Event calendar file
25-30 September 2011
Sant Feliu de Guixols, Spain
Europe/Madrid timezone
- top2011@ifae.es
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We present U(1) flavor models for leptophobic Z' with flavor dependent couplings to the right-handed up-type quarks in the Standard Model,
which can accommodate the recent data on the top forward-backward (FB)
asymmetry and the dijet resonance associated with a W boson
reported by CDF Collaboration.
Such flavor-dependent leptophobic charge assignments generally require
extra chiral fermions f
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Presented by Dr. Chaehyun YU
The measurement of the top quark pair cross section at the LHC is important for diverse reasons. The measurement on its own is a test of the Standard Model as well as a benchmark for the theoretical calculations. This poster describes the combined measurement of the tt ̄ cross section, using b-tagging, and the b-tagging efficiency using the muon+jets event topology observed by the CMS experiment
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Presented by Michael MAES
In high energy collider physics, some topology cannot be fully reconstructed using the detector information only. Some techniques like kinematical fitting (KF) or matrix weighted template (MWT) have been developed to handle this difficulty. This is for instance the case for topologies arising from top quark pair production, when two leptons are present in the final state together with two neutrino
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Presented by Mr. arnaud PIN
The top quark mass in the pole and MSbar definition is determined based on the measured cross section in the dilepton channel compared to three different approximate NNLO QCD calculations. The analysed dataset corresponds to an integrated luminosity of 1.14 fb-1 collected by the CMS experiment in 2011 in pp collisions at sqrt(s) of 7 TeV.
Presented by Maria ALDAYA MARTIN
We present a search for fourth generation chiral quarks of the up- and down-type
in 7 TeV proton collisions recorded by the CMS experiment at the LHC. Final state
topologies with b' and t' quarks produced singly or in pairs are studied in the 2011
data corresponding to an integrated luminosity of 1.1 fb^{-1}. Degenerate masses are
assumed for the fourth generation quarks. The inclusive search
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Presented by Petra VAN MULDERS
First normalized differential cross sections in top quark pair events are presented. All results are based on pp-collision data at a center-of-mass energy of 7 TeV recorded in 2011 by the CMS detector. The measurements are performed in the semileptonic and dileptonic decay modes of the top quark pair with events containing either one or two isolated leptons (electrons or muons), missing transverse
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Presented by Dr. Thomas HERMANNS
The measurement of the charge asymmetry in top quark pair production can be an important window on new physics, as in some Beyond Standard Model theories this asymmetry is significantly enhanced with respect to Standard Model prediction. The measurements performed by the ATLAS collaboration with pp collision data recorded in 2011 will be presented. The analysis has been performed in the semilepton
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Presented by Maria Ilaria BESANA
A measurement of the mass difference between the top quark and the antitop quark (∆mt = mt − mt ) is performed using events with a muon and at least four jets in the muon+jets final state. Data collected in 2011 with the CMS detector at the LHC and corresponding to an integrated luminosity of 1.09 fb−1 are analyzed. The measured value of ∆mt = −1.2 ± 1.2 (stat.) ± 0.5 (syst.) GeV is co
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Presented by Mr. Stijn BLYWEERT
We present studies on the three single top production modes (s, t, Wt channels) carried out with 0.70/fb of integrated luminosity collected by the ATLAS detector during the 2011 LHC run. The t-channel production cross section is measured by two different techniques, a cut-based approach and a multivariate discriminant constructed with a neural network. The cut-based analysis combines 2- and 3-je
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Presented by Barbara ALVAREZ
We present a measurement of the tt production cross section with the ATLAS detector in proton-proton collisions at √s= 7 TeV, using events containing an isolated µ and a τ lepton decaying hadronically. The analysis utilizes a multivariate technique based on boosted decision trees to identify τ leptons. Backgrounds are measured using a method that combines charge subtraction and template fitt
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Presented by Jacob SEARCY
Presented by Ford GARBERSON
on
26 Sep 2011
at
12:15
Presented by Jason SLAUNWHITE
on
26 Sep 2011
at
12:45
Charged Higgs bosons are predicted by various theories beyond the Standard
Model, which include e.g. an additional Higgs doublet. In the low-mass range,
charged Higgs bosons can be produced in the decay of top quarks via t -> bH+,
where H+ may then decay into c+sbar or tau+nu. We report on searches for a
charged Higgs boson in ATLAS using the LHC data for both decay channels.
Presented by Patrick CZODROWSKI
Presented by Emanuele RE
on
26 Sep 2011
at
11:45
We present a measurement of the top quark pair production cross section using CMS data collected in 2011 at a center-of-mass energy of 7TeV. The cross section measurement is performed in the semi-leptonic final state with events containing one lepton, either a muon or an electron, missing transverse energy and jets. The measured cross section is compared with higher order QCD calculations.
Presented by Sinéad WALSH
We present a measurement of the electric charge of the top quark in the lepton+jets final states using 0.70/fb of data accumulated in the ATLAS experiment at a center of mass energy of 7 TeV. The top quark charge measurement is based on reconstructing the charges of the top quark decay products. While we determined the charge of the W boson through its leptonic decay, the b-quark charge is not dir
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Presented by Pavol FEDERIC
Presented by Peter UWER
on
26 Sep 2011
at
11:15
We study top-(anti)quark pair production at the Tevatron and Large Hadron Collider (LHC) in the context of the Minimal Length Scenario (MLS) of the Arkani-Hamed, Dimopoulos and Dvali (ADD) model of extra dimensions (XDs). We show that sizable effects onto both the integrated and differential cross section due to graviton mediation are expected for a String scale, M_S, of O(1-10TeV) and several XDs
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Presented by Mr. Ken MIMASU
