- Jared Evans ()
Lukas Alexander Heinrich (New York University (US))
The top quark pair production cross-section is a strong test of the Standard Model. Measurements of both the total and differential cross section with the ATLAS detector at the LHC performed using data with center-of-mass energies of 7 and 8 TeV are presented. The analyses were with on final states featuring no, one or two high-$p_T$ electrons or muons. Additionally analyses with...
Mr Jun Su (PITT)
Single Top production with ATLAS detector at LHC @7TeV 8TeV summary.
Daniel Noonan (University of Kansas (US))
Measurements of single top quark production are presented, performed using CMS data collected in 2011 and 2012 at centre-of-mass energies of 7 and 8 TeV. The cross sections for the electroweak production of single top quarks in the t-channel and in association with W-bosons are measured and the results are used to place constraints on the CKM matrix element Vtb. In the t-channel the ratio of...
Yanjun Tu (Univ. of California San Diego (US))
Measurements of several top-quark properties are presented, obtained from the CMS data collected in 2011 and 2012 at centre-of-mass energies of 7 and 8 TeV. The results include measurements of the top pair charge asymmetry, the W helicity in top decays, the top quark charge, and of the ttbar spin correlation and the search for anomalous couplings. The results are compared with predictions from...
Olga Bylund (Stockholm University)
The top quark is the heaviest elementary particle and the only quark that decays before hadronizing. Properties of the top quark constitute important tests of the Standard Model and constrain models of new physics. Measurements of top quark properties by ATLAS using proton-proton collisions in the LHC at sqrt s = 7 TeV are presented, as well as combinations of results by ATLAS, CMS and the...
Cen Zhang (CP3 Université catholique de Louvain)
Top quark processes potentially suffer from a large uncertainty at leading order in QCD. To search for new physics in top quark processes, it is desirable to have a model-independent approach at the NLO accuracy. Effective field theory provides a framework in which the radiative corrections to new interactions can be consistently included, but the analysis can be complicated due to operator...
Eleni Petrakou (National Taiwan University (TW))
In many models of physics beyond the Standard Model the coupling of new physics to third generation quarks is enhanced and signatures are expected that mimic top production. We present a review of non-MSSM based searches for new physics beyond the standard model in final states containing top quarks and/or bottom quarks. This includes searches for heavy gauge bosons, excited quarks, chiral and...
Jeff Dror (Cornell University)
If new TeV scale particles are discovered, it will be important to determine their lifetimes. There is, however, a 12 order of magnitude range, where we cannot measure particle lifetimes. For a heavy quark with a long lifetime, hadronization depolarizes the particle and thus, in principle, the amount of depolarization can be used to probe the lifetime in the problematic region. In this...