Bugra Bilin
(Middle East Technical University (TR))
04/03/2015, 17:00
Differential Z + jet cross section measurements with respect to the number of jets and various jet kinematic variables are presented where the Z bosons are reconstructed from opposite sign electron and muon pairs. The analysis is based on data of proton proton collisions with the centre of mass energy of 8 TeV collected in 2012 by the CMS experiment at LHC corresponding to 19.8 fb^-1 of...
Eric Hayato Takasugi
(Univ. of California Los Angeles (US))
04/03/2015, 17:01
Andrew Michael Levin
(Massachusetts Inst. of Technology (US))
04/03/2015, 17:01
Marek Sirendi
(University of Cambridge (GB))
04/03/2015, 17:02
Noemi Calace
(Universite de Geneve (CH))
04/03/2015, 17:02
The cross sections for the production of a W boson in association with jets and the ratio of the production cross section of V + jets (Rjets) have been measured in proton-proton collision at sqrt(s) = 7 TeV with the ATLAS experiment at the LHC with the data sample accumulated in 2011, corresponding to an integrated luminosity of 4.6 fb^(-1).
W + jets production cross section and Rjets are...
Gian Michele Innocenti
(Massachusetts Inst. of Technology (US))
04/03/2015, 17:02
Austin Alan Baty
(Massachusetts Inst. of Technology (US))
04/03/2015, 17:03
The energy loss of partons transversing a hot, dense medium is studied by comparing the measured momentum flow of PbPb and pp collisions containing high momentum dijets. The PbPb and pp data used has integrated luminosities of 150 $\mu b^{-1}$ and 5.3 $pb^{-1}$, respectively, and was gathered by the CMS detector at $\sqrt{s_{NN}} $= 2.76 TeV. Dijet events are selected by using an anti-kt jet...
Elena Plotnikova
(Joint Institute for Nuclear Research (RU))
04/03/2015, 17:03
Studies of one–dimensional Bose–Einstein Correlations for pairs of like–sign charged particles measured in the kinematic range $p_{T}$ > 100 MeV and |$\eta$| < 2.5 in $pp$–collisions at $\sqrt{s}$ = 0.9 and 7 TeV with the ATLAS detector at the CERN Large Hadron Collider, are presented. The integrated luminosities are about 7 $\mu b^{−1}$, 190 $\mu b^{−1}$ and 12.4 $nb^{−1}$ for 0.9 TeV, 7 TeV...
Carlos Vazquez Sierra
(Universidade de Santiago de Compostela (ES))
04/03/2015, 17:04
CP violating phase φs appears in b → anti(c)cs transitions due to the interference between the direct decay and the decay after the Bs⁰-anti(Bs⁰) mixing. In SM, φs = -2βs + δP, where -2βs is related to CKM matrix elements and δP is the penguin phase where contributions due to penguin diagrams are taken into account, being this δP phase also the main source of theoretical uncertainty in φs....
Till Michael Arndt
(Deutsches Elektronen-Synchrotron (DE))
04/03/2015, 17:05
The production cross section of top-quark pairs associated with a photon (ttbar+gamma) is determined in the muon+jets decay channel using 19.7 fb-1 of data taken at sqrt(s) = 8 TeV with the CMS detector. The relative fraction of ttbar+gamma events normalized to inclusive ttbar production is measured. Using an inclusive CMS cross section measurement, the ttbar+gamma cross section is determined...
Andrey Popov
(Universite Catholique de Louvain (UCL) (BE))
04/03/2015, 17:05
The poster presents searches for the production of Higgs bosons in association with single top quarks, performed by the CMS experiment. Two decay channels of the Higgs boson are considered: diphoton and bb. Full 8 TeV dataset of 19.7/fb is utilised. The searches are focused on the case of an anomalous top-quark Yukawa coupling y_t = -1. They deliver upper limits of 4.1 and 7.6 times the...
Can You
(Johns Hopkins University (US))
04/03/2015, 17:06
The study of spin-parity of the recently discovered H boson is performed using the H->4l decay mode. The full dataset recorded by the CMS experiment during the LHC Run 1 is used, corresponding to an integrated luminosity of up to 5.1 fb^-1 at a center-of-mass energy of 7 TeV and up to 19.7 fb^-1 at 8 TeV. Any mixed-parity spin-one state is excluded in the ZZ modes at a greater than 99.999%...
Bastien Luca Muster
(Ecole Polytechnique Federale de Lausanne (CH))
04/03/2015, 17:06
A search is presented for long-lived particles with a mass between 25 and 50 GeV/c^2 and a lifetime between 1 and 200ps in a sample of proton-proton collisions at a centre-of-mass energy of \sqrt{s} = 7TeV, corresponding to an integrated luminosity of 0.62fb^{-1}, collected by the LHCb detector. The particles are assumed to be pair-produced by the decay of a Standard Model-like Higgs boson....
Aram Apyan
(Massachusetts Inst. of Technology (US))
04/03/2015, 17:07
Ondrej Penc
(Acad. of Sciences of the Czech Rep. (CZ))
04/03/2015, 17:07
Alessandro Calandri
(CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))
04/03/2015, 17:08
Fabio Ferrari
(University of Bologna and INFN (IT))
04/03/2015, 17:08
The B0bar-B0 and Bsbar-Bs production asymmetries, AP(B0) and AP(Bs), are measured by means of a time-dependent analysis of B0 -> J/\psi K*0, B0 -> D- pi+ and Bs -> Ds- pi+ decays, using a data sample corresponding to an integrated luminosity of 1.0 fb^{-1}, collected by LHCb in pp collisions at a centre-of-mass energy of 7 TeV. The measurements are performed as a function of transverse...
Mr
Luca Pernie
(Universite Libre de Bruxelles (BE))
04/03/2015, 17:08
We present prospects for the usage of precise timing information during the high luminosity phase of the LHC, where the instantaneous luminosity is estimated to be greater than 10^34 cm-2s-1, resulting in about 140 simultaneous proton-proton (pileup) collisions that occur every 25 nsec. It is shown that time information could be exploited for the association of photons to their collision...
Paul Glaysher
(University of Edinburgh (GB))
04/03/2015, 17:09
Martino Borsato
(Laboratoire de l'Accelerateur Lineaire (FR))
04/03/2015, 17:09
An angular analysis of the $B^0 \rightarrow K^{*0} e^+ e^-$ decay is performed using a data sample,
corresponding to an integrated luminosity of 3.0${\mbox{\,fb}^{-1}}$, collected by the LHCb experiment in $pp$ collisions at centre-of-mass energies of 7 and 8 TeV during 2011 and 2012.
For the first time several observables are measured in the dielectron mass squared ($q^2$) interval...
Atanas Ivanov Batinkov
(University of Sofia (BG))
04/03/2015, 17:09
The Data Quality Monitoring Software proved to be a central tool in the Compact Muon Solenoid experiment. Its flexibility allowed its integration in several environments: online, for real-time detector monitoring; offline, for the final, fine-grained data certification. The usage of the Data Quality Monitoring software in the different environments and its integration in the Compact Muon...
Jackson William Smith
(University of Cambridge (GB))
04/03/2015, 17:10
Results of the latest $\gamma$ combination from LHCb are presented, along with the six LHCb measurements used as inputs. In addition, the anticipated precision attainable for measuring $\gamma$ after the LHCb Upgrade is outlined.
Salvatore Di Guida
(Universita degli Studi Guglielmo Marconi (IT))
04/03/2015, 17:10
We review the online and offline workflows designed to align and calibrate the CMS detector. Starting from the gained experience during the first LHC run, we discuss the expected developments for Run II. In particular, we describe the envisioned different stages, from the alignment using cosmic rays data to the detector alignment and calibration using the first proton-proton collisions data (...
Michaela Queitsch-Maitland
(University of Manchester (GB))
04/03/2015, 17:10
This poster presents measurements of the fiducial and differential cross sections for Higgs boson production in the H→γγ and H→ZZ*→4l channels at √s = 8 TeV with the ATLAS detector. The cross sections are measured within in a fiducial volume and unfolded to particle level. The results are compared to a selection of theoretical predictions for a Standard Model Higgs boson.
Shanzhen Chen
(University of Manchester (GB))
04/03/2015, 17:11
The LHCb experiment has recorded the world's largest sample of charmed meson decays. This contribution presents a study of a $D^0$ meson decaying into a final state containing a neutral pion in LHCb. The search for $CP$ violation exploits a novel model-independent unbinned technique to assign a $p$-value for the no $CP$ violation hypothesis. With a data sample size exceeding that of previous...
Michele Quinto
(Universita e INFN-Bari (IT))
04/03/2015, 17:11
Data acquisition systems in High Energy Physics process data produced by particle detector at colliders or fixed target experiments. With the LHC era collisions are produced at the bunch crossing rate of 40MHz. Data volumes and trigger rates pose requirements for Data Acquisition Systems. The TOTEM Experiment at the LHC collider measures total p-p cross section at the accelerator energies and...
Michael Aaron Kagan
(SLAC National Accelerator Laboratory (US)),
Qi Zeng
(SLAC National Accelerator Laboratory (US))
04/03/2015, 17:12
Maxime Guilbaud
(Rice University (US))
04/03/2015, 17:12
Lorenzo Sestini
(Universita e INFN (IT))
04/03/2015, 17:12
The Bs* -> Ds* K and Bs* -> Ds* \pi decays are of paramount interest as they can be used, combined with Bs -> Ds K and Bd -> D* \pi, to measure the weak phase \gamma. We present the first observation of the Bs* -> Ds* K decay, where Ds* are reconstructed through the decay chain Ds* -> Ds (-> K K \pi) \gamma, using an integrated luminosity of 3.0 fb^{-1} recorded by the LHCb experiment.
Luca Pescatore
(University of Birmingham (GB))
04/03/2015, 17:13
The differential branching fraction of the rare decay Λ0b → Λμ+μ− is measured as a function of q2, the square of the dimuon invariant mass. The analysis is performed using data collected by the LHCb experiment, corresponding to an integrated luminosity of 3.0 fb−1. These include evidence for signal at dimuon masses below the square of the J/ψ mass with significance above 3σ. In the q2...
Edoardo Bossini
(Università degli Studi di Siena e INFN-Pisa)
04/03/2015, 17:13
Ilya Komarov
(Ecole Polytechnique Federale de Lausanne (CH))
04/03/2015, 17:14
A search for the rare decays B0s->pi pi mu mu and B0->pi pi mu mu is performed
in a data set corresponding to an integrated luminosity of 3.0 fb-1 collected by
the LHCb detector in proton-proton collisions at centre-of-mass energies of 7 and
8TeV. Decay candidates with pion pairs that have invariant mass in the range
0.5--1.3 GeV/c2 and with muon pairs that do not originate from a...
Leonor Cerda Alberich
(Instituto de Fisica Corpuscular (ES))
04/03/2015, 17:14
This poster will present the status of the ATLAS Tile Calorimeter at the beginning of the LHC Run II, with emphasis on the electronics consolidation during LS1 and recent operation experience with cosmics. The status of the Phase II upgrade R&D will also be briefly presented.
Ramon Niet
(Technische Universitaet Dortmund (DE)),
Vanessa Mueller
(Technische Universitaet Dortmund (DE))
04/03/2015, 17:15
Xavier Coubez
(Institut Pluridisciplinaire Hubert Curien PHC (FR))
04/03/2015, 17:15
Laura Franconi
(University of Oslo (NO))
04/03/2015, 17:15
The Insertable B-Layer was inserted in May 2014 in the centre of the ATLAS detector. This new layer will enhance the tracking robustness of the inner detector, improve the vertexing and b-tagging capabilities and preserve the high performance of the Pixel detector, in spite of the radiation damage, particularly important in the B-Layer. The poster presents an overview of the structure of the...
Stefanos Leontsinis
(National Technical Univ. of Athens (GR))
04/03/2015, 17:16
Othmane Rifki
(University of Oklahoma (US))
04/03/2015, 17:17
ATLAS is a general purpose particle detector at the Large Hadron Collider (LHC) at CERN designed to measure the products of proton collisions. Given their high interaction rate (1GHz), selective triggering in real time is required to reduce the rate to the experiment’s data storage capacity (1KHz). To meet this requirement, ATLAS employs a combination of hardware and software triggers to...
Varvara Batozskaya
(National Centre for Nuclear Research (PL))
04/03/2015, 17:23
Marco Leoncino
(University of Turin and INFN (IT))
04/03/2015, 17:25
The ALICE Collaboration has studied the inclusive $\psi(\mathrm{2S})$ production in p-Pb collisions at the CERN LHC. The $\psi(\mathrm{2S})$ is detected through its decay to a muon pair, using the forward Muon Spectrometer, which covers the pseudo-rapidity range $-4<\eta<-2.5$. $\psi(\mathrm{2S})$ results are compared to the J/$\psi$ ones by means of the production cross section ratio as a...
Javier Martin Blanco
(Laboratoire de Physique Subatomique et des Technologies Associe)
04/03/2015, 17:26
Measurements of particle production as a function of the event multiplicity provide a very useful tool to study the presence of collective-like effects in small size systems compared to Pb-Pb, as is the case of pp and p-Pb collisions.
We report the measurement of the inclusive $J/\psi$ yield and transverse momentum as a function of charged particle pseudo rapidity density...
Emine Gurpinar
(Cukurova University (TR))
04/03/2015, 17:26
A search for resonances and quantum black holes is performed using the dijet mass spectra measured in proton-proton collisions at √s = 8 TeV with the CMS detector at the LHC. The data set corresponds to an integrated luminosity of 19.7 fb−1. In a search for narrow resonances that couple to quark-quark, quark-gluon, or gluon-gluon pairs, model independent upper limits, at 95% confidence level,...
Haitao Zhang
(Central China Normal University CCNU (CN))
04/03/2015, 17:27
Identified hadron spectra are considered to be sensitive to transport properties of strongly interacting matter produced in high-energy nucleus-nucleus collisions.
We present measurements of $\pi^0$ and $\eta$ mesons at mid-rapidity in a wide transverse momentum range in pp and Pb-Pb collisions at LHC energies measured with the ALICE detector. The mesons are reconstructed via their...
Klaas Ole Padeken
(Rheinisch-Westfaelische Tech. Hoch. (DE))
04/03/2015, 17:27
Search for dark matter in the mono-X channels (mono-lepton, mono-jet, mono-photon) with the full 2012 dataset. Exclusion limits have been set using both, vector- and axial-vector couplings. Interpretations have been performed in the EFT approach (where the mediator is not modelled) as well as scanning mediator parameters. The poster should summarize these three channels and show the complete...
Cristina Bedda
(Universita e INFN Torino (IT))
04/03/2015, 17:28
Heavy quarks (charm and beauty) can be used to study the properties of the strongly interacting matter that is created in central Pb-Pb collisions at ultrarelativistic energies. They are produced in parton scattering processes with high momentum transfer in the initial stages of the collisions. Therefore, the heavy quarks pass through all the phases of the system evolution losing energy via...
Mr
Michaël Buttignol
(Institut Pluridisciplinaire Hubert Curien (IPHC))
04/03/2015, 17:28
We explore new physics scenarii where a top quark is produced together with missing transverse energy. These classes of processes, called monotops, are described with an effective theory approach. The phenomenological study done to prepare the searches on real data is presented as well as a status report of searches being performed using the 8 TeV p-p collisions of the LHC.
Rudiger Haake
(Westfaelische Wilhelms-Universitaet Muenster (DE))
04/03/2015, 17:29
Highly energetic jets are sensitive probes for the kinematics and the topology of nuclear collisions. Jets are collimated sprays of charged and neutral particles, which are produced in the fragmentation of hard scattered partons in an early stage of the collision. The measurement of jet spectra in p--Pb collisions provides an important way of quantifying the effects of cold nuclear matter in...
Jui-Fa Tsai
(National Taiwan University (TW))
04/03/2015, 17:29
A search is performed for the pair-production of a heavy vector-like quark b' of charge -1/3 and its anti-particle, using data collected by the CMS experiment, from the LHC pp collisions at centre-of-mass energy of 8 TeV and corresponding to an integrated luminosity of 19.7 fb-1. We search for the b' quark decaying to a Higgs-boson and a b quark, assuming a branching ratio of 100%, in a final...
48.
Production of strange particles in charged jets in p–Pb and Pb–Pb collisions measured with ALICE
Alice Zimmermann
(Ruprecht-Karls-Universitaet Heidelberg (DE)),
Vit Kucera
(Acad. of Sciences of the Czech Rep. (CZ))
04/03/2015, 17:30
At intermediate transverse momenta (2 GeV/c < pT < 5 GeV/c), a strong increase of the baryon-to-meson ratio is observed for inclusive light particles produced in heavy-ion collisions (Pb–Pb) and proton–nucleus collisions (p–Pb) when compared to the ratio measured in proton–proton collisions. Production by fragmentation in vacuum cannot explain this phenomenon. Other hadronisation mechanisms,...
Marc Dunser
(Eidgenoessische Tech. Hochschule Zuerich (CH)),
Santiago Folgueras
(Universidad de Oviedo (ES))
04/03/2015, 17:30
Although same sign dileptons final states are very rare in the SM context, they appear naturally in many different new physics scenarios such as SUSY where two same-sign dileptons can be produced in the decay chain of supersymetric particles.
Different scenarios can be presented: Same-sign dileptons accompanied by b-quarks can arise from SUSY processes where 3rd generation quark...
Manuel Colocci
(Universita e INFN, Bologna (IT))
04/03/2015, 17:31
The ALICE detector was designed to study heavy-ion collisions at the LHC energies. During Run-I of Pb--Pb collisions, ALICE collected data at √(𝑠_NN) = 2.76 TeV. At this energy, almost equal amounts of matter and antimatter are produced in the central rapidity region. This is also observed for (hyper)nuclei and anti-(hyper)nuclei, which are measured with nearly identical abundances. Thanks to...
Aidan Sean Randle-Conde
(Universite Libre de Bruxelles (BE)),
Giuseppe Fasanella
(Universite Libre de Bruxelles (BE))
04/03/2015, 17:31
Resonances in the dielectron and dimuon decay channels arise in many well established theories beyond the standard model, like grand unified theories (GUT) or models proposing extra spatial dimension(s). The legacy results obtained from the LHC RUN1, using the full dataset collected by the CMS experiment in 2012 from proton-proton collisions at a center-of-mass energy of 8 TeV, and...
Manuel Schreyer
(Bayerische Julius Max. Universitaet Wuerzburg (DE))
04/03/2015, 17:32
A search for supersymmetric particles in final states containing a Z boson, jets and large missing transverse momentum is presented. The data sample was collected at a centre-of-mass energy sqrt{s}=8 TeV by the ATLAS detector at the Large Hadron Collider and corresponds to an integrated luminosity of 20.3 fb^{−1}. The search targets GGM models in which Z bosons can arise in the decays of the...
Nicolo Jacazio
(Universita e INFN Torino (IT))
04/03/2015, 17:32
Abstract: The ALICE detector with its excellent particle identification (PID) and transverse momentum (pT) coverage is an ideal tool to study the production of identified particles at mid-rapidity over a wide range of pT. This poster contains a summary of the results on pT spectra of π, K and p at low pT. Studies aiming at searches for collective phenomena in smaller systems, such as pp and...
Tuva Ora Herenui Richert
(Lund University (SE))
04/03/2015, 17:33
The ALICE experiment has unique capabilities for particle identification at midrapidity over a wide range of transverse momentum (pT), making it an ideal tool for comprehensive measurements of hadrons such as charged pions, kaons, and protons as well as Lambda, K0s and phi. The transverse momentum distributions of these particles as measured in p--Pb and Pb--Pb collisions will be presented and...
William Kalderon
(University of Oxford (GB))
04/03/2015, 17:33
A search for pair production of scalar charm quarks has been performed using 20 fb-1 of data collected by the ATLAS experiment in 8 TeV proton-proton collisions at the LHC. An innovative charm tagging algorithm was used to identify jets produced by the hadronisation of a charm quark. Results for this first dedicated search for scalar charm quarks, obtained with the final state of two...
Revital Kopeliansky
(Israel Institute of Technology (IL))
04/03/2015, 17:34
Searches for heavy long-lived charged particles (LLP) were performed on a 19.1 𝑓𝑏-1 data sample from p-p collisions at √s = 8TeV collected by the ATLAS detector at the LHC. No excess is observed above the estimated background and limits are placed on the mass of the LLPs in various supersymmetric models: R-hadrons, directly produced charginos, stable sleptons produced directly or in cascade...
Francesco Guescini
(Universite de Geneve (CH))
04/03/2015, 17:35
Tatiana Likhomanenko
(National Research Centre Kurchatov Institute (RU))
04/03/2015, 17:45
The main b-physics trigger algorithm used by the LHCb experiment is the so-called topological trigger. The topological trigger selects vertices which are a) detached from the primary proton-proton collision and b) compatible with coming from the decay of a b-hadron. In the LHC Run 1, this trigger utilized a custom boosted decision tree algorithm, selected an almost 100% pure sample of...
Silvio Donato
(Universita di Pisa & INFN (IT))
04/03/2015, 18:05
The LHC is expected to reach up to forty proton-proton collisions per bunch crossing at 13 TeV this year. In this high pile-up scenario, the rate of hadronic triggers is expected to be high. Soft jets originating from pile-up collisions may contribute to the multijet trigger rate and, in addition, they can produce fake missing transverse energy. At the CMS experiment, pile-up effects are...
Qidong ZHOU
(Nagoya University (JP))
04/03/2015, 18:06
LHCf will have an operation of √s=13TeV p-p collisions in May 2015. The operation is scheduled for 5 days with very low luminosity (1029 cm-2 s-1), collaborating with the ATLAS experiment. The common data acquisition with ATLAS gives central information to help LHCf identifying the diffractive events. We designed the trigger system on the LHCf side for the common operation. By using PYTHIA...
Ben Nachman
(SLAC National Accelerator Laboratory (US))
04/03/2015, 18:07
A review of recent developments on the performance of jet substructure with the ATLAS detector. Topics include jet mass calibrations and uncertainties, pileup mitigation using subjet pileup jet tagging, new substructure variables, and jet mass performance in high pileup conditions.
Alex Birnkraut
(Technische Universitaet Dortmund (DE)),
Ulrich Paul Eitschberger
(Technische Universitaet Dortmund (DE))
04/03/2015, 18:08
Measurements of flavour oscillations and time-dependent CP asymmetries in neutral B meson systems require knowledge of the b quark production flavour. This identification is performed by the Flavour Tagging.
Kirill Grevtsov
(Centre National de la Recherche Scientifique (FR))
04/03/2015, 18:18
This poster presents the electron and photon energy calibration achieved with the ATLAS detector using about 25 fb−1 of LHC proton–proton collision data taken at centre-of-mass energies of s√ = 7 and 8 TeV. The reconstruction of electron and photon energies is optimised using multivariate algorithms. The response of the calorimeter layers is equalised in data and simulation, and the...
Eric Drechsler
(Georg-August-Universitaet Goettingen (DE))
04/03/2015, 18:19
Hadronically decaying tau-leptons are important for Standard Model (SM), Higgs- and Beyond SM analyses and hence a key part of the ATLAS physics program. A correct understanding of the performance of the reconstruction and identification algorithms is a crucial part for any analysis involving tau-leptons.
Roland Jansky
(University of Innsbruck (AT))
04/03/2015, 18:20
Detailed understanding and optimal track reconstruction performance of ATLAS in the core of high pT objects is paramount for a number of techniques such as jet energy and mass calibration, jet flavour tagging, and hadronic tau identification as well as measurements of physics quantities like jet fragmentation functions. These dense environments are characterized by charged particle separations...
Danijela Bogavac
(University of Belgrade (RS))
04/03/2015, 18:21
In high-energy physics experiments, online selection is crucial to identify the few interesting collisions from the large data volume processed. In the overall ATLAS trigger strategy, b-jet triggers are designed to identify heavy-flavor content in real-time and, in particular, provide the only option to efficiently record events with fully hadronic final states containing b-jets. In doing so,...
Kurt Brendlinger
(University of Pennsylvania (US))
04/03/2015, 18:22
Bo Liu
(Academia Sinica (TW)/Shandong University(CN))
04/03/2015, 18:23
Aparajita Dattagupta
(Indiana University (US)),
Aparajita Dattagupta
(Indiana University (US))
04/03/2015, 18:24
Jets are collimated sprays of hadrons coming from the fragmentation of quarks and gluons. They are formed from topologically related energy deposits in calorimeter cells (topo-clusters). The input topo-clusters can be calibrated either at the electromagnetic scale (EM) or with the local cluster weighting scheme (LCW), which tries to correct for the differences between electromagnetic and...
Jeson Abe Jacob
(University of Bristol (GB))
04/03/2015, 19:00
A differential cross section measurement of the top quark pair production with respect to the global variables missing transverse energy (ETmiss), jet transverse momentum sum (HT), total observed transverse momentum sum (ST), W-boson transverse mass (MTW) and W-boson transverse momentum (pTW) is presented here using approximately 5.0fb-1 of data from CMS at √s=7TeV and 19.7fb-1 of data at...
Javier Brochero Cifuentes
(Chonbuk National University (KR))
04/03/2015, 19:01
The first measurement of the cross section ratio sigma(t t-bar b b-bar) / sigma(t t-bar jj) is presented using a data sample corresponding to an integrated luminosity of 19.6 inverse femtobarns collected in pp collisions at sqrt(s) = 8 TeV with the CMS detector at the LHC. Events with two leptons (e or mu) and four reconstructed jets, including two identified as b quark jets, in the final...
Ievgen Korol
04/03/2015, 19:02
