. This is best achieved by presenting experimental results in a model-
independent fashion, but suitably parametrized to allow for their interpretation in most models....
Dr
Darren Price
(Indiana University)
27/07/2009, 15:00
Higgs Physics
We present a search for the Standard Model Higgs boson produced in association with a W boson in p-pbar collisions at a center-of-mass energy of sqrt(s) = 1.96 TeV. The search is performed in the WH->lnubb channel using the latest amount of data collected by the CDF detector at the Fermilab Tevatron. An artificial neural network is employed to improve the separation between signal and...
Byeongsu Yang
(Seoul National University)
27/07/2009, 15:00
Neutrino Physics
The full Super-Kamiokande-III data-taking period, which ran from August of 2006 through August of 2008, yielded 298 live days worth of solar neutrino data with a lower total energy threshold of 4.5 MeV. During this period we made many improvements to the experiment's hardware and software, with particular emphasis on its water purification system and Monte Carlo simulations. As a result of...
Dr
Dazhang Huang
(Illinois Institute of Technology)
27/07/2009, 15:00
Accelerator Physics
In the process of ionization cooling, as a charged particle passes through an absorber, it induces a wake field by polarizing the absorber medium. If the beam density is sufficiently high (as may be the case in certain aggressive cooling approaches), this could result in beam-intensity-dependent effects, which are not taken into account in past and current studies. To understand this effect...
Dr
Burt Holzman
(CMS)
27/07/2009, 15:00
Computing in HEP
The Open Science Grid (OSG) enables collaborative science by providing a national cyber-infrastructure of distributed computing and storage resources. The goal of the OSG is to transform processing and data intensive science through a cross-domain, self-managed, nationally distributed cyber-infrastructure that brings together campus and community resources. The High Energy Physics community...
Sudhir Gupta
(Iowa State)
27/07/2009, 15:10
Top Quark Physics
We study the T odd correlations induced by CP violating anomalous top quark couplings at both production and decay level in the process gg --> t t_bar --> (b mu+ nu_mu) (b_bar mu- nu_mu_bar). We consider several counting asymmetries at the parton level and find the ones with the most sensitivity to each of these anomalous couplings at the LHC.
Dr
Enrico Lunghi
(Indiana University)
27/07/2009, 15:10
CP-violation
We consider several hints for new physics involving CP-asymmetries in B-decays and interpret them in terms of generic contributions to effective Wilson coefficients. The effects we focus on are: the differences in the fitted value of sin(2 beta) versus the ones directly measured via the time dependent CP asymmetries in B -> J/psi K or via B -> (phi,eta') K; the difference between the direct CP...
Prof.
Klaus HONSCHEID
(Ohio State University)
27/07/2009, 15:12
Heavy Flavor Physics [bottom, charm, tau]
We present preliminary results for branching fraction measurements of the
decays D0 --> V eta where V is a phi, omega or K*. We use a high statistics
data sample collected with the BaBar detector at the PEP-II asymmetric
e+ e- collider at SLAC.
Prof.
Richard Hughes
(The Ohio State University and The Fermi LAT Collaboration)
27/07/2009, 15:15
Particle Astrophysics and Cosmology
Designed as a high-sensitivity gamma-ray observatory, the Fermi Large Area Telescope (LAT) can also identify high-energy cosmic ray electrons and protons with angular resolution of better than one degree above 50 GeV. The statistics of such samples are quite large, with several million identified protons and electrons in 10 months of data. We discuss the prospects for measuring anisotropies...
Jennifer Raaf
(Boston University)
27/07/2009, 15:20
Neutrino Physics
We present recent results from analyses of atmospheric neutrino data using the Super-Kamiokande water Cherenkov detector, which has a fiducial volume of 22,500 tons of ultra-pure water. Data from three major running periods of SK are used in the analyses.
Mr
Eunsin Lee
(Texas A&M University)
27/07/2009, 15:20
Beyond the Standard Model
Models of supersymmetry predict new heavy, neutral particles, known as a
neutralino, that can decay to a photon and the lightest supersymmetric
particle, the gravitino. We present a search for these particles in proton
anti-proton collisions at sqrt{s}=1.96 TeV at the Collider Detector at
Fermilab. After years of data taking we find no evidence for this process
and set the...
Mr
David Cox
(University of California, Davis)
27/07/2009, 15:25
Top Quark Physics
In the 15 years since the discovery of top at the Tevatron the data available has reached the point where we can perform in depth examinations of the top quark event sample for evidence of physics beyond the Standard Model. We present a search for a massive quark (t') decaying to Wq and thus mimicking the top quark decay signature. We use the reconstructed mass of the t' quark and the scalar...
Dr
Bodhitha Jayatilaka
(Duke University)
27/07/2009, 15:25
Higgs Physics
We present a search for the Standard Model Higgs boson produced in association with a Z or a W boson in p-pbar collisions at a center-of-mass energy of sqrt(s) = 1.96 TeV. The search is made using the latest amount of data collected by the CDF detector at the Fermilab Tevatron. We consider the scenario where the Higgs boson decays into a b-bbar pair and either the Z decays into neutrinos or...
Dr
Shawn McKee
(University of Michigan)
27/07/2009, 15:30
Computing in HEP
Large-scale computing in ATLAS is based on a grid-linked system of tiered computing centers. The ATLAS Great Lakes Tier-2 came online in Sept., 2006 and now is commissioning with full capacity to provide significant computing power and services to the USATLAS community. Our Tier-2 Center also hosts the Michigan Muon Calibration Center which is responsible for daily calibrations of the ATLAS...
Amarjit Soni
(BNL)
27/07/2009, 15:30
CP-violation
“ B-CP anomalies, “4th” generation and the LHC
Abstract Although the CKM-paradigm works approximately to O(20%), there are by now several indications that suggest the need for beyond the Standard Model CP-odd phase(s). The value of sin 2β measured via the goldplated (tree) mode, B → ψK s is smaller than the value deduced by using improved lattice matrix elements. The value of sin 2β...
Mary Convery
(Fermilab)
27/07/2009, 15:30
Accelerator Physics
We present the strategy which has been used recently to optimize
integrated luminosity at the Fermilab Tevatron proton-antiproton
collider. We use a relatively simple model where we keep the proton
intensity fixed, use parameters from fits to the luminosity decay of
recent stores as a function of initial antiproton intensity (stash
size), and vary the stash size to optimize the integrated...
Devin Harper
(University of Michigan)
27/07/2009, 15:40
Beyond the Standard Model
We have studied the sensitivity of the ATLAS detector for supersymmetric neutralino signals in the Zphoton + transverce missing energy (MET) and ZZ + MET final states in the Gauge Mediation Supersymmetry Breaking (GMSB) model in which the Higgsino-like neutralino is the next-to-lightest supersymmetric particle (NLSP). The neutralino could be pair produced either directly or indirectly and...
Roberta Volpe
(INFN, Sezione di Perugia-Universita & INFN, Perugia-Unknown)
27/07/2009, 15:40
Mr
Patrick Smith
(The Ohio State University and The Fermi LAT Collaboration)
27/07/2009, 15:40
Particle Astrophysics and Cosmology
The Fermi Gamma-Ray Space Telescope was launched in June 2008 and the onboard Large Area Telescope (LAT) has been collecting data since August of that same year. The LAT is currently being used to study a wide range of science topics in high-energy astrophysics, one of which is the study of high-energy cosmic rays. The LAT has recently demonstrated its ability to measure cosmic-ray electrons,...
Ryan Patterson
(California Institute of Technology)
27/07/2009, 15:40
Neutrino Physics
MINOS is a long baseline neutrino oscillation experiment situated along Fermilab's high-intensity NuMI neutrino beam. The beam traverses two large iron-scintillator tracking calorimeters: the 0.98 kton near detector located 1 km from the production target and the 5.4 kton far detector sited 735 km downstream in the Soudan mine in northern Minnesota. By looking for an excess of candidate...
Ms
Dana LINDEMANN
(McGill University)
27/07/2009, 16:30
Heavy Flavor Physics [bottom, charm, tau]
We present the search for the radiative leptonic decay modes
B+ -> e nu gamma and B+ -> mu nu gamma using data collected by the
BaBar detector at the PEP-II B-factory. In this analysis, we fully
reconstruct the hadronic decay of one of the B mesons from the
Upsilon(4S) --> BBbar and then search for evidence of the
B+ --> l+ nu gamma decay in the remaining particles...
Alexander Shemyakin
(Fermilab)
27/07/2009, 16:30
Accelerator Physics
A permanent – magnet, 3.3 km 8 GeV Recycler ring is used to accumulate antiprotons and prepare them for Tevatron shots. Two cooling systems, stochastic and electron, allows increasing of the antiproton phase density by a factor of ~ 50 and storing up to 51012 antiprotons with the storage efficiency above 90%. The paper will describe the status of the Recycler ring and its operation.
Dr
Subhendu Chakrabarty
(SUNY Stony Brook)
27/07/2009, 16:30
Higgs Physics
We present a search for the standard model Higgs boson in events with two tau leptons in p-pbar collisions at a center-of-mass energy of sqrt(s) = 1.96 TeV. The search is made using the latest amount of data collected by the CDF detector at the Fermilab Tevatron. We search in the final state of two tau leptons plus two jets. This final state is sensitive to WH and ZH where one boson decays...
Pedro Ochoa
(Caltech)
27/07/2009, 16:30
Neutrino Physics
The reach of the search for electron-neutrino appearance in the MINOS far detector, a process which would manifest a non-zero value of the $\theta_{13}$ mixing angle, depends primarily on the ability to separate the signal from the backgrounds. MINOS is using two different approaches for event classification. One selector is an artificial neural network, which relies on topological variables...
Prof.
Stephen Martin
(Northern Illinois University)
27/07/2009, 16:30
Beyond the Standard Model
I will review some of the recent developments in phenomenological aspects of supersymmetric model building. The discussion will
be organized around issues and models that are motivated by the supersymmetric little hierarchy problem and by constraints
on and searches for dark matter.
Sasha Vanyashin
(Argonne National Laboratory)
27/07/2009, 16:30
Computing in HEP
ATLAS event data processing requires access to non-event data (detector conditions, calibrations, etc.) stored in relational databases. The database-resident data are critical for the event data reconstruction processing steps and are often required for user analysis. A main focus of ATLAS database operations is on the worldwide distribution of the Conditions DB data, which are necessary for...
Prof.
Klaus Honscheid
(Ohio State University)
27/07/2009, 16:30
Particle Astrophysics and Cosmology
The discovery that the universe is accelerating, not slowing down from the mass it contains, is the surprise that sets the initial research program of 21st Century cosmology. The Dark Energy Survey is a next generation sky survey aimed directly at understanding this mystery. We will build an extremely red sensitive 500 Megapixel camera, a 1 meter diameter, 2.2 degree field of view prime focus...
Dr
Julia (Jessie) Shelton
(Rutgers University)
27/07/2009, 16:30
Top Quark Physics
The top quark's uniquely large Yukawa coupling hints at a special connection between the top quark and the physics responsible for electroweak symmetry breaking. If new physics at the LHC is related to the electroweak hierarchy, it will typically lead to observable polarization signals for top quarks produced in association with new physics. Signals are observable for both events with and...
Dr
Alexei Varganov
(the University o Michigan)
27/07/2009, 16:45
Top Quark Physics
According to standard model top quarks decay weakly before any hadronization processes take effect.
This enables top quark spin information to be transmitted to the top quark decay products.
We discuss the measurement method for various decay channels and report first result for spin correlation in top pairs using dilepton events.
Amir Farbin
(University of Texas, Arlington)
27/07/2009, 16:50
Computing in HEP
Although in the early 90s, High Energy Physics (HEP) helped to drive the computing industry by establishing the HTTP protocol and the first web-servers, the long time-scales for planning and building modern HEP experiments has resulted in a generally slow adoption by HEP of emerging computing technologies which rapidly become commonplace in business and other scientific fields. We will review...
Sanjay Swain
(Stanford University)
27/07/2009, 16:50
Neutrino Physics
The MINOS experiment at Fermilab uses two functionally identical detectors,
the near detector at Fermilab and the far detector at Soudan Mine in
Minnesota, to search for the muon-neutrino to electron-neutrino
oscillations and potentially constrain the last unknown mixing angle in the
3-flavor lepton mixing matrix. In order to estimate the backgrounds in the far
detector, where the...
Mr
Manuel FRANCO SEVILLA
(SLAC)
27/07/2009, 16:54
Heavy Flavor Physics [bottom, charm, tau]
We report a measurement of the branching fractions of B -> D** l nu decays
based on 417 fb-1 of data collected at the Upsilon (4S) resonance with
the BABAR detector at the PEP-II e+e- storage rings. Events are
selected by fully reconstructing one of the B mesons in a hadronic decay
mode. A fit to the invariant mass differences m(D(*)pi) - m(D(*)) is
performed to extract the signal yields...
Mr
Xuebing Bu
(Univ of Science and Technology of China, Hefei)
27/07/2009, 16:55
Higgs Physics
We present a search for a fermiophobic Higgs decaying to two photons. In the standard model the Higgs boson decays predominately to two bottom quarks for low Higgs masses, and the branching ratio for decays to two photons is on the order of 0.2%. However, in scenarios, where the Higgs boson only couples with other bosons,
H to two photon decays are much more significant. Since the Higgs in...
Prof.
Ian Shipsey
(Purdue University)
27/07/2009, 16:55
Particle Astrophysics and Cosmology
Recent technological advances have made it possible to carry out deep optical surveys of a large fraction of the visible sky. Such surveys enable a diverse array of astronomical investigations including: the search for small moving objects in the solar system, studies of the assembly history of the Milky Way, the establishment of tight constraints on models of dark energy using a variety of...
Mr
Glenn Strycker
(University of Michigan)
27/07/2009, 17:00
Top Quark Physics
We measure a forward-backward charge asymmetry in the rapidities of top quarks produced in $p\bar p$ collisions at $\sqrt s$=1.96 TeV. The $t\bar t$ kinematics are reconstructed in ~800 lepton+jets events collected in a 3 $fb^{-1}$ exposure with CDF detector at Fermilab. We present two independent techniques -- a model independent unfold and a likelihood fit to a linear asymmetry in the...
Dr
Jean-Luc Vay
(Lawrence Berkeley National Laboratory)
27/07/2009, 17:00
Accelerator Physics
It was shown recently that it can be computationally advantageous to perform computer simulations in a Lorentz boosted frame for a certain class of relativistic systems such as: free electron laser, laser-plasma accelerator, and particle beams interacting with electron clouds [1], and reduction by orders of magnitude in computer simulation run times using methods based on first-principles...
Dr
Istvan Danko
(University of Pittsburgh)
27/07/2009, 17:10
Neutrino Physics
The MINOS long-baseline neutrino experiment has confirmed the disappearance of accelerator muon-neutrinos and measured the $|\Delta m^2_{23}|$ mass splitting with the best precision to date. The MINOS experiment is now set to measure the disappearance of muon anti-neutrinos and their oscillation parameters, which can be used to test CPT violation and other exotic models. The magnetic field of...
Todd Adams
(Department of Physics, B-159 - Florida State University)
27/07/2009, 17:10
Beyond the Standard Model
Supersymmetry predicts the existence of charginos and neutralinos, the
partners of the gauge and Higgs bosons, which can be produced in pairs at
the Tevatron. Charginos and neutralinos decay directly or in cascades into
charged leptons and the lightest supersymmetric particle (LSP). Assuming
R parity conservation the LSP (in this case the lightest neutralino) is stable.
Due to the small...
Dr
Monica Tecchio
(University of Michigan)
27/07/2009, 17:15
Top Quark Physics
CDF and D0 have recently reported measurements of the forward-backward asymmetry in top pair production in ppbar collisions at the Tevatron. We report here on a study of that asymmetry as a function of the invariant mass of the ttbar system. A simple unfold technique is used to propagate the laboratory measurement to the parton level simultaneously in the top quark rapidity and top-antitop...
Enrico FELTRESI
(INFN Padova)
27/07/2009, 17:18
Heavy Flavor Physics [bottom, charm, tau]
Semileptonic B decays to DXlnu (l = e or mu) are selected by
reconstructing D0l and D+l combinations from a sample of 230 million
Upsilon(4S) -> BB decays recorded with the BABAR detector at the PEP-II
e+e- collider at SLAC. A global fit to these samples in a 3-dimensional
space of kinematic variables is used to determine the branching
fractions B(B- -> D0 l nu) = (2.34 +/- 0.03 +/-...
Prof.
Mark Trodden
(University of Pennsylvania)
27/07/2009, 17:20
Particle Astrophysics and Cosmology
I consider couplings between the dark energy and dark matter sectors, and describe constraints arising from a combination of new instabilities, cosmological observations and the requirement of a weak coupling regime.
Dr
Rahmat Rahmat
(University of Mississippi)
27/07/2009, 17:20
Higgs Physics
A prospective analysis is presented on the observability of the Standard Model Higgs boson produced in the Vector Boson fusion and decaying into tau-tau pair with the tau-tau->lvv+tau-jet v final state. The estimates of the upper limit on the cross section times branching ratio for 1fb-1 for the Higgs boson mass interval 115-145 GeV/c2 are given.
Dr
Alexandre Sousa
(Harvard University)
27/07/2009, 17:30
Neutrino Physics
A search for disappearance of active neutrinos over a baseline of 735 km was conducted using the NuMI neutrino beam and the MINOS detectors. The data analyzed correspond to an exposure of 3.18x10^20 protons-on-target.
The data are fitted to neutrino oscillation models in which mixing with one sterile neutrino is assumed. A comparison of the neutral-current-like spectrum at the far detector...
Prof.
Daniel Kaplan
(Illinois Institute of Technology)
27/07/2009, 17:30
Accelerator Physics
Muon colliders and neutrino factories are attractive options for future facilities aimed at achieving the highest lepton-antilepton collision energies and precision measurements of parameters of the neutrino mixing matrix. The performance and cost of these depend sensitively on how well a beam of muons can be cooled. Recent progress in muon cooling design studies and prototype tests nourishes...
Sergey Uzunyan
(Northern llinois University)
27/07/2009, 17:30
Beyond the Standard Model
A search for squarks and gluinos has been performed on data from ppbar
collisions collected using the D0 detector at the Fermilab Tevatron. The
topology analyzed consists of jets with large missing transverse energy. The
search for squarks has also been performed in the topology of multijet
events accompanied by large missing transverse energy and at least one tau
lepton decaying...
Shabnam Jabeen
(Boston University-Unknown-Unknown)
27/07/2009, 17:30
Top Quark Physics
We present recent results related to the measurement of top quark production using ppbar collisions recorded with the D0 Detector at the Tevatron. The results are: Measurement of the Wtb coupling and of the W boson helicity (abstract 220), search for anomalous top quark couplings (228) and top spin correlations (not submitted as separate abstract)
Prof.
Sherwin Love
(Purdue University)
27/07/2009, 17:40
Particle Astrophysics and Cosmology
A minimal candidate for dark matter is provided by a single standard model singlet.
The quantum mechanical effects of this singlet are explored in a model where the Higgs boson has a large non-minimal coupling to the Ricci scalar and plays the role of the inflaton. Imposition of the slow roll inflation cosmological constraints restricts the allowed values of the Higgs boson mass, its...
Sudarshan PARAMESVARAN
(Royal Holloway, University of London)
27/07/2009, 17:42
Heavy Flavor Physics [bottom, charm, tau]
Hyunsu Lee
(University of Chicago)
27/07/2009, 17:50
Top Quark Physics
More than a decade after its discovery we are still trying to find out more about the nature of the top quark. The current statistics of the Tevatron allow us to make stringent tests. In this talk we will present state of the art measurements of top quark properties. By studying rates and distributions sensitive to the production and decay mechanisms of top quarks, we can search for...
Dr
Andrew Blechman
(University of Toronto)
27/07/2009, 17:50
Beyond the Standard Model
We present a version of Gauge Mediated Supersymmetry Breaking which preserves an R-symmetry - the gauginos are Dirac particles, the A-terms are zero, and there are four Higgs doublets. This offers an alternative way for gauginos to acquire mass in the supersymmetry-breaking models of Intriligator, Seiberg, and Shih. We investigate the possibility of using R-symmetric gauge mediation to realize...
Andrew Norman
(University of Virginia)
27/07/2009, 17:50
Neutrino Physics
The NOvA Experiment is a new accelerator based, long baseline, neutrino oscillation experiment which is beginning construction at Fermilab. NOvA is designed to probe with new precisions and sensitivities the theta_13 and theta_23 mixing angles of the PMNS matrix, while simultaneously having significant sensitivity to the CP violating phase delta and resolution of the neutrino mass hierarchy. ...
Dr
Mary Anne Cummings
(Muons, Inc.)
27/07/2009, 18:00
Accelerator Physics
MANX is a six-dimensional muon ionization cooling demonstration experiment based on the concept of a helical cooling channel in which a beam of muons loses energy in a continuous helium or hydrogen absorber while passing through a special superconducting magnet called a helical solenoid. The goals of the experiment include tests of the theory of the helical cooling channel and the helical...
Mr
Gagik Yeghiyan
(Wayne State University)
27/07/2009, 18:00
Particle Astrophysics and Cosmology
We examine $\Upsilon(1S)$ meson decay into a pair of
scalar Dark Matter particles and $\Upsilon(3S)$ meson decay into a
pair of scalar Dark Matter particles and a photon. To the lowest
order in perturbation theory, we perform model-independent analysis
and derive formulae for the branching ratios of these decays. We
confront our calculation results with the experimental data. We do
it...
Mr
TRUNG LE
(STONY BROOK UNIVERSITY)
27/07/2009, 18:10
Neutrino Physics
Neutrino oscillations were discovered in solar and atmospheric neutrinos experiments, and have been confirmed by experiments using neutrino beams from accelerators and nuclear reactors. It has been found that there are large mixing angles in the nue to numu and numu to nutau oscillations. The third mixing angle, which parameterizes the mixing between the first and the third family, is...
Angela Olinto
(University of Chicago)
28/07/2009, 09:00
Particle Astrophysics and Cosmology
Josh Frieman
(FNAL)
28/07/2009, 09:30
Particle Astrophysics and Cosmology
Rishi Sharma
(LANL)
28/07/2009, 14:00
Heavy Ion Physics/Hot and Dense QCD
We calculate the charm and beauty parton distribution functions and
fragmentation functions for open heavy mesons in vacuum using their operator
definitions in factorized perturbative QCD and find leading corrections that
arise from the structure of the final-state hadrons. Using thermal potentials
calculated on the lattice we demonstrate the existence of open heavy flavor
bound state...
Prof.
Kevin Pitts
(University of Illinois)
28/07/2009, 14:00
Education and Outreach in HEP
Elizabeth Clements
Angels & Demons: The real story behind the lecture nights
On May 15, Sony Pictures released Angels & Demons, a major motion picture based on Dan Brown’s best–selling novel. Starring Tom Hanks and directed by Ron Howard, the film focuses on an apparent plot to destroy the Vatican using antimatter made at the Large Hadron Collider and stolen from CERN. Through a series of...
Andrew York
(Unknown)
28/07/2009, 14:00
First Results from LHC
The Compact Muon Solenoid (CMS) is one of two general purpose experiments at
the Large Hadron Collider. The CMS experiment prides itself on an ambitious,
all silicon based, tracking system. After almost 20 years of design and
construction the CMS tracker detector has been installed and commissioned.
The tracker detector consists of ten layers of silicon microstrip detectors
while...
Dr
Alessandro Vicini
(Department of Physics, University of Milano)
28/07/2009, 14:00
Electroweak Physics [W/Z]
The production of a pair of high-transverse-momentum leptons plays a very important role at hadron colliders:
it allows the precise measurement of basic parameters of the Standard Model like the masses and decay widths of the W and Z bosons and the weak mixing angle; it provides stringent constraints on the parametrization of the proton parton density functions; it could provide a tool to...
Dr
Anze Zupanc
28/07/2009, 14:00
Hadron Spectroscopy
Using a large data sample recorded with the Belle detector
at the KEKB asymmetric energy e^+ e^- collider,
we report new results on charmonium-like states
produced in gamma-gamma collisions including studies of
final states with multiple
kaons. We also report updates on other new particles
and resonances recently observed in B decays by Belle.
Dr
Christopher Jackson
(Argonne National Laboratory)
28/07/2009, 14:00
Higgs Physics
I will review the status of the production of the Minimal Supersymmetric Standard Model (MSSM) Higgs bosons at hadron colliders. The talk will include a brief introduction to the Higgs sector of the MSSM and a summary of the state-of-the-art in the calculations of the radiatively-corrected cross sections. I will also review the current bounds on the MSSM parameter space from searches for...
Andriy Badin
(Wayne State University)
28/07/2009, 14:00
Heavy Flavor Physics [bottom, charm, tau]
We present a calculation of 1/m2b corrections to the lifetime differences
of Bs mesons in the heavy-quark expansion. We find that they are small
to significantly affect \Delta\GammaB_s and present the result
for lifetime difference including non-perturbative 1/mb and 1/m2b
corrections. We also analyze the generic B = 1 New Physics contributions
to the lifetime difference of Bs mesons and...
Yagmur Torun
(Illinois Institute of Technology)
28/07/2009, 14:00
Accelerator Physics
The MuCool program focuses on studying the components needed for a muon ionization cooling channel. These include normal-conducting RF cavities, liquid hydrogen and lithium hydride absorbers and superconducting solenoids. This talk will describe the facility that has been built at Fermilab to carry out this R and D, will outline the various aspects of the program and will give the latest...
Dr
Oleg Kamaev
(University of Minnesota)
28/07/2009, 14:00
Particle Astrophysics and Cosmology
The Cryogenic Dark Matter Search (CDMS) experiment uses low-temperature solid-state detectors to seek Weakly Interacting Massive Particle (WIMP) and has the world's best exclusion limit on the WIMP-nucleon spin-independent cross section. The experiment uses the ionization and athermal phonons from particle interactions to discriminate between candidate (nuclear recoil) and background (electron...
Nurcan Ozturk
(University of Texas at Arlington)
28/07/2009, 14:00
Beyond the Standard Model
Supersymmetry (SUSY) is one of the most attractive extentions of the Standard Model. If SUSY exist in nature it can be discovered at the LHC if SUSY particles have masses at sub-TeV range. SUSY discovery strategies with early data by the ATLAS and CMS experiments are presented. SUSY mass and parameter measurements are also demonstrated.
Dr
Markus Schulze
(Johns Hopkins University)
28/07/2009, 14:00
Top Quark Physics
The production of top quark pairs at hadron colliders is an important process for understanding QCD dynamics and is sensitive to new physics. The data collected at the Tevatron and the sizable cross section at the Large Hadron Collider allow for precision measurements. To match the experimental precision, radiative corrections must be included in the theory predictions.
We present results...
Prof.
Lisa Everett
(University of Wisconsin)
28/07/2009, 14:00
Neutrino Physics
This talk will provide an overview of theoretical models of neutrino masses and lepton mixing angles.
Dr
Thomas Andrew Schwarz
(University of California (UCD))
28/07/2009, 14:15
Top Quark Physics
The top quark is the heaviest particle yet observed. With the possibility for the massive top to couple to new physics at high energy scales, CDF has many complementary analyses in each top decay channel which provide strong tests of the standard model and physics beyond. With several fb-1 of data now accumulated at CDF, we are able to measure the top pair production rate with unprecedented...
Prof.
Ilan Levine
(Indiana University South Bend)
28/07/2009, 14:20
Particle Astrophysics and Cosmology
The COUPP collaboration* has revived the bubble chamber technique for use in WIMP dark matter search experiments. The first engineering run, which resulted in improved limits on spin-dependent WIMP-proton couplings, were reported in 2008
using a two kg target. Since then improvements including radiopurification efforts, cosmic ray vetos, design and construction of larger scale chambers (4kg,...
Kathryn Grim
(Fermi National Accelerator Laboratory)
28/07/2009, 14:20
Education and Outreach in HEP
Emerging forms of social media such as Facebook, Twitter and YouTube have become primary ways for many members of all generations to stay connected and find out about what is going on in the world around them. Particle physics communicators have begun to exploit social media to connect with their audiences.
Scientists from around the world contribute to Quantum Diaries, a collection of...
Dr
Haidong Liu
(University of California (UCD)-Unknown-Unknown)
28/07/2009, 14:25
Heavy Ion Physics/Hot and Dense QCD
The measurements of charmonium and bottomonium resonances in ultra-relativistic heavy-ion collisions provide crucial information on the dynamics of the created high-density QCD matter. The suppression of heavy quark-antiquark bound states is generally agreed to be one of the most direct probes of QGP formation due to screening of the color potential in the plasma. In addition, the production...
Dr
Galyaev Evgeny
(University of Texas at Dallas)
28/07/2009, 14:25
First Results from LHC
The ATLAS Pixel Detector is the innermost detector of the ATLAS experiment at the Large Hadron Collider at CERN. Approximately 80M electronic channels of the detector, made of silicon, allow detecting particle tracks and secondary vertices with very high precision.
After connection of all of the cooling components and services, and verification of their operation the ATLAS Pixel Detector...
Jyotsna Osta
(Notre Dame)
28/07/2009, 14:30
Electroweak Physics [W/Z]
We present the most precise single measurement of the W boson mass and and a measurement
of the W width using data collected with the D0 experiment. An integrated luminosity of
1 fb-1 yields 499,830 W->evcandidates. The mass is measured with an uncertainty of less than
45 MeV while the width uncertainty is less than 75 MeV.
Rolland Johnson
(Muons, Inc.)
28/07/2009, 14:30
Accelerator Physics
Inventions and synergies with global and national goals are rapidly improving the prospects for a high luminosity muon collider at the energy frontier. Analytical calculations, numerical simulations, and experimental measurements are coming together to make a strong case for a series of machines to be built, where each one is a precursor to the next, with its own unique experimental and...
Alexander Friedland
(Los Alamos National Laboratory)
28/07/2009, 14:30
Neutrino Physics
I will review the physics of flavor transformations of supernova neutrinos. I will then discuss time dependent features in the neutrino signal caused by the changing density profile in the explosion.
Dr
Kai Yi
(Physics and Astronomy Department-University of Iowa-Unknown)
28/07/2009, 14:35
Hadron Spectroscopy
With growing datasets collected by the CDF II experiment, studies of the
spectroscopy of mesons containing heavy quarks becomes more exciting. The
CDF experiment has good capabilities in both charm and bottom sector. This
capability allowed also to contribute to the study of the Zoo of states
called X,Y,Z. In this area we present a recent update of the mass
measurement of X(3872). The...
Dr
Andy Haas
(SLAC)
28/07/2009, 14:35
Higgs Physics
We report on a first search for production of Higgs bosons decaying into neutral long-lived particles (NLLP) which each decay to a bbbar pair, using 3.6 fb^-1 of data recorded with the D0 detector at the Fermilab Tevatron collider. We search for pairs of displaced vertices in the tracking detector at radii in the range 1.6--20 cm from the beam axis. No significant excess is observed above...
Mikhail Arov
(Louisiana TU, Coll. Eng. & Science-Unknown-Unknown)
28/07/2009, 14:35
Top Quark Physics
We present recent results related to the measurement of top quark production using ppbar collisions recorded with the D0 Detector at the Tevatron. The results are: Measurement of the top production cross section (abstract 216), search for W' decaying to top and b (226), forward-backward asymmetries in top quark pair production (227), Search for tt' resonances (231) and search for charged Higgs...
Dr
Tapas Sarangi
(High Energy Physics-Department of Physics-University of Wisconsi)
28/07/2009, 14:40
Beyond the Standard Model
An inclusive search for Supersymmetry based on lepton(s), multi-jets and
missing transverse energy final state is studied in ATLAS. We
discuss discovery potential for SUSY signal in the early LHC data with low
integrated luminosity at 10 TeV CM energy.
Ryan Dickherber
(Washington University in St. Louis)
28/07/2009, 14:40
Particle Astrophysics and Cosmology
A leading candidate for astrophysical dark matter (DM) is a massive particle with a mass in the range from 50 GeV to greater than 10 TeV and an interaction cross section on the weak scale. The self-annihilation of such particles in astrophysical regions of high DM density can generate stable secondary particles including very high energy gamma rays with energies up to the DM particle mass....
Dr
Mitchell Wayne
(University of Notre Dame)
28/07/2009, 14:40
Education and Outreach in HEP
QuarkNet is national program of Education and Outreach in Particle Physics and now in its 12th year. The program consists of 52 Centers distributed across 25 States and Puerto Rico. Annually participating are 450 high school teachers, 100 high school students, and 100 particle physicist mentors across a dozen experiments. An overview of project status and program activities will be presented.
Benedetto di Ruzza
(CDF Collaboration)
28/07/2009, 14:48
An interesting decay mode of the Bs meson is into a phi pair: this is a
vector-vector decay dominated by b->sss penguin transition which is a
sensitive probe for possible new physics effects. The only existing sample
of this mode was reconstructed by the CDF experiment from 0.2 fb-1 of data,
and consisted of only 8 signal events. Here we present new results based
on a clean sample of...
Zijin Guo
(Johns Hopkins University-Unknown-Unknown)
28/07/2009, 14:50
First Results from LHC
We present the first results of the full CMS Silicon Tracker alignment based
on several million reconstructed tracks from the cosmic data taken during
the commissioning runs with the detector in its final position. Implication
for CMS physics performance is discussed. The all-silicon design of the
tracking system of the CMS experiment is expected to provide 1-2% resolution
for 100...
Dr
Scott Pratt
(Michigan State University)
28/07/2009, 14:50
Heavy Ion Physics/Hot and Dense QCD
I will review how two-particle correlations, or Hanbury-Brown Twiss (HBT) measurements, are providing detailed tests of the hydrodynamic evolution of heavy ion collisions at RHIC. The talk will focus on how hydrodynamics is implemented for this kind of physics and how the details of the implementation can affect final-state observables, especially HBT.
Christopher Paul Hays
(University of Oxford)
28/07/2009, 14:50
Electroweak Physics [W/Z]
I will review experimental issues related to W and Z boson production at hadron
colliders, with particular emphasis on the measurement of the W boson mass.
Recent measurements of W and Z production from the Tevatron will be discussed,
as well as topics covered at the recent Milan workshop on the W mass measurement.
Dilip Jana
(University of Oklahoma)
28/07/2009, 14:55
Top Quark Physics
Due to the large top quark production cross section at the LHC energies, the ATLAS experiment is expected to have enough statistics to measure the top quark cross section even at initial luminosities. Recent studies performed in ATLAS on the development of top quark pair cross section measurements using the likelihood method will be discussed. An emphasis will be on measurements with data that...
Eric Braaten
(Ohio State University)
28/07/2009, 15:00
Hadron Spectroscopy
In most recent analyses of D^0 D-bar^0 pi^0 decays of the X(3872), these events were assumed to come from D^{*0} D-bar^0 or D^0 D-bar^{*0} followed by the decay of the D^{*0} or D-bar^{*0}. Given this assumption, every D^0 D-bar^0 pi^0 event near the D^{*0} D-bar^0 threshold is assigned an invariant mass above the threshold. Such an analysis necessarily yields a mass for the X(3872) that is...
Prof.
Greg Snow
(University of Nebraska)
28/07/2009, 15:00
The scale and scope of the physics studied at the Auger Observatory offer significant opportunities for original outreach work. Education, outreach and public relations of the Auger collaboration are coordinated in a separate task whose goals are to encourage and support a wide range of education and outreach efforts that link schools and the public with the Auger scientists and the science of...
Mr
Alexander Stuart
(University of Wisconsin-Madison)
28/07/2009, 15:00
Neutrino Physics
I investigate the possibility of using icosahedral symmetry as a family symmetry group in the lepton sector, focusing on the intriguing hypothesis that the solar neutrino mixing angle is governed by the golden ratio. I will present a basic toolbox for model-building using icosahedral symmetry, including explicit representation matrices and tensor product rules. As a simple application, I...
giovanni bonvicini
(Wayne State University)
28/07/2009, 15:00
Accelerator Physics
Results from extended operation of the CESR Large Angle Beamstrahlung Monitor are presented.
Daniel Phalen
(University of Michigan - Ann Arbor)
28/07/2009, 15:00
Particle Astrophysics and Cosmology
Recently there have been many anomalies in the cosmic ray data in the energy range 10 GeV to 1 TeV. In addition, there is the WMAP "Haze" excess in the 22 GHz to 93 GHz frequency range. We propose that pulsars could describe all of these excesses and discuss the relevant astrophysics.
Prof.
Yury Kolomensky
(University of California, Berkeley)
28/07/2009, 15:00
Higgs Physics
We search for a light CP-odd Higgs boson, A^0, in the radiative
decay of Y(3S) --> gamma A^0, A^0 --> tau+ tau-,
tau+ --> e+ nu_e nubar_tau or tau+ --> mu+ nu_mu nubar_tau.
The data sample contains 122 million Y(3S) events collected
with the BaBar detector. We find no evidence for a narrow structure
in the studied mass region of 4.03 < m_{A^0} < 10.10 GeV/c^2 and set
the...
Gheorghe Lungu
(Rockefeller University)
28/07/2009, 15:00
Beyond the Standard Model
We present a search for supersymmetry (SUSY) in the fully hadronic final state with the CMS detector at the LHC.
This final state contains at least two jets and a significant transverse energy imbalance due to neutralinos escaping detection.
The background to all-hadronic signature arise from QCD multijet production, ttbar and electroweak boson+jet production.
These background can be...
Andrei Gaponenko
(Lawrence Berkeley National Laboratory)
28/07/2009, 15:10
Top Quark Physics
The observation of the top quark will be an important milestone in
ATLAS. This talk reviews methods that ATLAS plans to use to observe
the top quark pair production process and measure its cross section.
Dr
Jin Li
(University of Hawaii)
28/07/2009, 15:12
Heavy Flavor Physics [bottom, charm, tau]
We report recent results on $B_s$ decays, including measurements of
$J/\psi \eta(')$ and several other modes. The results are based on large data sample collected at the $\Upsilon(5S)$ resonance with the Belle detector at the KEKB asymmetric $e^+e^-$ collider.
Grant Gorfine
(Bergische Universitaet Wuppertal)
28/07/2009, 15:15
First Results from LHC
Alignment of the ATLAS Inner Detector tracking system
The Large Hadron Collider (LHC) at CERN is the world's largest particle accelerator. It will collide two
proton beams at an unprecedented centre of mass energy of 14 TeV. ATLAS is equipped with a
charged-particle tracking system built on two technologies: silicon and drift-tube based detectors,
constituting the ATLAS Inner...
Helen Louise Caines
(Yale University)
28/07/2009, 15:15
Heavy Ion Physics/Hot and Dense QCD
By studying p-p collisions we hope to improve our understanding of the
fundamental constituents of matter and how they form into colorless
objects. Measurements of the inclusive jet cross-sections and
fragmentation properties have confirmed that QCD based calculations give
a good description of the hard scattering processes. However, as our
analysis of jets has improved it has...
Ping Tan
(FNAL)
28/07/2009, 15:20
Electroweak Physics [W/Z]
At LHC, the production cross sections of the W/Z bosons are at tens to
hundreds nanobarns level. Studies of these processes can not only help the
detector commissioning, but also help to establish standard candles for
exploring beyond-the-SM physics, such as searches for Zprime, Wprime
particles. The leptonic decays of W/Z bosons are expected to have very high
trigger efficiency and...
Dr
Sudhir Gupta
(Iowa State University)
28/07/2009, 15:20
Beyond the Standard Model
If neutrinos are Dirac type, in supersymmetry (SUSY), their masses can be explained by the introduction of an additional right chiral (neutrino) superfield which interacts with other superparticles through a tiny neutrino Yukawa coupling. We found that superpartner of such a right chiral neutrino (sneutrino) can be lightest among all the superparticles in a wide range of SUSY parameter space ...
Jorge S. Diaz
(Indiana University)
28/07/2009, 15:20
Neutrino Physics
Lorentz symmetry is a key feature of our best description of nature. Among the different tests of this fundamental symmetry are ones with neutrino oscillations, which can provide a sensitive measurement of suppressed signals of new physics. The talk describes the neutrino sector of the Standard-Model Extension, which represents a general modification of the standard neutrino massive model...
Ms
Tracy Slatyer
(Harvard University)
28/07/2009, 15:20
Particle Astrophysics and Cosmology
A new force in the dark sector, with GeV-scale force carriers, can change the expected properties of SUSY WIMP dark matter in significant ways. The annihilation cross section at low velocities is boosted by a Sommerfeld enhancement, perhaps by 2 or 3 orders of magnitude; the WIMP annihilates to the new force carrier, which immediately
decays to light particles, bypassing constraints from...
Randal Ruchti
(University of Notre Dame)
28/07/2009, 15:20
Ms
Martina Hurwitz
(University of Chicago)
28/07/2009, 15:25
WZ and ZZ Observation in lnujj and nunujj final states
Prof.
Daniel Kaplan
(Illinois Institute of Technology)
28/07/2009, 15:25
Hadron Spectroscopy
Fermilab operates the world's most intense antiproton source. Newly proposed experiments can use those antiprotons either parasitically during Tevatron Collider running or after the Tevatron Collider finishes in about 2011. For example, the annihilation of 8 GeV antiprotons might make the world's most intense source of tagged D^0 mesons, and thus the best near-term opportunity to study charm...
Dr
Michael Syphers
(Fermi National Accelerator Laboratory)
28/07/2009, 15:30
Accelerator Physics
Dr
Ashish Kumar
(SUNY/Buffalo)
28/07/2009, 15:35
Ashfaq Ahmad
(Stony Brook University)
28/07/2009, 15:40
First Results from LHC
For particle and jet energies above a few GeV, calorimeters provide the most precise measurements. Thus, calibration of the calorimeters is crucial to achieve those physics goals that are dependent on the energy resolution and scale. For the ATLAS EM calorimeter, the strategy is to obtain a global constant term that is less than 0.7\%. Information from test beams and the hardware calibration...
Andriy Badin
(Wayne State University)
28/07/2009, 15:40
Particle Astrophysics and Cosmology
We examine annihilation of light bosonic Dark Matter into pair of photons in model-independent way. We consider the simplest generic Lagrangian describing such process and then compare results to the available experimental data. We match effective generic lagrangian to results obtained within
particular Dark matter models and determine possible constrains onto
parameter space of those models.
Mr
Lashkar Kashif
(Harvard University)
28/07/2009, 15:40
Electroweak Physics [W/Z]
One of the benchmark analyses to be performed with the first data at the CERN Large Hadron Collider will be the measurement of the Z boson transverse momentum spectrum. I will present a prospective analysis for this measurement in the dimuon channel on the ATLAS experiment. The analysis uses simulated datasets at a center-of-mass energy of 10 TeV. After summarizing the motivations for the...
Eunsin Lee
(Texas A&M University)
28/07/2009, 15:40
Beyond the Standard Model
Many new physics models predict mechanisms that could produce a $\gamma$ and jets signature. We search in the $\gamma$ + jets and $\gamma$ + jets + $\met$ channels, independent of any model, for new physics using 2~fb$^{-1}$ of CDF Run II data collected at the Fermilab Tevatron from $p\bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV. A variety of techniques are applied to estimate the standard...
Terence Tarnowsky
(Michigan State University)
28/07/2009, 15:40
Heavy Ion Physics/Hot and Dense QCD
The measurement of particle correlations and fluctuations has been suggested as a method to search for the existence of a phase transition in relativistic heavy ion collisions. A change in the observed fluctuations is expected in global quantities such as baryon number, strangeness, or charge near a QCD critical point or a first order phase transition.
Results for short and long-range...
Dr
Marilisa De Serio
(I.N.F.N. Bari)
28/07/2009, 15:40
Neutrino Physics
The OPERA experiment has been designed to prove the existence of nu_mu -> nu_tau oscillations in the atmospheric sector by the direct observation of nu_tau appearance in the CNGS nu_mu beam, produced at CERN.
The detector, installed at Laboratori Nazionali del Gran Sasso (Italy), 730 km away from the neutrino source, consists of a modular target made of lead - nuclear emulsion bricks...
Dr
Don Lincoln
(Fermilab)
28/07/2009, 16:00
Education and Outreach in HEP
Writing for a popular audience requires a very different approach than for our scientific colleagues. In this talk, an author of two popular HEP books, one popular magazine article and a recurring article in Fermilab Today shares some advice and experience.
Ms
Kathryn Grim
(Fermilab)
28/07/2009, 16:20
Education and Outreach in HEP
Kathryn Grim
Media Training
If you watched the Daily Show’s feature on the Large Hadron Collider in May, you will remember the look on John Ellis’ face when John Oliver asked him, "Evilgeniussayswhat?" It's impossible to anticipate everything a reporter will ask you, but this media training will teach you how to prepare for interviews with print, television or radio journalists and increase...
Dr
Ilya Selyuzhenkov
(Indiana University)
28/07/2009, 16:30
Heavy Ion Physics/Hot and Dense QCD
One of the most interesting and important phenomena predicted
to occur in heavy ion collisions is the local strong parity violation.
In non-central collisions, it is expected to result in charge separation
of produced particles along the system's orbital momentum.
I will report on results of the charge separation measurement
in Au+Au and Cu+Cu collisions at sqrt{sNN} = 200 and 62...
Kevin Black
(Harvard University)
28/07/2009, 16:30
Beyond the Standard Model
The unprecedented energy of the Large Hadron Collider (LHC) will allow us to probe
the TeV energy scale for the first time and elucidate the nature of electroweak symmetry breaking.
New heavy particles may be produced leading to dramatic signatures in the LHC detectors.
The increase in energy from previous experiments will allow us to probe a previously unreachable regime. I will review...
Mr
Phillip Killewald
(The Ohio State University)
28/07/2009, 16:30
First Results from LHC
The CMS detector is a general-purpose particle detector centered on one of the interaction points at the LHC. On the endcaps of the detector, interspersed between iron disks that serve as a return yoke for the detector's solenoidal magnetic field, are mounted 468 cathode strip chambers (CSCs). These chambers will serve as a trigger and spectrometer for muons generated in high-energy...
David Atwood
(Iowa State University)
28/07/2009, 16:30
B factories which are run at the Upsilon 5s peak can produce Bs pairs in an entangled state. This system therefore provides methods to measure CP violation and mixing in the Bs meson that are not available if Bs mesons are produced in hadronic collisions. I will discuss efficient strategies for using entangled Bs pairs to learn about the mixing of the Bs meson.
Prof.
Nikolaos Kidonakis
(Kennesaw State University)
28/07/2009, 16:30
Top Quark Physics
I present the latest results on the theoretical cross section for top-antitop pair production
as well as for single top production at the Tevatron and the LHC. The calculations include
higher-order soft-gluon corrections which are dominant near threshold. The top quark transverse
momentum distribution is also presented.
Dr
Pavel Snopok
(UC Riverside)
28/07/2009, 16:30
Accelerator Physics
In the current Muon Collider design the muon beam 6D phase space volume must be reduced several orders in magnitude in order to be able to further accelerate it and inject it into the storage ring. Ionization cooling is currently the only feasible option for cooling the beam within the muon lifetime. The RFOFO ring is one of the feasible options currently under active investigation along with...
Dr
Satyajit Behari
(CDF)
28/07/2009, 16:30
Hadron Spectroscopy
Weakly decaying bottom baryons can in principle be clearly reconstructed from
their decays into J/psi or other charmed hadrons. However, their
properties like lifetimes and branching fractions have long been quoted
only as averages over all states, as the only directly observed b-baryon
was the Lambda_b. Only in year 2007, the two Tevatron experiments observed
the Xi_b, and recently the...
Tyce DeYoung
(Pennsylvania State University)
28/07/2009, 16:30
Particle Astrophysics and Cosmology
IceCube is a cubic kilometer neutrino telescope under construction at the South Pole, a successor to the first-generation AMANDA telescope. IceCube is now three quarters complete, with completion expected in early 2011, and data taken with the partially built detector already provides a sensitivity surpassing the complete AMANDA-II data set. Results from searches for astrophysical sources of...
Dr
Michael Kirby
(Northwestern University)
28/07/2009, 16:30
Higgs Physics
We present a search for the Standard Model Higgs boson produced via the WH to WWW(*) process at a center-of-mass energy of sqrt{s}=1.96 TeV with the D0 detector at the Fermilab Tevatron collider. We require two like-sign leptons (electrons or muons) with about 5 fb-1 of data. This channel provides significant sensitivity in the intermediate Higgs boson mass range. As well as inclusion of the...
Mr
Tsutomu Fukuda
(Nagoya university (JAPAN))
28/07/2009, 16:30
Neutrino Physics
OPERA is an experiment that aims at detecting the appearance of tau-neutrinos in an almost pure muon-neutrinos beam through oscillation. The CC tau-neutrino interaction is identified through the detection of the tau lepton decay topology in the so-called Emulsion Cloud Chambers (ECC), passive lead sheets constituting the target mass interleaved with nuclear emulsion films providing the high...
Chang Liu
(Purdue)
28/07/2009, 16:30
Electroweak Physics [W/Z]
We present the strategy of the measurement of the differential cross-section
of Drell-Yan dimuon production in early proton-proton collision data
produced by the LHC accelerator at $\sqrt{s}=$~10~TeV and collected by the
CMS detector. We study the Drell-Yan dimuon process for the whole mass
range, starting around the $\Upsilon$ peaks, and going through the $Z$ peak
to the kinematic...
Dr
Cecilia Gerber
(University of Illinois at Chicago)
28/07/2009, 16:45
Top Quark Physics
We report first observation of the electroweak production of single top quarks in ppbar collisions at sqrt(s) = 1.96 TeV based on 2.3 fb^-1 of data collected by the D0 detector at the Fermilab Tevatron Collider. Using events containing an isolated electron or muon and missing transverse energy, together with jets originating from the fragmentation of b quarks, we measure a cross section of...
Ashfaq Ahmad
(Stony Brook University)
28/07/2009, 16:50
Electroweak Physics [W/Z]
The study of W or Z boson with accompanying hadronic jets in final states is of high importance at hadron colliders both to understand Standard Model processes and to measure background to Beyond Standard Model physics searches. The presence of one or more jets in the final state increases the complexity for the reconstruction of leptons and of missing transverse energy. The ATLAS prospects...
PAUL NIENABER
(SAINT MARY'S UNIVERSITY OF MINNESOTA)
28/07/2009, 16:50
Neutrino Physics
Since its 2007 electron neutrino search result in 2007, the MiniBooNE collaboration has continued to press forward with additional neutrino and antineutrino running, an expanded investigation of the low energy excess seen in its first results, appearance and disappearance analyses in both neutrino and antineutrino data samples, and an array of unprecedented cross-section measurements. This...
Sung Woo Youn
(Northwestern U./Fermilab)
28/07/2009, 16:54
We search for the semi-inclusive process Bs to Ds(*)Ds(*) using
2.8 fb-1 of ppbar collisions at sqrt{s}=1.96 TeV recorded by the D0
detector operating at the Fermilab Tevatron Collider. We observe 26.6 pm 8.4
signal events with a significance above background of 3.2 standard
deviations yielding a branching ratio of 0.035 pm 0.010 (stat) pm 0.011(syst).
Under certain theoretical...
Dr
Jim Pivarski
(Texas A&M University)
28/07/2009, 16:55
First Results from LHC
As its name suggests, the Compact Muon Solenoid (CMS) features a full tracking spectrometer for identifying and measuring the momenta of muons. Every muon passes through 18-44 layers, providing a highly redundant track capable of validating and improving the momentum measurement from the inner tracker. But like any tracking system, its performance depends on precise knowledge of the positions...
Michael Issah
(Vanderbilt University)
28/07/2009, 16:55
Heavy Ion Physics/Hot and Dense QCD
An important goal of the experiments at the Relativistic Heavy Ion Collider (RHIC) is to produce and study the hot and dense matter produced in heavy-ion collisions. To this effect, several probes are used to infer the properties of the matter formed. Two such probes are jets produced in hard scattering processes and anisotropic flow from pressure gradients which develop in the expanding...
Boris Kayser
(Fermilab)
28/07/2009, 16:55
Particle Astrophysics and Cosmology
We briefly explain how the present baryon-antibaryon asymmetry of the universe could have arisen through leptogenesis, and then discuss a new version of leptogenesis in which CP violation in electromagnetic decays plays the central role.
Dr
Jennifer Pursley
(University of Wisconsin)
28/07/2009, 16:55
Higgs Physics
We present a search for standard model (SM) Higgs to WW production in dilepton plus missing transverse energy final states using approximately 5.0 fb-1 of integrated luminosity. In order to maximize sensitivity, the multivariate discriminants used to separate signal from background in the opposite-sign dilepton event sample have been independently optimized for final states with either zero,...
Prof.
Peter McIntyre
(Texas A&M University)
28/07/2009, 17:00
Accelerator Physics
Recent developments in accelerator physics and super-conducting magnet technology make it reasonable to extend proton-antiproton colliding beams from the 2 TeV of the Tevatron to 100 TeV in the existing SSC tunnel, with luminosity ~10^35 /cm2s. At 100 TeV boson-boson fusion becomes a significant initial state for production of new massive particles. Petavac would extend the mass reach beyond...
Richard Hill
(University of Chicago)
28/07/2009, 17:10
Neutrino Physics
The production of single photons in low energy (~1 GeV) neutrino scattering off nucleons is analyzed in the Standard Model. At very low energies, E(nu) << 1 GeV, a simple description of the chiral lagrangian involving baryons and arbitrary SU(2)_L x U(1)_Y gauge fields is developed. Extrapolation of the process into the ~1-2 GeV region is treated in a simple phenomenological model. Coherent...
Yunhe Xie
(Brown University)
28/07/2009, 17:10
Beyond the Standard Model
We report on a new search for charged massive stable particles
(CMSPs) at the D0 Experiment at the Fermilab Tevatron collider.
These electrically charged particles have sufficiently long lifetimes
to penetrate through the entire D0 detector before decaying. CMSPs
are predicted in many theories beyond the Standard Model. We
use time-of-flight information to search for pair-produced...
Nagesh Kulkarni
(Wayne State University)
28/07/2009, 17:18
The CDFII detector at the Fermilab Tevatron has now collected more than 5
fb-1 of data, and using an impact parameter trigger has has collected the
largest existing samples of D*+ -> D0pi+ , where D0 decays as D0-> h+h-
(with h = K or pi). We present updated measurements of decay rates in
these channels, which allow precise measurements of CP violation and flavor
mixing in the charm sector.
Dr
Edward Diehl
(University of Michigan)
28/07/2009, 17:20
First Results from LHC
The ATLAS muon spectrometer consists of several major components: Monitored Drift Tubes (MDTs) for precision measurements in the bending plane of the muons, supplemented by Cathode Strip Chambers (CSC) in the high $\eta$ region; Resistive Plate Chambers (RPCs) and Thin Gap Chambers (TGCs) for trigger and second coordinate measurement in the barrel and endcap regions, respectively; an optical...
Mr
Timothy Cohen
(University of Michigan)
28/07/2009, 17:20
Particle Astrophysics and Cosmology
We show that the baryon asymmetry of the universe can be realized via the out-of-equilibrium decays of TeV scale exotic vector-like squarks. Since baryon number and CP violation will occur in the superpotential, this mechanism is relatively insensitive to the structure of supersymmetry breaking. Examination of the cosmology will lead to restrictions on the reheat temperature of the universe...
Dr
Nils Krumnack
(Baylor University)
28/07/2009, 17:20
Higgs Physics
A combination of several searches for standard model Higgs boson production at CDF using data samples up to 5fb-1 of integrated luminosity is performed. We calculate combined upper limits on the ratio of the Higgs boson cross section times branching ratio to its standard model prediction for Higgs boson masses between 100 GeV/c^2 and 200 GeV/c^2.
Dr
Monika Sharma for the STAR Collaboration
(Wayne State University)
28/07/2009, 17:20
Heavy Ion Physics/Hot and Dense QCD
The event anisotropy measurements at RHIC suggest the matter created in heavy-ion collision flows with very little viscosity. Precise determination of "shear viscosity-to-entropy density"
ratio is currently a subject of extensive study[1]. We present measurements of differential transverse momentum correlation functions from the STAR experiment in Au+Au collisions
at $\sqrt{s_{NN}}$ = 200...
Dr
Sonny Mantry
(University of Wisconsin at Madison)
28/07/2009, 17:25
Top Quark Physics
A new factorization theorem for the precision extraction of the top mass from top pair production far above threshold at the ILC is presented. The factorization theorem gives a precise relation between the measurement of properties of top jet distributions, such as thrust or hemisphere invariant mass, and the top mass. The observable is shown to be sensitive to a new class of top mass schemes...
Dr
James Jenkins
(Los Alamos National Laboratory)
28/07/2009, 17:30
Neutrino Physics
Low energy photon production is an important background to many current and future precision neutrino experiments. I present a phenomenological study of t-channel radiative corrections to neutral current neutrino nucleus scattering. After introducing the relevant processes and phenomenological coupling constants, I will explore the derived energy and angular distributions as well as total...
Manfred Wendt
(Fermi Naional Accelerator Laboratory)
28/07/2009, 17:30
Accelerator Physics
Recent and upcoming particle accelerators for HEP, as well as for applied science demand a very high beam quality, e.g. high beam power in the multi MW range, focused beams at the IP to a size of a few nm, fsec range bunch length, low beam halo and tails, high beam stability, etc. To characterize, verify and improve these beam parameters, advances in beam instrumentation and diagnostics are...
Ioannis Katsanos
(University of Nebraska - Lincoln)
28/07/2009, 17:30
Beyond the Standard Model
The high-mass spectrum of lepton and photon pairs is sensitive
to a broad array of new physics. Examples are searches for
extra dimensions in different models in the dielectron, dimuon,
and diphoton channels, photon + missing transverse energy and Z'
bosons with Standard-Model-like couplings to fermions as well
as in a variety of GUT-inspired models. In addition, the data
sample can be...
Dr
Bennie Ward
(Baylor University)
28/07/2009, 17:40
Particle Astrophysics and Cosmology
We show that, by using amplitude-based resummation techniques for Feynman's formulation of Einstein's theory, we get quantum field theoretic predictions for the UV fixed-point values of the dimensionless gravitational and cosmological constants. Connections to the phenomenological asymptotic safety analysis of Planck scale cosmology by Bonanno and Reuter are discussed.
Daniel Boline
28/07/2009, 17:40
Top Quark Physics
We present recent results related to the measurement of the top quark mass using ppbar collisions recorded with the D0 Detector at the Tevatron. The results are: A direct measurement of the mass difference between top and antitop quarks (abstract 41), Measurement of the top quark mass in the leptons+jets channel (abstract 215) and in the di-lepton channel (abstract 218).
Prof.
Michael Sokoloff
(University of Cincinnati)
28/07/2009, 17:42
We present evidence of $D^0$-$\bar{D^0}$ mixing using a time-dependent amplitude analysis of the decay
$D^0\rightarrow K^+ \pi^- \pi^0$ in a data sample of 384 fb$^{-1}$ collected with the $B\!a\!B\!a\!r$ detector at the PEP-II
$e^+e^-$ collider at SLAC. Assuming $C\!P$ conservation, we measure the mixing parameters $x'_{K\pi\pi^0} = $[$2.61
\mbox{}^{\rm +0.57}_{\rm -0.68}$\,(stat.)$\pm...
Chang Liu
(Purdue University)
28/07/2009, 17:45
First Results from LHC
Despite of the delay of physics collisions at the Large Hadron Collider
(LHC), induced by the incidence in September 2008, the CMS collaboration is
utilizing the commissioned detector to take large amounts of cosmic data.
About 300 million cosmic events were recorded with the full detector and a
magnetic field of 3.8~T turned on. The effort has provided significant
statistics to...
Josh Vredevoogd
(MSU)
28/07/2009, 17:45
Dr
Ian-Woo Kim
(University of Wisconsin-Madison)
28/07/2009, 17:50
Beyond the Standard Model
Considering two missing energy particles with odd parity can be decayed
from a heavy particle with even parity by two-step cascade,
we observe kinematic cusp structures in invariant mass
distributions of resonant particle decay into missing particles. Knowing a
parent mass from direct resonant decay into standard model particles, we
determine the mass of the intermediate particle and the...
Prof.
Christopher White
(Illinois Institite of Technology)
28/07/2009, 17:50
Neutrino Physics
The Daya Bay Reactor Anti-Neutrino Experiment is a neutrino oscillation experiment designed to observe and measure the neutrino mixing angle θ13. The sensitivity goal is 0.01 in sin^2(2θ13) at the 90% confidence level, a significant improvement over the current limit. This will be accomplished by measuring the relative rates and energy spectra of reactor electron antineutrinos with multiple...
Dr
Camille Ginsburg
(Fermi National Accelerator Laboratory)
28/07/2009, 18:00
Accelerator Physics
Abstract to appear here
Costas Vellidis
28/07/2009, 18:05
Top Quark Physics
We report the results of the measurements of the top quark mass in the lepton+jet, dilepton, and all-jets channels using top pair events corresponding to an integrated luminosity of more than 4 fb-1 from proton- antiproton collisions at the Tevatron recorded by the CDF II detector. We present different results using different techniques in the lepton + jets, dilepton, all-jets channels and...
Dr
Adam LINCOLN
(Wayne State University)
28/07/2009, 18:06
Heavy Flavor Physics [bottom, charm, tau]
The decays of D0 and D0bar mesons produced from e+ e- annihilation at the psi(3770) resonance reflect quantum correlations, so that decay rates are sensitive to interference between indistinguishable final states. Using the CLEO-c detector at the Cornell Electron Storage Ring, we measure the time-independent decay rates of D0 decays to K- pi+, K+ pi-, several CP eigenstates, and...
Aram Avetisyan
(Brown)
28/07/2009, 18:10
Beyond the Standard Model
Presented is a study of searches for two exotic particles - a heavy top quark partner with a fractional charge of 5/3, T(5/3), and its partner, the heavy B quark with charge -1/3. These particles decay to a top quark and a W boson, leading to very busy events with multi-leptons and multi-jets. Processes where same-sign dileptons are produced are considered. The backgrounds are predominantly...
Dr
Debabrata Mohapatra
(Virginia Polytechnic Institute & State University)
28/07/2009, 18:10
Neutrino Physics
Search for $\theta_{13}$, the last unknown mixing angle is extreamly important in
understanding the lepton flavor mixing matrix, and investigation of the CP violation
in the lepton sector. The reactor neutrino experiments can provide a clean laboratory
for the $\theta_{13}$ measurement via electron antineutrino disappearance.
The Daya Bay experiment proposes to measure...
Lee Roberts
(Boston University)
29/07/2009, 09:00
Randal Ruchti
(University of Notre Dame)
30/07/2009, 12:00
Valerie Halyo
(Princeton University)
30/07/2009, 14:00
Beyond the Standard Model
Dileptons are among the cleanest probes of new physics waiting to be discovered at the LHC. In this review, I discuss an assortment of signatures involving dileptons and the exciting new physics they may help uncover. High invariant mass dileptons with opposite sign may reveal a new resonance, a possible remnant of some unified gauge theory. On the other hand, same-sign dileptons alongside...
Dr
Zdenek Dolezal
(Institute of Particle and Nuclear Physics)
30/07/2009, 14:00
Detector Technology and R&D
The ATLAS experiment at the CERN Large Hadron Collider (LHC) has started taking data last autumn with the inauguration of the LHC. The SemiConductor Tracker (SCT) is the key precision tracking device in ATLAS, made up from silicon micro-strip detectors.
The completed SCT has been installed inside the ATLAS experimental hall. Since then the detector was operated for many months under realistic...
Carol Johnstone
(Fermi National Accelerator Laboratory)
30/07/2009, 14:00
Accelerator Physics
A new concept in non-scaling FFAGs has been invented in which the machine tune is stable over an extended acceleration cycle, a factor of a 3-6, or more, in momentum. Fermilab Research Association (FRA) has elected to patent this concept and a strong collaborative design effort to optimize, simulate, and demonstrate the technical feasibility of this accelerator approach is underway to be...
Brian Cole
(Physics Dept., Pupin Physics Lab.-Columbia University-Unknown)
30/07/2009, 14:00
Heavy Ion Physics/Hot and Dense QCD
The Relativistic Heavy Ion Collider at Brookhaven National Laboratory was designed to explore the confinement to de-confinement transition in QCD at high temperatures and low baryon densities. Results from the RHIC program have provided overwhelming circumstantial evidence for the formation of quark gluon plasma in nuclear collisions at RHIC. Estimates obtained from several different RHIC...
Mike Strang
(Ohio State University)
30/07/2009, 14:00
Electroweak Physics [W/Z]
We present high statistics measurements of diboson production in ppbar
collisions at the D0 experiment in multiple channels, including
WW -> lvlv, WW/Z-> lvjj and WZ->lvll. These measurements both test
physics beyond the standard model and demonstrate the sensitivity of
hadron colliders to rare signals such as Higgs boson production.
Prof.
Kara Hoffman
(UMD)
30/07/2009, 14:00
Neutrino Physics
The search for astrophysical neutrinos has given rise to a new generation of neutrino telescopes of an unprecedented scale, including IceCube, ANTARES and ANITA. While these instruments are, first and foremost, astronomical observatories, they also occupy a unique niche in the field of particle physics. These detectors may offer a glimpse of high energy neutrinos that reach us over...
Mr
Kirill Melnikov
(Johns Hopkins University)
30/07/2009, 14:00
Perturbative and Non-perturbative QCD
I will describe recent developments in perturbative QCD focusing on progress in
understanding one-loop corrections to multi-jet processes.
Dr
Adam Ritz
(U of Victoria)
30/07/2009, 14:00
Low Energy Searches for BSM Physics
Abstract: I will discuss some of the motivations for considering new
physics in a hidden sector, which interacts with the Standard Model
via light GeV-scale mediators. For example, this sector may naturally
contain a dark matter candidate. The focus will be on experimental probes
of the light mediators, primarily through the vector portal -
where a secluded U(1) sector kinetically...
Prof.
Alexey Petrov
(Wayne State University)
30/07/2009, 14:00
Heavy Flavor Physics [bottom, charm, tau]
Dr
Hovanes Egiyan
(CLAS Collaboration)
30/07/2009, 14:00
Hadron Spectroscopy
Following the first observations of the possible $S=+1$ pentaquark state $\Theta^{+}(1540)$, there have been many experiments in various laboratories to verify these results and to search for states which could be associated with other members of the pentaquark antidecuplet. The NA49 collaboration reported the observation of narrow $S=-2$ states with masses about $1860$~GeV showing in the...
Dr
Elizabeth Worcester
(University of Chicago)
30/07/2009, 14:00
CP-violation
We will present the final measurement of the direct CP violation parameter, Re(ϵ′/ϵ),
from the KTeV experiment at Fermilab. We will also describe precision measurements
of the KL -KS mass difference, Δm, the KS lifetime, τS , and the CPT tests, ϕ+− and Δϕ.
These results are based on the full dataset collected by the KTeV experiment at Fermi
National Accelerator Laboratory during 1996,...
Dr
Gabe Shaughnessy
(Northwestern University / Argonne National Laboratory)
30/07/2009, 14:00
Higgs Physics
The Higgs boson is the missing piece of the SM. While the Tevatron and LHC search for the nature of the Higgs, dark matter detection experiments aim to uncover the dark sector. I will review various models that connect these two exciting sectors and discuss their associated signatures.
Jadranka Sekaric
(Florida State University)
30/07/2009, 14:20
Electroweak Physics [W/Z]
We present the first observation of the Zgamma to nunugamma process at the Tevatron at 5.1 standard deviations significance, based on 3.6 fb-1 of integrated luminosity collected with the D0 detector at the Fermilab Tevatron ppbar Collider at sqrt{s} = 1.96 TeV. The measured Zgamma cross section multiplied by the branching fraction of Z to nunu is 32 +- 9 (stat.+syst.) +- 2 (lumi.) fb for the...
Ian Shipsey
(Purdue University)
30/07/2009, 14:24
Heavy Flavor Physics [bottom, charm, tau]
Using the entire CLEO-c psi(3770) --> DDbar event sample, corresponding to an integrated luminosity of 818 pb-1 and approximately 5.2 million DDbar events, we present a study of the decays D0 --> pi- e+ nu, D0 -->
K- e+ nu, D+ --> pi0 e+ nu, and D+ --> K0bar e+ nu. Using a tagged analysis technique, in which one D is fully reconstructed in a hadronic mode, absolute partial rates for...
Mr
Anton Kapliy
(University of Chicago)
30/07/2009, 14:25
Detector Technology and R&D
As the LHC luminosity is ramped up to the design level of 10^34 cm−2 s−1 and beyond,
the high rates, multiplicities, and energies of particles seen by the detectors will pose a
unique challenge. Only a tiny fraction of the produced collisions can be stored on tape and
immense real-time data reduction is needed. An effective trigger system must maintain high
trigger efficiencies for the...
Taekoon Lee
(Kunsan National University)
30/07/2009, 14:25
Hadron Spectroscopy
It is shown that the absence of the long-time potential model prediction of
spin-orbit inversion in heavy-light
mesons can be explained by the chiral radiative
corrections in potential model. Some consequences of the radiative
corrections on the spectrum of P-wave bottom mesons are discussed.
Philip Adamson
(Fermilab)
30/07/2009, 14:30
Accelerator Physics
We report on the current status and future plans of Fermilab's Main Injector.
Jiasen Ma
(The University of Chicago)
30/07/2009, 14:30
Low Energy Searches for BSM Physics
The E391a experiment at the KEK 12 GeV proton synchrotron is the first dedicated experiment for the Kl->pi0nunubar decay. The data is taken during three separate Runs. We just performed a blind analysis on the last Run. With (3.48+-0.25)*10^9 Klong decays, we found no candidate events. An upper limit of 6.8*10^-8 was set on the branching ratio for the decay at the 90% confidence level.
Dr
Steven Blusk
(Syracuse University)
30/07/2009, 14:30
CP-violation
LHCb is an experiment which has been designed to make precise measurements of CP violating quantities in B-hadron decays. The scope and experimental challenges of this programme are outlined. Our knowledge of the unitarity triangle will be improved significantly with respect to the present status. In particular, the precision on the angle gamma is expected to improve dramatically. Comparison...
Dr
Anupama Atre
(Fermilab)
30/07/2009, 14:30
Neutrino Physics
The Majorana nature of neutrinos can be experimentally verified only via lepton-number violating processes involving charged leptons. The unambiguous signal of Majorana neutrinos can be probed in many low energy experiments such as study of beta decay spectra, accelerator based experiments such as decays of taus and mesons and collider experiments with direct production and decay. These decays...
Dr
Haijun Yang
(University of Michigan)
30/07/2009, 14:35
We report results of a study of the SM Higgs discovery potential through
the W-pair leptonic decay modes at the LHC with ATLAS detector. We used
MC samples with full detector simulation and reconstruction of the ATLAS
experiment to estimate the ATLAS detection sensitivity for the reaction of
pp->H->WW->ll nu nu. We first conducted a cut-based analysis, and then
performed multivariate...
Dr
Alexander Glazov
(DESY)
30/07/2009, 14:35
Perturbative and Non-perturbative QCD
Recent results from the H1 and ZEUS experiment at HERA will be presented.
James Linnemann
(Michigan State University)
30/07/2009, 14:40
Beyond the Standard Model
We present the results of a broad search for indications of new physics at
the electroweak scale. We examine an exposure of 1 fb-1 to pbar p
interactions at the Fermilab Tevatron at sqrt(s)=1.96 TeV collected by the
D0 detector. We concentrate on final states involving leptons, but the
searches are done in a model independent way. We analyze the data for
deviations from the...
Martina Hurwitz
(University of Chicago)
30/07/2009, 14:40
Electroweak Physics [W/Z]
We present a search for WW plus WZ production in the lepton plus missing transverse energy plus two jets channel at CDF. A matrix element technique is employed to separate the signal from the large W plus jets background. The WW plus WZ production cross section is measured and compared against the standard model NLO prediction.
Rajan Gupta
(Los Alamos National Lab)
30/07/2009, 14:45
Heavy Ion Physics/Hot and Dense QCD
This talk will summarize the results obtained by the HotQCD collaboration on the equation of state and the crossover transition in 2+1 flavor QCD. We will present results on bulk thermodynamic quantities - energy density, pressure, entropy density, and the speed of sound over the temperature range 140 < T < 540 MeV. These results have been obtained on lattices of temporal size $N_\tau = 6$...
Mr
Soohyung Lee
(Korea University)
30/07/2009, 14:48
Heavy Flavor Physics [bottom, charm, tau]
We study the decay properties of the D_s^+ using a large data sample collected by the Belle detector at the KEKB asymmetric energy $e^+ e^-$ collider. Measurements of the relative branching fractions of K_S pi and K_S K
states and the observation of the doubly Cabibbo-suppressed decay Ds+ -> K+K+pi- are presented.
Igor Gorelov
(Department of Physics and Astronomy, Univ. of New Mexico, USA)
30/07/2009, 14:50
Detector Technology and R&D
We will describe the principles of radiation damage monitoring using
the current measurements of the pixel sensors to be provided by the
circuits of ATLAS Pixel Detector HVPP4 System. The dependence of the
leakage current with respect to an integrated luminosity at several
temperature scenarios will be presented. Based on the analysis we
have evaluated the sensitivity...
Liaoyan Dong
(SLAC)
30/07/2009, 14:50
Hadron Spectroscopy
We present a Dalitz-plot analysis of charmless B+/- decays to the final state
pi+-pi+-pi-+ using a sample of (465+-5)x10^-6 BBbar pairs collected by the BABAR
experiment at \sqrt{s} = 10.58 GeV. We measure the branching fractions and direct
CP asymmetries of B+/- to rho0pi+/-, f2(1270)pi+/- and non-resonant pi+pi-pi+/-.
Emily Thompson
(University of Massachusetts)
30/07/2009, 15:00
Beyond the Standard Model
The Standard Model has been successful in describing many fundamental aspects of particle physics. However, there are some remaining puzzles which are not explained within the context of its present framework. We discuss the possibility to discover new physics in the ATLAS Detector via a four-fermion contact interaction, much in the same way Fermi first described Weak interactions. Using a...
Jennifer Pursley
(Wisconsin)
30/07/2009, 15:00
Electroweak Physics [W/Z]
We present the first observation in hadronic collisions of the electroweak production of vector boson pairs (VV, V=W,Z) where one boson decays to a dijet final state. The data correspond to 3.5 fb^-1 of integrated luminosity of p-pbar collisions at sqrt(s)=1.96 TeV collected by the CDF II detector at the Fermilab Tevatron. Event selection requires two jets and large transverse momentum...
Dr
Alexey Drozdetskiy
(University of Florida)
30/07/2009, 15:00
Higgs Physics
We present an evaluation of the CMS expected 95\% C.L. exclusion limits in early Higgs boson searches. The results are based on a statistical combinations of multiple recent Monte-Carlo analyses: $H\to WW^*\to 2l 2\nu$ and $H\to ZZ^*\to 4l$ decay channels, where $l$ stands for $e$ or $\mu$. We show that these two channels alone should allow for excluding the Standard Model Higgs boson in the...
Samina Masood
(Univ. of Houston Clear Lake)
30/07/2009, 15:00
Neutrino Physics
A massive neutrino can couple with the external magnetic field through its mass. A massive neutrino has a very tiny magnetic moment and is extremely insignificant for astrophysics and cosmology. However, the finite temperature and density effects of the background increase the magnetic moment of neutrino to a desired value. We compare the background effect on the magnetic moment of neutrino...
Prof.
Kay Kinoshita
(University of Cincinnati)
30/07/2009, 15:00
CP-violation
The Belle detector at the KEKB electron-positron collider has collected nearly 1~ab$^{-1}$ of data in its decade of operation. The KEKB group has proposed Super-KEKB, an upgrade of KEKB to increase the luminosity by two orders of magnitude during a three-year shutdown, with an ultimate goal of 8 x 10^35/cm^2/s luminosity. To exploit the improved luminosity, an upgrade of the Belle detector...
Dr
Ronald Moore
(Fermi National Accelerator Laboratory)
30/07/2009, 15:00
Accelerator Physics
The Tevatron proton-antiproton collider at Fermilab continues operation as the world's highest energy particle accelerator by delivering luminosity at a center-of-mass energy of 1.96 TeV. We review recent performance and plans for the remainder of Run 2.
Dr
Monica Tecchio
(University of Michigan)
30/07/2009, 15:00
Low Energy Searches for BSM Physics
The goal of the K0TO experiment at J-Parc is to discover and measure
the rate of the rare decay of the neutral KL into pi0 nu nubar .
This flavor changing neutral current decay
proceeds through second-order weak interactions.
Other, as yet undiscovered particles, which can mediate the decay could
provide an enhancement to the branching ratio,
which in the Standard Model predicted...
Prof.
Nikolaos Kidonakis
(Kennesaw State University)
30/07/2009, 15:10
Perturbative and Non-perturbative QCD
I present results for two-loop soft anomalous dimensions, which
are derived from dimensionally regularized diagrams with eikonal
quark lines and control soft-gluon emission in hard-scattering processes.
Detailed results for the UV poles of the eikonal integrals will be
shown for massive quarks, and the massless limit will also be taken.
The construction of soft anomalous dimensions at...
David Cinabro
(Wayne State University)
30/07/2009, 15:12
Heavy Flavor Physics [bottom, charm, tau]
We report recent results on hadronic decays of D0, D+, and Ds mesons. Results include branching fractions for D0, D+, and Ds decays to two pseudoscalars; the first measurements of absolute branching fractions for Ds decay; exclusive Ds --> omega X decays; inclusive hadronic Ds decays; and Dalitz analyses of Ds --> K+ K- pi+ and D+ --> K+ K- pi+ decays.
Prof.
Sergei Voloshin
(Department of Physics and Astronomy-College of Science-Wayne Sta)
30/07/2009, 15:15
Heavy Ion Physics/Hot and Dense QCD
Recent developments in the field of anisotropic flow, measurements
and interpretations, are reviewed with an emphasis on relation
to the bulk properties of the medium.
Warren James Clarida
(Physics and Astronomy Department - University of Iowa)
30/07/2009, 15:15
Detector Technology and R&D
The Compact Muon Solenoid (CMS) detector is in the planning phase of a major upgrade in preparation for the upgrade of the Large Hadron Collider (LHC) to the Super-LHC (SLHC). The SLHC will feature a significant increase in the instantaneous luminosity, leading to up to 200 collisions per interaction. In addition, the sustained radiation from the initial phase of LHC operations will...
Ia Iashvili
(SUNY at Buffalo)
30/07/2009, 15:20
Electroweak Physics [W/Z]
We present the latest results on the production of WW, WZ, W gamma, Z gamma
and ZZ events at the Fermilab Tevatron Collider. The results are based on the analyses
of a few fb^-1 of data collected in p pbar collisions at center of mass energy of 1.96TeV
by CDF and DO experiments during the Tevatron RunII. Analyses of the diboson production
processes provide crucial test of the Standard...
Ms
Isabel Pedraza
(High Energy Physics-Department of Physics-University of Wisconsi)
30/07/2009, 15:20
Beyond the Standard Model
The discovery potential for a heavy new resonance decaying into
di-lepton pairs, or into a high pT lepton and missing ET, using the
ATLAS detector at the LHC is presented. Due to the simplicity and
robustness of the the di-lepton (or lepton+ETmiss) final states, they
are ideal channels in which to search for new physics. The
unprecedented center-of-mass energy available at the LHC allows...
Mark Pitt
(Virginia Tech)
30/07/2009, 15:20
Neutrino Physics
Mark Pitt, Virginia Tech, on behalf of the LENS Collaboration
The Low-Energy Neutrino Spectroscopy (LENS) experiment is designed to precisely measure in real time
the spectral flux of the low energy solar neutrinos (pp, $^7$Be, pep, and CNO, comprising > 99% of the solar neutrino flux)
via charged-current capture on indium-115 (with a threshold of 114 keV). LENS will allow a comparison...
Prof.
John Conway
(University of California, Davis)
30/07/2009, 15:25
Higgs Physics
We present searches for non-standard model Higgs boson production using the latest amount of data collected by the CDF detector at the Fermilab Tevatron. Supersymmetric extensions of the standard model can yield enhanced production of a neutral MSSM Higgs boson, A, according to the parameter tan(Beta). We search for an A decaying to tau leptons, and set exclusion regions in the tan(Beta)...
Dr
Vladimir Nagaslaev
(Fermi National Accelerator Laboratory)
30/07/2009, 15:30
Accelerator Physics
Dr
Simone Stracka
(Babar Collaboration)
30/07/2009, 15:30
CP-violation
Measurements of alpha in Babar
Dr
Giulio Saracino
(Univ. Degli Studi di Napoli Federico II)
30/07/2009, 15:30
Low Energy Searches for BSM Physics
The NA62 experiment is designed to measure the BR of the very rare kaon decay K+->pi+nu nubar collecting order 100 events with 10% of background in two years of data taking. The poor current experimental knowledge of this decay, based on 7 events collected by the E787/949 experiments, from one side, and the good theoretical prediction on the other side, make this new measurement very...
Dr
Bennie Ward
(Baylor University)
30/07/2009, 15:35
Perturbative and Non-perturbative QCD
In the context of HERWIG6.5, we present Monte Carlo data showing the comparison between the parton shower generated by the standard DGLAP-CS kernels and that generated by the new IR-improved DGLAP-CS kernels recently developed by one of us(BFLW). This is done by implementing the new kernels in HERWIG6.5 to generate a new MC, HERWIRI1.0, for hadron-hadron interactions at high energies. Possible...
Atsuko Kibayashi
(Okayama University)
30/07/2009, 15:40
Neutrino Physics
Modification of large water Cherenkov detectors by addition of gadolinium has been proposed. The large cross section for neutron capture on Gd will greatly improve the sensitivity to antielectron neutrinos from supernovae and reactors. A five-year project to build and develop a prototype detector based on Super-Kamiokande (SK) has been approved. We are performing various studies, including a...
Selda Esen
(Department of Physics-Brown University-Unknown)
30/07/2009, 15:40
Beyond the Standard Model
We present a search for extra dimensions in the diphoton channel using the CMS detector at the Large Hadron Collider. The search is focused on the forthcoming 2009--2010 run at 10 TeV center-of-mass energy and $\sim 100~\pbinv$ of data. We discuss event selection and optimization, as well as data-driven methods of estimating various backgrounds and efficiencies. The dominant source of...
Denes Molnar
(Purdue University and RIKEN BNL Research Center)
30/07/2009, 15:45
Heavy Ion Physics/Hot and Dense QCD
The past couple years have seen a lot of progress in the application of
causal dissipative hydrodynamics to model heavy-ion collisions at the
Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory.
These advances benefited greatly from breakthrough results obtained in the
gravity (AdS/CFT) dual of theories based on N=4 supersymmetric Yang-Mills.
2+1D viscous...
Prof.
K.K. Gan
(The Ohio State University)
30/07/2009, 16:15
Detector Technology and R&D
We have designed several ASICs for the optical link upgrades of the new silicon trackers of the ATLAS experiment at the planned upgrades of the LHC, CERN. The ASICs include a high-speed driver for VCSELs, a receiver/decoder for the signal received at the PIN diode, and a clock multiplier to produce a higher frequency clock to serialize the data for transmission. These chips were designed using...
Yaquan Fang
(University of Wisconsin)
30/07/2009, 16:20
Perturbative and Non-perturbative QCD
The large production rate of jets and photons at the LHC will provide
an ideal opportunity for testing perturbative QCD, for constraining the gluon
parton density function, as well as for searching for new physics. The finely
segmented calorimeters, together with an efficient tracking system, allows
for precision measurements of photons and jets. In this presentation, the
di-jet,...
Dr
Paolo Gandini
(Babar Collaboration)
30/07/2009, 16:30
CP-violation
Dr
Vaia Papadimitriou
(Fermilab)
30/07/2009, 16:30
Hadron Spectroscopy
Experimental Review of the Hadron Spectroscopy Session
Leo Bellantoni
(Fermilab)
30/07/2009, 16:30
Low Energy Searches for BSM Physics
This presentation will report on the first experimental search for KL -> pi0 pi0 μ+μ− based on data collected by the KTeV Experiment at the Fermi National Accelerator Laboratory in Batavia, Illinois. Although this decay mode is possible within the Standard Model the rate is suppressed by the very limited phase space. The HyperCP Experiment has recently observed three Sigma+ -> p+μ+μ− events...
Warren James Clarida
(Physics and Astronomy Department - University of Iowa)
30/07/2009, 16:30
Beyond the Standard Model
The Standard Model can be extended to include massive neutrinos as observed in the recent oscillation experiments. Perhaps the most commonly studied model is the type-I seesaw mechanism. This model introduces a new neutrino with a Majorana nature with an unknown mass. In this study we present the potential for the discovery of a Majorana neutrino during the first year of data collection from...
Prof.
Flera Ritzadinova
(Oklahoma State University)
30/07/2009, 16:35
Higgs Physics
We report on a search for charged Higgs bosons in the mass range
80 < m_H+ < 155 GeV in decays of top quark pairs in ppbar collisions
at sqrt{s}=1.96 TeV. It has been performed using ~1 fb-1 of data
collected with the D0 detector at the Fermilab Tevatron collider. The
search is based on the analysis of ttbar production rates in the final
states with two isolated leptons (electrons or...
Waruna Fernando
(The Ohio State University)
30/07/2009, 16:40
Detector Technology and R&D
We investigate the feasibility of using VCSEL and PIN for the optical links at the silicon trackers of the ATLAS experiment at the planned upgrades of the LHC, CERN. We irradiated VCSEL and PIN with 24 GeV/c protons at CERN up to the equivalent SLHC fluence of 2.6 x 10^15 p/cm2, including a 50% safety factor. The GaAs VCSEL arrays were fabricated by Optowell and Advanced Optical Component...
Dmitry Bandurin
(Kansas State University)
30/07/2009, 16:45
Perturbative and Non-perturbative QCD
A sample of photon plus 3-jet events collected in the D0 experiment
with an integrated luminosity of 1fb-1 is used to determine the fraction
of the events with double parton (DP) scattering fDP in a single ppbar
collision at sqrt(s)=1.96TeV. The events are selected with photon
candidate transverse momentum between 60 and 80GeV, leading jet pT above
25GeV and two additional jets with...
Kevin Dusling
(Brookhaven National Laboratory)
30/07/2009, 16:45
Heavy Ion Physics/Hot and Dense QCD
This work investigates the consequence of the non-equilibrium phase space distribution on elliptic flow and particle spectra using a viscous hydrodynamic simulation. First, we show how various models of energy loss lead to different viscous corrections to spectra and make a connection between the shear viscosity coefficient and the transport parameter q-hat. The off-equilibrium distribution...
Stephen Godfrey
(Carleton University)
30/07/2009, 16:50
Beyond the Standard Model
s-channel resonances are predicted by many models of Physics Beyond the Standard Model and it is quite possible that such an object will be discovered in the early years of the LHC program. If this occurs, the task will be to understand its origins. I will describe various diagnostic measurements to study Z' 's including some new observables we have proposed that can distinguish between...
Dr
Richard Kass
(Ohio State University)
30/07/2009, 16:50
CP-violation
We report a search for the decays B- --> D0 K-
and B- --> D*0 K- and their charge conjugates
where the flavor of the neutral D0 meson is ambiguous.
The final state particles for the D0 K- and D*0 K- modes are
[K+ pi-] K- and ([K+ pi-] pi0) K- or ([K+ pi-] gamma) K-
respectively. These decays are sensitive to the CKM angle gamma due to
interference between the b --> c and b --> u...
Yury Kolomensky
(UC Berkeley/LBNL)
30/07/2009, 16:55
Low Energy Searches for BSM Physics
The nature of dark matter is a challenge to both astrophysics and
collider physics. Dark matter may have both heavy and light
constituents, much like the normal matter described by the Standard
Model. We present a search for decay of the Y(1S) meson into undetectable
final states, using a sample of 98 million Y(3S) mesons collected at
the PEP-II/BaBar B-factory. We tag the decay of the...
Dr
Trevor Vickey
(High Energy Physics-Department of Physics-University of Wisconsi)
30/07/2009, 17:00
Higgs Physics
The discovery of a neutral Higgs boson with large branching fractions
into tau or muon pair final states would be strong evidence of new
physics beyond the Standard Model, as would the discovery of a charged
Higgs boson. The discovery potential for neutral and charged Higgs
bosons in the Minimal Supersymmetric Extension of the Standard Model
(MSSM) with the ATLAS detector at the LHC is...
Dr
Mitchell Soderberg
(Yale University)
30/07/2009, 17:05
Detector Technology and R&D
Liquid Argon Time Pro jection Chamber (LAr TPC) detectors are
ideally suited for studying neutrino interactions and probing the pa-
rameters that characterize neutrino oscillations. The ability to drift
ionization particles over long distances in purified argon and to trigger
on abundant scintillation light allows for excellent particle identifica-
tion and triggering capability. In...
Eric Swanson
(University of Pittsburg)
30/07/2009, 17:05
Hadron Spectroscopy
Theory review of the Hadron Spectroscopy session
Dr
Don Lincoln
(Fermilab)
30/07/2009, 17:10
Perturbative and Non-perturbative QCD
We present the first measurement of dijet angular distributions
in Run II of the Fermilab Tevatron Collider. The measurement is
based on a dataset, corresponding to an integrated luminosity of
approx 0.7 fb-1 taken with the D0 detector. Shapes of dijet angular
distributions have been measured over a range of dijet masses,
from 0.25 TeV and beyond 1TeV. The data are in good agreement...
Marc-Olivier Bettler
(Laboratoire de Physique des Hautes Energies (LPHE-IPEP))
30/07/2009, 17:10
Beyond the Standard Model
The LHCb experiment will in the first run of LHC obtain more B-meson decays than has been recorded by any other experiment previously. This provides a unique opportunity for studying very rare decays where the effects of physics beyond the Standard Model might be dominating. The decay Bs -> mu+ mu- is very sensitive to an extended Higgs sector and might be the first place to see the effects of...
Dr
Simone Stracka
(Babar Collaboration)
30/07/2009, 17:10
CP-violation
Two- and Three-body charmless B decays at BaBar
Huichao Song
(The Ohio State Univ)
30/07/2009, 17:15
Heavy Ion Physics/Hot and Dense QCD
The viscosity of the QGP is a presently hotly debated subject.
Since its computation from first principles is difficult, it is desirable
to try to extract it from experimental data. Viscous hydrodynamics
provides a tool that can attack this problem and which may work in regions
where ideal hydrodynamics begins to fail.\\
Through the efforts of different groups, the elliptic flow has...
Elisa Guido
(University & INFN Genova)
30/07/2009, 17:20
Low Energy Searches for BSM Physics
Using a sample of 122 million Upsilon(3S) decays collected with the
BaBar detector at the PEP-II asymmetric energy collider at the
Stanford Linear Accelerator Center, we measure the ratio
R = BR(Upsilon(1S) --> tautau)/BR(Upsilon(1S) --> mumu); the
measurement is intended as a test of the lepton universality and
as a possible search for a light pseudoscalar Higgs boson in...
Dr
German Carrillo-Montoya
(University of Wisconsin, Madison)
30/07/2009, 17:25
Higgs Physics
The search for the Higgs boson is a crucial element of the
physics program of the LHC. This talk will give an overview of the Standard Model Higgs boson searches under study within ATLAS, with an emphasis on
background normalization strategies. Special attention will be given
to the search for Higgs bosons in the H->WW decay mode, since this
channel is of particular interest for the...
Kurtis Nishimura
(University of Hawaii)
30/07/2009, 17:30
CP-violation
The loops involved in $b \to s$ penguin transitions provide sensitivity for precision tests of the Standard Model and searches for new physics. We present measurements of inclusive and exclusive radiative and electroweak B decays from the Belle detector, located at the KEKB asymmetric $e^+e^-$ collider, which has collected the world's largest sample of data at the $\Upsilon(4S)$ resonance.
Dmitriy Beznosko
(NN Group SUNYSB)
30/07/2009, 17:30
Detector Technology and R&D
T2K is Tokai to Kamioka long baseline neutrino oscillation experiment (Japan). The goal of the experiment is to measure theta13 neutrino oscillation parameter by nu-e appearance from nu-mu beam. The near off-axis detector, ND280, consists of several sub-detectors in 0.2T magnetic field, with photon readout scheme. This necessitates usage of the efficient, high performance photon detector that...
Dr
Erin De Pree
(St. Mary's College of Maryland)
30/07/2009, 17:30
Beyond the Standard Model
Since the discovery of neutrino mass, the possibility of a fourth generation of particles has reemerged. Electroweak precision measurements force the fourth generation to have non-degenerate masses which is consistent with the three standard generations. We present the possibilities of detecting fourth generation top quark in several theories beyond the Standard Model, including warped extra...
Sabine Lammers
(Indiana University)
30/07/2009, 17:35
Perturbative and Non-perturbative QCD
We present measurements of differential cross sections in
inclusive Z/gamma plus jet production in a data sample of
1fb-1 collected with the D0 detector in proton antiproton
collisions at sqrt(s)=1.96TeV. Measured variables include
the Z/gamma transverse momentum (pT-Z), and rapidity (y-Z),
the leading jet pT (pT-jet), and rapidity (y-jet), as well
as various angles of the Z+jet...
Chris Herzog
(Princeton University)
31/07/2009, 10:00
Mirjam Cvetic
(University of Pennsylvania)
31/07/2009, 11:00
James Brau
(University of Oregon)
31/07/2009, 11:30
Dr
kwangwoo park
(southern methodist university)
31/07/2009, 14:00
Electroweak Physics [W/Z]
The $W$ boson mass extracted by the NuTeV collaboration from the ratios of neutral and charged-current neutrino and anti-neutrino cross sections differs from direct measurements performed at LEP2 and the Fermilab Tevatron by about $3 \sigma$. Several possible sources for the observed difference have been discussed in the literature, including new physics beyond the Standard Model (SM)....
Mr
Chanaka De Silva
(Wayne State University)
31/07/2009, 14:00
Heavy Ion Physics/Hot and Dense QCD
Two particle correlation measurements at RHIC have shown an extended near side delta eta correlation in heavy-ion collisions relative to p+p for both momentum triggered and untriggered analyses. This phenomenon is also known as the "ridge". An investigation into the momentum dependence of two particle correlations is presented for Cu+Cu 200 GeV collisions from the STAR experiment. We extract...
Bing An Li
(University of Kentucky)
31/07/2009, 14:00
Perturbative and Non-perturbative QCD
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\maketitle
In this talk a new...
Dr
Jason Detwiler
(Lawrence Berkeley National Laboratory)
31/07/2009, 14:00
Neutrino Physics
I will review the current status and outlook of prominent non-oscillation neutrino physics experiments, including neutrinoless double-beta decay searches and kinematic measurements of neutrino mass.
Prof.
Markus Luty
(UC Davis),
Markus Luty
(University of California Davis)
31/07/2009, 14:00
Beyond the Standard Model
The large hadron collider will begin physics operation late this year,
and will provide a decisive test of more than 30 years of building
models for physics beyond the standard model. This talk will
critically review the case for physics beyond the standard model
arising from present-day data, and ways of distinguishing them at the
LHC. Emphasis will be placed on strong electroweak...
Swagato Banerjee
(University of Victoria)
31/07/2009, 14:00
Low Energy Searches for BSM Physics
We present a search for the non-conservation of lepton flavor in the
decay tau -> mu/e gamma performed with 967 M tau decays from e+e-
annihilations collected by the BABAR detector at the PEP-II storage
ring at a center-of-mass energy corresponding to Y(2S), Y(3S) and
Y(4S) resonances.
Prof.
Klaus Honscheid
(Ohio State University)
31/07/2009, 14:00
Detector Technology and R&D
The discovery that the universe is accelerating, not slowing down from the mass it contains, is the surprise that sets the initial research program of 21st Century cosmology. The Dark Energy Survey (DES) is a next generation sky survey aimed directly at understanding this mystery. DES is designed to measure the dark energy equation of state parameter with four complementary techniques: galaxy...
Dr
Alexandr Yelnikov
(City College of New York)
31/07/2009, 14:00
Field and String Theory
We carry out further analysis of the Hamiltonian approach to Yang-Mills theory in 2+1 dimensions which helps to place the calculation of the vacuum wave function and the string tension in the context of a systematic expansion scheme. The solution of the Schrodinger equation is carried out recursively. The computation of correlators is re-expressed in terms of a two-dimensional chiral boson...
Dr
Andreas Scharf
(University at Buffalo)
31/07/2009, 14:20
Electroweak Physics [W/Z]
Simultaneously with the turning-on of the Large Hadron Collider (LHC) the data taking for jet production rates will start. The study of these production rates is one of the important tests of the Standard Model in the new energy regime available at the LHC. In order to discriminate possible extensions of the Standard Model accurate theoretical predictions are needed. In this talk I will...
Kory Stiffler
(University of Iowa)
31/07/2009, 14:20
Field and String Theory
The gauge/gravity correspondence has provided an avenue where modern superstring theory can come full circle back to nuclear physics.
For an SU(N) gauge theory, certain low energy configurations of mesons with k quarks and k anti-quarks, have been studies in both the Hamiltonian formulation of Yang-Mills and lattice gauge theories. Utilizing the gauge/gravity correspondence of string...
Swagato Banerjee
(University of Victoria)
31/07/2009, 14:20
Low Energy Searches for BSM Physics
Charged lepton-flavor violating (CLFV) processes are extremely rare in
the Standard Model, but they may occur in various beyond-the-Standard
Model (BSM) theories, including SUSY or models with leptoquarks or
compositeness. We present a search CLFV decays Upsilon --> e+ tau- and
Upsilon --> mu+ tau- which probes BSM contributions at the TeV
mass scales.
Zijin Guo
(Johns Hopkins University)
31/07/2009, 14:25
Detector Technology and R&D
The BaBar Silicon Vertex Tracker (SVT) is a five-layer double-sided silicon
detector designed to provide precise measurements of the position and
direction of primary tracks, and to fully reconstruct low-momentum tracks
produced in e+e- collisions at the PEP-II asymmetric collider at SLAC. This
presentation will describe the design, implementation, performance, and
validation of the local...
Mr
George Moschelli
(Wayne State University)
31/07/2009, 14:25
Heavy Ion Physics/Hot and Dense QCD
Jet correlation measurements at RHIC show a striking increase in the yield of associated particles in a narrow range in relative azimuthal angle near $\phi\approx 0$. This region of enhanced particle production is called a ridge because it extends over a broad range in relative pseudorapidity. Interestingly, a similar `soft' ridge of enhanced production has been reported for two-particle...
doug toussaint
(University of Arizona)
31/07/2009, 14:25
Perturbative and Non-perturbative QCD
We use lattice gauge theory including the effects of light and strange
dynamical quarks to calculate the "strange quark content of the nucleon",
<N| s s_bar |N>, which is important for interpreting
the results of some dark matter detection experiments. The method
is to evaluate quark-line disconnected correlations on the MILC
lattice ensembles, which include the effects of dynamical...
Nicole Ackerman
(SLAC)
31/07/2009, 14:30
Neutrino Physics
EXO-200 is the first phase of the Enriched Xenon Observatory (EXO) experiment, which searches for neutrinoless double beta decay in Xe-136 to measure the mass and probe the Majorana nature of the neutrino. EXO-200 consists of 200 kg of liquid Xe enriched to 80% in Xe-136 in an ultra-low background TPC. Energy resolution is enhanced through the simultaneous collection of scintillation light...
Edwin Barnes
(University of Virginia)
31/07/2009, 14:40
Field and String Theory
We extend the analysis of Alday and Maldacena for obtaining gluon scattering amplitudes at strong coupling to include massive quark scattering. Our quarks are actually the N=2 hypermultiplets which arise when D7-brane probes are included in the AdS_5 x S^5 geometry. We first derive appropriate massive-particle boundary conditions for the string scattering worldsheets. We then find an exact...
Trang Hoang
(Florida State University)
31/07/2009, 14:40
Electroweak Physics [W/Z]
We present a measurement of the forward-backward charge asymmetry (AFB)
for di-electron produced via an intermediate Z/gamma*$
boson using about 3.6 fb-1 of data. These data were collected by
the D0 detector in ppbar collisions at sqrt{s}=1.96 TeV. We also
present a measurement of the effective weak mixing angle using the
measured AFB distribution.
Sergey Uzunyan
(Northern llinois University)
31/07/2009, 14:40
Beyond the Standard Model
We report on searches for the production of scalar and vector
leptoquarks in ppbar collisions at the Tevatron collider,
which are based on integrated luminosities of up to
2.5 fb-1 collected with the DO detector. Leptoquarks,
which are predicted by several extensions of the Standard
Model, are hypothetical particles carrying both lepton and
quark flavors. At hadron colliders they can...
Dr
Jennifer Kile
(Brookhaven National Lab)
31/07/2009, 14:45
Low Energy Searches for BSM Physics
We study, in a model-independent analysis, the possibility of direct detection of light fermionic dark matter in neutrino experiments. We consider all operators of dimension six or lower which can contribute to the process f p -> n e+, where f is a dark fermion, and place constraints on their coefficients via the dark matter lifetime. We then discuss limits on these interactions from...
Kurtis Nishimura
(University of Hawaii)
31/07/2009, 14:50
Detector Technology and R&D
Super B factories that will perform precision tests of the flavor sector of the Standard Model and searches for new physics will demand excellent charged particle identification (PID), particularly K/π separation, for momenta up to 4 GeV/c, as well as the ability to operate under beam backgrounds significantly higher than current B factory experiments. We describe an Imaging...
Dr
Jiangyong Jia
(Brookhaven National Laboratory (BNL) and Stony Brook University)
31/07/2009, 14:50
Heavy Ion Physics/Hot and Dense QCD
Measurements from RHIC at intermediate $p_T$ of 2-6 GeV/c revealed many features in various single particle and two particle correlation observables. These measurements not only suggest the leading roles of collective flow and jets in this $p_T$ region, but also establish a strong and sophisticated coupling between the two. Experimental results are discussed in the hope to elucidate the...
Prof.
Mike Sokoloff
(University of Cincinnati)
31/07/2009, 14:50
Perturbative and Non-perturbative QCD
Two-photon processes produced at e+e- colliders via the reaction e+ e-
--> e+ e- gamma gamma(*) --> e+ e- X, provide important experimental
data for the study of hadronic spectra and testing QCD predictions.
We report here on recent results in a number of these channels that are
obtained at the PEP-II collider with the BABAR detector. The gamma
gamma --> pi0pi0, pi0eta, and etaeta cross...
Larissa Ejzak
(University of Wisconsin-Madison)
31/07/2009, 14:50
Neutrino Physics
Understanding the nature of neutrino masses will require physics beyond the long-standing Standard Model of particle physics. Neutrinoless double beta decay (0νββ) experiments like the Cryogenic Underground Observatory for Rare Events (CUORE) are uniquely suited for probing the remaining mysteries of neutrino mass, particularly the question of the neutrino’s Majorana nature. CUORE will be a...
Mr
Vikas Bansal
(Department of Physics and Astronomy-University of Pittsburgh-Unk)
31/07/2009, 15:00
Beyond the Standard Model
Dilepton-jet final states are used to study physical phenomena not predicted by the standard model. ATLAS discovery potential to leptoquarks and Majorana neutrinos is presented with fully-simulated ATLAS detector at the Large Hadron Collider (LHC) at
CERN. The study is motivated by the role of the leptoquark in the Grand Unification of fundamental forces and the see-saw mechanism that...
Mr
James Alsup
(University of Tennessee)
31/07/2009, 15:00
Field and String Theory
We discuss the derivation of dissipative Bjorken hydrodynamics from a Schwarzschild black hole in asymptotically AdS spacetime of arbitrary dimension in the limit of large longitudinal proper time $\tau$. Using an appropriate slicing near the boundary, we calculate the Schwarzschild metric to next-to-next-to-leading order in the large $\tau$ expansion as well as the dual stress-energy tensor...
Michael Marino
(University of Washington)
31/07/2009, 15:10
Neutrino Physics
The observation of neutrinoless double-beta decay would establish that the
neutrino is a Majorana particle, would help determine the absolute mass scale
of the neutrino, and could provide insight into understanding
lepton-number-violating processes. The Majorana Collaboration plans to search
for this process in 76Ge using high-purity germanium detectors in an
ultra-low-background...
Prof.
Kay Kinoshita
(University of Cincinnati)
31/07/2009, 15:15
Detector Technology and R&D
The Belle detector at the KEKB electron-positron collider has collected nearly 1~ab$^{-1}$ of data in its decade of operation. The KEKB group has proposed Super-KEKB, an upgrade of KEKB to increase the luminosity by two orders of magnitude during a three-year shutdown, with an ultimate goal of 8 x 10^35/cm^2/s luminosity. To exploit the improved luminosity, an upgrade of the Belle detector...
Taekoon Lee
(Kunsan National University)
31/07/2009, 15:15
Perturbative and Non-perturbative QCD
We show that the Borel resummed perturbative contribution of the stochastic
perturbation theory and dimension-4 gluon condenstate can acccount for the
average plaquette data, and the resulting gluon condensate of the
$\text{SU}(3)$ pure Yang-Mills theory is determined to be
$\langle \frac{\alpha_s}{\pi} GG \rangle\approx0.13\,\, {\rm GeV}^4$.
A critical review of the existing procedure...
Kate Scholberg
(Duke University)
31/07/2009, 15:15
Low Energy Searches for BSM Physics
The Spallation Neutron Source in Oak Ridge, Tennessee, is designed to produce intense pulsed neutrons for various science and engineering applications. Copious neutrinos are a free by-product. When it reaches full power in 2009, the SNS will be the world's brightest source of neutrinos in the few tens of MeV range. The proposed CLEAR (Coherent Low Energy A (Nuclear) Recoils) experiment...
Dmitri Smirnov
(Notre Dame)
31/07/2009, 15:20
Beyond the Standard Model
We report on searches for a compositeness signature of quarks
and leptons in the di-fermion (di-leptons and di-jets) channels
using data collected by the D0 detector at the Fermilab Tevatron.
We set model-dependent lower limits at the 95% condence level on
the compositeness scale of for constructive and destructive
interference between the Drell-Yan (DY) amplitude and the contact...
Prof.
L.C.R. Wijewardhana
(University of Cincinnati)
31/07/2009, 15:20
Field and String Theory
Black branes are studied in Einstein-Gauss-Bonnet (EGB) gravity. Evaporation drives black branes towards one of two singularities depending on the sign of $\alpha$, the Gauss-Bonnet coupling. For positive $\alpha$ and sufficiently large ratio $\sqrt{\alpha}/L$, where $L/2\pi$ is the radius of compactification, black branes avoid the Gregory-Laflamme (GL) instability before reaching a critical...
Dr
Ivan Vitev
(LANL)
31/07/2009, 15:25
Heavy Ion Physics/Hot and Dense QCD
For jets, with great power comes great opportunity. The unprecedented center of mass energies available at the LHC open new windows on the QGP: we demonstrate that jet shape and jet cross section measurements become feasible as a new, differential and accurate test of the underlying QCD theory. We present a first step in understanding these shapes and cross sections in heavy ion reactions. Our...
Aram Apyan
(Illinois Institute of Technology)
31/07/2009, 15:40
Detector Technology and R&D
Field emission is one of the major problems limiting rf cavity performance in accelerators. Superconducting cavities are made of thin metal shells in a metal liquid helium vessel. This system can be viewed as a Cerenkov radiator between a set of mirrors. Field emitted electrons can punch through the cavity wall and generate Cerenkov light in helium which can be collected by appropriate...
Dr
J. Brian Pitts
(University of Notre Dame)
31/07/2009, 15:40
Field and String Theory
The problem of finding a covariant expression for the distribution and conservation of gravitational energy-momentum dates to the 1910s. A suitably covariant infinite-component localization is displayed, reflecting Bergmann's realization that there are infinitely many gravitational energy-momenta. Initially use is made of a flat background metric (or rather, all of them) or connection,...
Mr
Gagik Yeghiyan
(Wayne State University)
31/07/2009, 15:40
Beyond the Standard Model
We re-examine constraints from the evidence for
observation of the lifetime difference in $D^0$-${\overline D}^0$
mixing on the parameters of supersymmetric models with $R$-parity violation (RPV). We find that RPV SUSY can give large negative contribution to the
lifetime difference. We also discuss the importance of the choice of
weak or mass basis when placing the constraints on...
Daekyoung Kang
(The Ohio State University)
31/07/2009, 15:40
Perturbative and Non-perturbative QCD
The leading-order parton processes that produce a dilepton with large transverse momentum predict that the transverse polarization should increase with the transverse momentum for almost any choice of the quantization axis for the spin of the virtual photon. The rate of approach to complete transverse polarization depends on the choice of spin quantization axis. We propose axes that optimize...
Dr
Christopher Kolda
(U of Notre Dame)
31/07/2009, 16:10
Low Energy Searches for BSM Physics
In many models of physics beyond the Standard Model, it is necessary to suppress new, large sources of flavor-changing neutral currents. One recipe is to demand that the new physics exhibits “minimal flavor violation.” Though this is really a constraint on the quark sector of the theory, it can have strong effects on possible sources of lepton number violation. In particular, it strongly...
Prof.
Joe Kiskis
(UC Davis)
31/07/2009, 16:30
Perturbative and Non-perturbative QCD
Continuum reduction and Monte Carlo simulation are used to calculate the heavy quark potential and the string tension in large N Yang-Mills theory in three and four dimensions in the confined phase. In addition, the spatial string tension in the 2+1 high T phase is also measured. With reduction, the potential can be calculated out to separations larger than the lattice extent.
Prof.
Tulika Bose
(Boston University)
31/07/2009, 16:30
Beyond the Standard Model
A review of the discovery potential of the LHC for exotic phenomena involving complex final states is presented. Topics covered include searches for high mass di-boson resonances, fourth generation quarks, technicolor, black-holes etc. Challenges presented by unconventional final states involving long-lived particles predicted by hidden valley and other models are also discussed. The...
Dr
Sevil Salur
(LBL)
31/07/2009, 16:30
Heavy Ion Physics/Hot and Dense QCD
Full jet reconstruction has traditionally been thought to be difficult in heavy ion events, due to large multiplicity backgrounds. The search for new physics in high luminosity p+p collisions at the LHC similarly requires the precise measurement of jets over large backgrounds due to pile up, and has motivated the development a new generation of jet reconstruction algorithms which are also...
Prof.
Tonnis ter Veldhuis
(Macalester College)
31/07/2009, 16:30
Field and String Theory
Soliton solutions in scalar field theory in an AdS1+1 background are investigated. Analytic soliton solutions are obtained in specific models, and their mass is calculated. The fluctuation spectrum is determined, and the quantum correction to the soliton mass is computed.
Andrew Norman
(Univeristy of Virginia)
31/07/2009, 16:40
Low Energy Searches for BSM Physics
The Mu2e collaboration is proposing to search for coherent, neutrino-less conversion of muons into electrons in the field of a nucleus with a sensitivity improvement of approximately 10,000 over existing limits. Such a lepton flavor-violating reaction probes new physics at a scale unavailable by direct searches at either present or planned high energy colliders. The physics motivation for Mu2e...
Christian Sturm
(Brookhaven National Laboratory)
31/07/2009, 16:55
Perturbative and Non-perturbative QCD
Quark masses are fundamental parameters of QCD. Their accurate
determination is thus a mandatory task. Light quark masses can be
determined non-perturbatively through lattice simulations in a given
renormalization scheme, e.g. a momentum subtraction scheme. The MSbar
scheme is not directly amenable in lattice simulations since it is
closely related to dimensional regularization. To obtain...
Yue Shi Lai
(Columbia University-Unknown-Unknown)
31/07/2009, 17:00
Heavy Ion Physics/Hot and Dense QCD
The Relativistic Heavy Ion Collider uses the collision of heavy nuclei to create a strongly interacting, partonic medium, while the collision of $p + p$ provides a baseline measurement to determine the medium modification effect. Direct jet reconstruction applied to these collision systems offers a crucial constraint on the mechanism for in-medium parton energy loss and jet-medium...
Prof.
G. Bruce Mainland
(The Ohio State University at Newark)
31/07/2009, 17:10
Beyond the Standard Model
To begin exploring the possibility that leptons, quarks, or both, might be highly relativistic bound states, a numerical method for solving two-body, bound-state Bethe-Salpeter equations is discussed. This class of integral equations is difficult to solve, not because the equations are usually non-separable, but rather because it is typically impossible to discretize the equations in such...
Jing Shao
(U of Michigan)
31/07/2009, 17:10
Low Energy Searches for BSM Physics
We demonstrate that in effective theories arising from ${\cal N}=1$ fluxless compactifications of M-theory on a $G_2$ manifold with low energy supersymmetry, CP-violating phases do not appear in the soft-breaking Lagrangian except via the Yukawas. Such a mechanism may be present in other string compactifications as well; we describe properties sufficient for this to occur. CP violation is...
Dr
Anthony Timmins
(Wayne State University)
31/07/2009, 17:30
Heavy Ion Physics/Hot and Dense QCD
We present high p_{T} pion, proton, kaon, and rho spectra measured
with the STAR experiment in p+p and Au+Au collisions at
200 GeV. We find the kaon/pion ratio to be enhanced
in Au+Au 200 GeV collisions relative to p+p 200 GeV collisions at p_T
6 GeV/c. The enhancement persists until p_{T} ~ 11 GeV/c for
central Au+Au 200 GeV collisions. We also show R_{AA} measured at the ...
Prof.
Ernesto Matute
(Universidad de Santiago de Chile)
31/07/2009, 17:30
Beyond the Standard Model
We go beyond the Standard Model guided by presymmetry, the discrete electroweak quark-lepton symmetry hidden by topological effects which explain quark fractional charges as in condense matter physics. Partners of the particles of the Standard Model and the discrete symmetry associated with this partnership appear as manifestations of a residual presymmetry and its extension from matter to...
Prof.
Rainer Fries
(Texas A&M University & RBRC)
31/07/2009, 18:00
Heavy Ion Physics/Hot and Dense QCD
I will discuss some basic ideas about changes in the chemical composition of QCD jets traversing nuclear matter. I will focus in particular on "conversions" of jets in quark gluon plasma and their effect on spectra and azimuthal asymmetries of high-PT hadrons and photons. I discuss possible signatures at RHIC and the LHC heavy ion program and review recent experimental results.
john brandenburg
(Orbital Technologies Corporation)
Beyond the Standard Model
The GEM(Gravity E&M) theory (Brandenburg 2007) is an alloy of the Sahkarov and Kaluza-Klein theories of EM and gravitation and allows the derivation of the Newton Gravitation Constant from first principles, and the two postulates of the GEM theory: 1. that gravity and EM forces, and electrons and protons are unified at the Planck length rP and split apart with the apprearance of a hidden...
The CDF Collaboration
(Various)
Heavy Flavor Physics [bottom, charm, tau]
At first order all b-hadrons have equal lifetimes given by the lifetime of
b-quark. The effects of spectator quark in the hadron then introduces
corrections which yields to differences in the b-hadron lifetimes. The
corrections can be predicted rather precisely and therefore precise
measurements can test our understanding of spectator effects. We report
measurements of lifetimes of B+,...
Dr
Wayne Lundberg
(Architect of Comprehensive Theory)
Beyond the Standard Model
Causal particle theory requires that a particle’s time coordinate be uninvolved with its representative non-commutative matrix algebra. A non-commutative representation algebra has been constructed which both underlies the standard model algebraic group and preserves particle causality. It was proposed that such an algebra be considered –long before the causality criterion was known. As in...
Aurelio Juste
(Fermilab),
Horst Wahl
(Florida State University),
Stefan Soldner-Rembold
(University of Manchester)
Electroweak Physics [W/Z]
We present the direct measurement of trilinear gauge boson couplings
in the WW+WZ ->lvjj final state using proton-anti-proton
collisions at sqrt{s}=1.96 TeV. Analysed data correspond to
1.07 fb-1 of integrated luminosity collected with the D0 detector
at the Fermilab Tevatron. The 95 % C.L. limits are set using two
different relation between the anomalous Z and gamma exchange
terms...
Boaz Klima
(Fermi National Accelerator Lab. (Fermilab)-Unknown-Unknown)
Electroweak Physics [W/Z]
We discuss prospects for studying diboson production at the LHC with the CMS detector
Owen Long
(University of California Riverside)
Hadron Spectroscopy
We perform a study of the exclusive production of Dbar D, Dbar D*,
and D*bar D* in initial-state-radiation events, from e+ e-
annihilations at a center-of-mass energy near 10.58 GeV, to search for
charmonium and possible new resonances. The data sample corresponds to an
integrated luminosity of 384 fb^-1 and was recorded by the BaBar
experiment at the PEP-II storage rings. The Dbar D,...
The CDF Collaboration
(Various)
Heavy Flavor Physics [bottom, charm, tau]
The CDFII detector at the Fermilab Tevatron has now collected more than 5
fb-1 of data, and is the ideal place to search for rare and forbidden heavy
flavor decays. Here we report recent results for rare decays of B and D
hadrons with a lepton pair in the final state.
Owen Long
(University of California Riverside)
CP-violation
We present improved measurements of the
branching fraction, the longitudinal polarization fraction f_L,
and the direct CP asymmetry Acp in the B meson decay channel
B+ --> rho+ rho0. The data sample was collected with the BaBar
detector at SLAC. The results are
BF(B+ --> rho+ rho0) = (23.7 +/- 1.4 +/- 1.4) x 10^-6,
f_L = 0.950 +/-...
Owen Long
(University of California Riverside)
CP-violation
We present updated results from an analysis of B0->rho+rho- decays
using the full Y(4S) data sample collected with the BABAR detector
at the PEP-II asymmetric-energy B Factory at SLAC.
Mohamed Assad Abdel-Raouf
(United Arab Emirates Un iversity, College of Science)
Poster Session
The successful operation of the LHC facilities at CERN and the production of unlimited number of particles and antiparticles at high energies raise the challenging question about the possible cooling of these particles and the enhancement of matter-antimatter physics. Particularly, of great interest is the realization of research channels similar to the "ALPHA" and "ATRAP' experiments. In...
Owen Long
(University of California Riverside)
CP-violation
We present the measurement of the branching fractions of neutral
and charged B meson decays to K1(1270) pi and K1(1400) pi and the
estimation of the weak CKM angle alpha from the B0 decays to
a1(1260) pi. The data sample collected with the BaBar detector at
the PEP-II asymmetric-energy B factory at SLAC represents
465 x10^6 B Bbar pairs.
Owen Long
(University of California Riverside)
CP-violation
We present updated measurements of Branching Fractions for neutral
B meson decays to eta K^0, eta eta, eta' eta', eta phi, eta omega,
eta' phi, eta' omega, and branching fractions and CP-violating charge
asymmetries for charged B decays to eta K^+, eta pi^+, eta' K^+,
and eta' pi^+. The data sample collected with the BaBar detector
at the...
Owen Long
(University of California Riverside)
CP-violation
We present improved measurements of the branching fractions and CP
asymmetries in the decays B+->K+pi0, B+->pi+pi0 and B0->pi0pi0.
This update is based on 467 Y(4S)->BBbar decays, constituting the
complete set of data collected at the Y(4S) resonance by the BaBar
experiment at the SLAC PEP-II B-factory.
We determine constraints on the Unitarity Triangle angle alpha from
the...
Owen Long
(University of California Riverside)
CP-violation
We present an updated measurement of the direct CP asymmetries
A_CP+/- and the ratios of the branching fractions R_CP+/- for
the decay B- --> D0_CP K- and its charge conjugate,
where D0_CP is reconstructed in both non-CP flavor
eigenstates and in CP (even and odd) eigenstates. The analysis
exploits the full data sample collected with the BaBar detector at the
PEP-II e+ e- storage ring,...
Owen Long
(University of California Riverside)
CP-violation
Using 467 million Upsilon(4S) --> B Bbar decays collected
with the BaBar detector at the PEP-II B factory, we report on
improved measurements of the branching fractions of B0bar --> D(*)0 K_S0
along with a measurement of the weak phase 2 beta + gamma obtained from
a time-dependent analysis of the aforementioned decays.
Owen Long
(University of California Riverside)
CP-violation
We present improved measurements of the CP-violating charge asymmetries
and branching fractions in the decays B+ --> K0pi+ and B+ --> K0barK+. The
results are based on all data collected at the Y(4S) resonance by the
BaBar experiment at SLAC. Signal yields and CP-violating asymmetries are
determined simultaneously using kinematic and particle-identification
information in a...
Owen Long
(University of California Riverside)
CP-violation
We present improved measurements of the branching fraction and the
CP-violating parameters S and C in the time evolution of the B0 -->
K0K0bar system based on all data collected at the Y(4S) resonance by the
BaBar experiment at SLAC. Signal yields and CP-violating asymmetries are
determined simultaneously using kinematic and B0 flavor-tagging
information in a multidimensional...
Owen Long
(University of California Riverside)
CP-violation
We present measurements of the CP-violating parameters in the decays B0
--> pi+pi- and B0 --> K+pi- based on all data collected at the Y(4S)
resonance by the BaBar experiment at SLAC. We use kinematic and
particle-identification information to determine simultaneously in a
multidimensional maximum-likelihood fit the CP-violating parameters Spipi
and Cpipi that describe the time...
Owen Long
(University of California Riverside)
Heavy Flavor Physics [bottom, charm, tau]
In a sample of 467 million B Bbar pairs collected with the
BaBar detector at the PEP-II collider at SLAC, we observe the decay
B0bar --> Lambda_c+ pbar pi0 and measure its branching fraction. An
enhancement in the invariant mass of the baryon-antibaryon system at
threshold is also observed. No evidence for resonances is found and
we calculate a 90% upper limit of the branching fraction...
Owen Long
(University of California Riverside)
Heavy Flavor Physics [bottom, charm, tau]
We present a measurement of the branching fractions of the 22 decay
channels B0 and B+ to D(*)bar D(*) K, where
D(*)bar and D(*) are fully reconstructed. The B0
and B+ mesons are reconstructed in a sample of hadronic events for
all the possible Dbar D K modes, namely B0 --> D(*)- D(*)0 K+,
D^(*)- D(*)+ K0, D(*)0bar D(*)0 K0 and B+ --> D(*)0bar D(*)+ K0,
D(*)0bar D(*)0 K+, D(*)- D(*)+ K+....
Owen Long
(University of California Riverside)
CP-violation
We present an updated measurement of the CKM unitarity triangle angle
gamma using a Dalitz plot analysis of neutral D meson decays to
the K0_S pi+ pi- and K0_S K+ K- final states produced in the
processes B-/+ --> D(*) K-/+, with D* --> D pi0, D gamma,
and B-/+ --> D K*-/+, with K*-/+ --> K0_S pi-/+. The
analysis is based on the complete data sample consisting of 467 million
B Bbar pairs...
Aurelio Juste
(Fermilab),
H Wahl
(Florida State University),
Stefan Soldner-Rembold
(University of Manchester)
Electroweak Physics [W/Z]
We present a measurement of the integrated forward-backward charge asymmetry in top-antitop quark pair (ttbar) production in proton-antiproton collisions in the lepton plus jets final state. Using a b-jet tagging algorithm and kinematic reconstruction assuming ttbar+X production and decay, data collected by the D0 experiment at the Fermilab Tevatron Collider is used to measure the asymmetry...
Aurelio Juste
(Fermilab),
Horst Wahl
(Florida State University),
Stefan Soldner-Rembold
(University of Manchester)
Electroweak Physics [W/Z]
We present the simultaneous measurement of the ratio of branching fractions, R=B(t -> Wb)/B(t -> Wq), with q being a d, s, or b quark, and the top quark pair production cross section sigma(ttbar) in the lepton plus jets channel using data at sqrt(s)=1.96 TeV collected with the D0 detector. We extract R and sigma(ttbar) by analyzing samples of events with 0, 1 and >2 identified b jets.
We...
Owen Long
(University of California Riverside)
CP-violation
We present measurements of the time-dependent
CP-violation parameters S and C in the decays of
B0 mesons to the final states omega K^0_S, eta' K^0,
and pi^0 K^0_S. The data sample corresponds to
467 x10^6 BBbar pairs collected by the BaBar detector
at the PEP-II asymmetric-energy collider at SLAC.
Mr
Stewart Brekke
(Northeastern Illinois University)
Accelerator Physics
All masses are in a state of no motion, linear, rotational and vibratory motion.
Therefore, when an elementary particle is created, the energy involved in the creation, besides creating the mass, may also create a linear, rotational and/or vibratory motion of the particle singly or in some combination. and the magnitude of these various motions of the created particle may be modified...
Bing An Li
(University of Kentucky)
Electroweak Physics [W/Z]
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\begin{document}
\title{New dynamical gauges of the SM of EW interactions }
\author{Bing An Li\\Department of Physics, Univ. of Kentucky, Lexington, USA}
\maketitle
In this talk it shows that new gauge fixings of...
Aurelio Juste
(Fermilab),
Horst Wahl
(Florida State University),
Stefan Soldner-Rembold
(University of Manchester)
Hadron Spectroscopy
We report the first observation of the doubly strange b baryon Omega-_b in
the decay channel Omega-_b to J/psi Omega-, with J/psi to mu+ mu-
and Omega- to Lambda K- to (p pi-)K- in ppbar
collisions at sqrt{s} = 1.96 TeV. Using approximately 1.3 fb-1 of
data collected with the D0 detector at the Fermilab Tevatron Collider, we
observe a signal with 5.4 sigma.
154.
Prospects for studying the ttbar invariant mass spectrum and the ttbar spin correlations at CMS
Boaz Klima
(Fermi National Accelerator Lab. (Fermilab)-Unknown-Unknown)
Top Quark Physics
The top quark was discovered at the Tevatron in 1995. For the last decade the study of its properties has been a major theme in the worldwide experimental high energy physics program. The advent of the LHC opens up a new era in top quark physics; because of the large ttbar cross-section and the high luminosity, the LHC can be thought of as a top factory.
Here we report on prospects for...
Stewart Brekke
(Northeastern Illinois University)
Accelerator Physics
The incident photon in Compton scattering may also affect the rotation and vibration of the impacted particle. Therefore, the Compton Effect formula must account for the total motion change, not just the linear motion. The Compton relation must be modified in the following manner: $\{hc/\lambda_1 + mc^2
+ 1/2mv^2_1 + 1/2I\omega^2_1 + 1/2k_1x^2_1 = hc/\lambda_2 + mc^2 +
1/2mv^2_2...
Aurelio Juste
(Fermilab),
H Wahl
(Florida State University),
Stefan Soldner-Rembold
(University of Manchester)
Electroweak Physics [W/Z]
Anomalous Wtb couplings modify the angular correlations of the top quark
decay products and change the single top quark production cross section.
We present limits on anomalous top quark couplings by combining
information from W boson helicity measurements in top quark decays and
anomalous coupling searches in the single top quark final state.
We set limits on right-handed vector...
Aurelio Juste
(Fermilab),
Horst Wahl
(Florida State University),
Stefan Soldner-Rembold
(University of Manchester)
Beyond the Standard Model
We report on a study of events containing at least two muons produced in
ppbar collisions at sqrt{s}=1.96 TeV, performed at the D0 experiment
using data corresponding to 0.9 fb-1 of integrated luminosity collected
during 2008. Motivated by a recent claim of an excess in muons produced at
large radius by the CDF collaboration, we study muons that appear to be
produced with a radius between...
Boaz Klima
(Fermi National Accelerator Lab. (Fermilab)-Unknown-Unknown)
Beyond the Standard Model
The new energy regime that becomes accessible at the LHC will allow to extend the search region for 4th generation of quarks and leptons beyond existing constraints. Two studies covering both the low-mass and high-mass $b'$ search regions are performed. Using leading order cross section for $b'$ production, we determine the significance expected for an observation at up to $1$/fb data at...
Aurelio Juste
(Fermilab),
H Wahl
(Florida State University),
Stefan Soldner-Rembold
(University of Manchester)
Beyond the Standard Model
We present results of searches for unique experimental signatures
that might arise from a hidden sector extension (hidden valley)
of the standard model. Reduced couplings to the hidden sector
can result in long-lived particle decays that result in
highly displaced vertices from di-leptons or di-jets.
By searching for such signatures, D0 extends
its discovery potential into...
Owen Long
(University of California Riverside)
CP-violation
We report on the search for the decays B+ --> D+ K0
and B+ --> D+ K*0 using 467 million B Bbar pairs collected
at the Upsilon(4S) resonance with the BaBar detector at the
PEP-II B factory at SLAC.
Owen Long
(University of California Riverside)
Heavy Flavor Physics [bottom, charm, tau]
Using the BaBar data sample of 455 million B Bbar pairs, we
measure the branching fractions for ten Cabibbo-favored B decays to
final states of the form B0bar,B- --> D(*) p pbar n pi, n=0,1,2
and study their decay dynamics.
john brandenburg
(Orbital Technologies Corporation)
Beyond the Standard Model
In the GEM unification theory ( Brandenburg 2007) a deep connection is found between alpha, the fine structure constant, and the proton/electron mass ratio. This is understood since the Wyler-Lenz formula (Wyler 1971) for alpha and the Wyler-Lenz proton/electron mass ratio formula can be hueristically derived by the assumption Planckian spectra in the proton and in the vacuum. It is found...
