Prof.
Michael Roney
(University of Victoria (CA))
06/07/2012, 09:00
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
SuperB has a programme of precision electroweak measurements made possible using data at the Y(4S) by virtue of beam polarisation. These measurements include sin^2 theta_W obtained via left-right asymmetry measurements of e+e- transitions to pairs of fermions. The precision obtainable at SuperB is expected to match that of the LEP/SLC world average at the center of mass energy of 10.58GeV....
Dr
Ignasi Rosell
(Universidad CEU Cardenal Herrera and IFIC (ES))
06/07/2012, 09:15
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
If the Higgs boson does not show up soon, we should look for alternative mechanisms of mass generation, satisfying the many experimental constraints which the Standard Model (SM) has successfully fulfilled so far. Following this aim, we present a one-loop calculation of the oblique S parameter within Higgsless models of Electroweak Symmetry Breaking (EWSB) and analyze the phenomenological...
Dr
Scott Yost
(The Citadel (US))
06/07/2012, 09:30
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
Reaching the desired precision level for W and Z processes at the LHC will require a mixture of higher-order QCD and electroweak corrections. HERWIRI2 is a step in implementing QED x QCD exponentiation in a hadronic event generator. This program implements leading electroweak corrections and coherent exclusive exponentiation in a HERWIG environment. We discuss the status of the program,...
Dr
Anna Kropivnitskaya
(University of Florida (US))
06/07/2012, 09:45
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
The production of W and Z bosons has been observed in pp collisions at a center-of-mass energy of 8 TeV using data collected in the CMS experiment. W events were selected containing an isolated, energetic electron or muon. Z events were selected containing a pair of isolated, energetic electrons or muons. Data-driven methods are used to estimate reconstruction and triggering efficiencies, and...
Dr
Joshua Moss
(Ohio State University (US))
06/07/2012, 10:00
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
Precise measurements of W and Z production, including the polarisations of W bosons and of tau leptons produced in W decays are presented. They provide tests of lepton universality and constrain electroweak parameters.
Prof.
Zhengguo Zhao
(Univ. of Science & Tech. of China (CN))
06/07/2012, 10:15
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
Differential and total visible cross sections for W+photon and Z+photon production are measured and compared to the predictions of the standard model. Limits on anomalous triple-gauge couples are derived, and the data are used to search for physics beyond the standard model.
Dr
Syue-Wei Li
(National Central University (TW))
06/07/2012, 11:00
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
We present the measurement of Wgamma and Zgamma production cross sections using data corresponding to the full 2010 and 2011 periods of the LHC run. For charged lepton decay modes of W and Z bosons the total cross sections are measured for photon transverse energy greater than 15 GeV. We also present the first measurement of Zgamma production cross section using the nunugamma final state for...
Prof.
Heidi Schellman
(Northwestern University)
06/07/2012, 11:15
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
We measure the cross section and differential distributions for the production of a weak bosons (W or Z) in association with a photon in data collected with the D0 detector at the Fermilab Tevatron ppbar collider at sqrt(s)=1.96 TeV and corresponding to integrated luminosities of up to 6.2 fb-1. The W and Z bosons are identified via their leptonic decays to electrons or muons. The results...
Dr
Tobias Kasprzik
(KIT (DE))
06/07/2012, 11:30
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
W-boson pair production has been studied extensively during the LEP era, amongst others leading to a precise determination of the W-boson mass and width. At the LHC, vector-boson pair production will be of similar importance. Such processes constitute an important irreducible background to SM-Higgs production in the intermediate-mass region and have already been used to exclude a wide range of...
Mr
Kalanand Mishra
(Fermi National Accelerator Lab. (US))
06/07/2012, 11:45
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
We present studies of WW, WZ and ZZ diboson production in pp collisions based on data recorded by the CMS detector at the LHC. These include precise measurements the production cross section of these processes at center-of-mass energies of 7 and 8TeV . The leptonic decay modes of the W and Z bosons are used. The results are interpreted in terms of constraints on anomalous triple gauge...
Dr
Chris Hays
(University of Oxford (GB))
06/07/2012, 12:00
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
ATLAS measurements of diboson production processes involving ZZ, WW and WZ final states are presented. Differential and total visible cross sections are measured for channels involving leptons and neutrinos, and differential distributions are presented. In the ZZ->2l2nu and WW->lnulnu channels, jet vetos are applied. Total cross sections are derived, and limits are set on anomalous...
Mr
Gregorio Bernardi
(LPNHE University of Paris (FR))
06/07/2012, 12:15
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
We study WW and WZ production with l nu q q (l=e,mu) final states using data collected by the D0 detector at the Fermilab Tevatron Collider corresponding to 4.3 fb-1 of integrated luminosity from ppbar collisions at sqrt(s)=1.96 TeV. Assuming the ratio between the production cross sections sigma(WW) and sigma(WZ) as predicted by the standard model, we measure the total WV (V=W,Z) cross section...
Dr
Bjorn Penning
(Fermi National Accelerator Laboratory)
06/07/2012, 14:00
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
We present a combined measurement of the cross section for the simultaneous production of two vector bosons (WZ,ZZ), where one of the bosons decays leptonically (W-->lv, Z-->ll or Z-->vv) and the other Z boson decays to bbar. The measurement uses the complete Run 2 dataset collected with the D0 detector in ppbar collisions at sqrt(s)=1.96 TeV, and combines the three leptonic decay modes...
Dr
Marco Trovato
(Fermi National Accelerator Laboratory (US))
06/07/2012, 14:15
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
We present the results of CDF searches for diboson production in final states with jets identified as originating from heavy flavor quark decays. In particular, searches for WZ/ZZ production where the first W or Z boson decays leptonically and the second Z decays into a pair of bottom or charm quarks mimic primary Tevatron searches for a low mass Higgs with subsequent decay into a pair of...
Mr
Javier Llorente
(Universidad Autรณnoma De Madrid (ES))
06/07/2012, 14:30
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
We present an analysis with improved sensitivity to
the light charged Higgs ($m_{H^+} < m_t-m_b$) searches in the top
quark decays $t \to b H^+ \to b (\tau^+\nu_\tau) + ~{\rm c.c.}$ in the $t\bar{t}$ and single $t/\bar{t}$ production processes at the LHC.
In the Minimal Supersymmetric Standard Model (MSSM), one anticipates the branching ratio ${\cal B} (H^+ \to \tau^+\nu_\tau)\simeq 1$ over...
Dr
Aldo Saavedra
(University of Sydney (AU))
06/07/2012, 14:45
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
The results of a search for charged Higgs bosons are presented. The analysis is based on proton-proton collision data recently collected by the ATLAS experiment at the Large Hadron Collider, using ttbar events with a tau lepton in the final state. The data are consistent with the background from Standard Model processes. Assuming branching ratio BR(H+ -> taunu) = 100%, this leads to upper...
Prof.
James Olsen
(Princeton University (US))
06/07/2012, 15:00
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
Results are presented on the search for the non standard-model Higgs production and decays, beyond MSSM SUSY, including the production of a doubly charged Higgs boson decaying onto a pair of like sign charged leptons and a search for a low mass neutral a_0 decaying into a pair of muons. The full data sample of 4.7 fb-1 of pp collisions collected in 2011 with the CMS experiment at a CM energy...
Dr
Avto Kharchilava
(State University of New York (US))
06/07/2012, 15:15
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
We present a search for Higgs bosons in the bh(h-->bbar) and bbh(h-->bbar) channels at a center-of-mass energy of sqrt(s)=1.96 TeV with the D0 detector at the Fermilab Tevatron collider. In many Supersymmetric models the cross-section for production of neutral Higgs bosons in association with bottom quarks is greatly enhanced compared to the Standard Model, and over much of the parameter space...
Dr
Christian Veelken
(Ecole Polytechnique (FR))
06/07/2012, 16:00
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
Results are presented on the search for MSSM SUSY Higgs production and decays, including a neutral Higgs decaying to a pair of tau leptons, and a charged Higgs decaying in tau neutrino. The full data sample of 4.7 fb-1 of pp collisions collected in 2011 with the CMS experiment at a CM energy of 7 TeV have been analyzed, as well as a significant fraction of the 2012 luminosity delivered so far...
Mr
Sascha Ulrich Thoma
(Albert-Ludwigs-Universitรคt Freiburg (DE))
06/07/2012, 16:15
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
The Minimal Supersymmetric extension of the Standard Model (MSSM) predicts the existence of three neutral and two charged Higgs bosons. The search for the neutral MSSM Higgs bosons in the H-> tau^+ tau^- and H->mu^+mu^- decay modes has been performed using proton-proton collision data recently collected with the ATLAS detector at the Large Hadron Collider. The exclusion limits at the 95%...
Dr
Matteo Sani
(University of California (US))
06/07/2012, 16:30
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
Vector boson fusion and associate production of Higgs bosons are searched for, with the Higgs decaying into vector bosons. The results are interpreted in a model for a fermiophobic Higgs. The full data sample of 4.7 fb-1 of pp collisions collected in 2011 with the CMS experiment at a CM energy of 7 TeV have been analyzed, as well a significant fraction of the 2012 luminosity delivered so far...
Prof.
Paoti Chang
(National Taiwan University (TW))
06/07/2012, 16:45
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
A light $CP$-odd Higgs boson $(A^0)$ is predicted in some extensions of the Standard Model; such a particle would be evident in decays of the $\Upsilon(nS)$ resonance.
Using a data sample of 102 million $\Upsilon(1S)$ events and 158 million $\Upsilon(2S)$ events collected by the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider, we search for light Higgs boson decays $A^0 \to...
Prof.
Yury Kolomensky
(UC Berkeley & LBNL (US))
06/07/2012, 17:00
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
We search for a light CP-odd Higgs boson (A0) that arises in non-minimal supersymmetric extensions of the Standard Model and naturally couples strongly to bottom quarks. The search is conducted using radiative di-muon and di-tau decays of the Upsilon(1S) meson. We use BABARโs large data sets of (92.8 +- 0.8) million Upsilon(2S) and (116.8 +- 1.0) million Upsilon(3S) decays to identify...
Dr
DOYOUN Kim
(Monash University)
06/07/2012, 17:15
Track 1 - The Standard Model and EW Symmetry Breaking - Higgs Searches
Parallel Sessions
In this talk we consider very light Higgs fields in BMSSM(Beyond MSSM). The spectrum below TeV scale is the same as the MSSM but the Higgs potential is modified and is well described in terms of effective dimension five and six operators. A correction from the BMSSM operators allows us to consider new parameter space of Higgs sector which is not allowed in the MSSM. It can be regarded as a...
