Conveners
Top I
- Keith Lee
Richard Arthur Wall
(Yale University (US))
07/05/2013, 14:00
Top Physics
parallel talk
Measurements of the top quark production cross sections in proton-proton collisions with the ATLAS detector at the Large Hadron Collider are presented. The measurement require no, one or two electrons or muons in the final state (single lepton, dilepton, hadronic channel). In addition, the decay modes with tau leptons are tested (channels with tau leptons). The main focus are measurements of...
Dr
Andreas Wildauer
(Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) (D)
07/05/2013, 14:15
Top Physics
parallel talk
Measurements of the single top quark production cross sections in proton-proton collisions with the ATLAS detector at the Large Hadron Collider are presented. Measurements of single top-quark production in the t- and Wt-channels are shown and determination of the CKM matrix element |Vtb| is discussed. We also discuss the separate measurement of the top and anti-top quark and the ratio. These...
Boris Lemmer
(Georg-August-Universitaet Goettingen (DE))
07/05/2013, 14:30
Top Physics
parallel talk
Properties of the top quark are measured with the ATLAS detector using LHC proton-proton collisions data.
Measurements of the top-quark mass, charge and polarisation, as well as of the polarization of W bosons in
top quark decays to probe the Wtb-vertex are presented. In addition, measurements of the spin correlation
between top and anti-top quarks as well as of the top-quark charge...
Christopher W. Murphy
(University of California, San Diego)
07/05/2013, 14:45
Top Physics
parallel talk
We computed the bottom quark forward-backward asymmetry at the Tevatron in the Standard Model and for several new physics scenarios. Near the $Z$-pole, the SM bottom asymmetry is dominated by tree level exchanges of electroweak gauge bosons. While above the Z-pole, next-to-leading order QCD dominates the SM asymmetry as was the case with the top quark forward-backward asymmetry. Light new...
Dr
Jun Gao
(Southern Methodist University)
07/05/2013, 15:00
Top Physics
parallel talk
Top quark is a unique probe at the LHC of both testing the standard model of particle physics and searching for new physics beyond. With the high collision energy and luminosity of the LHC, the production and decay of top quark can be measured with the highest precision ever attained. And the theoretical predictions from perturbative calculations are required to match the experimental...
Wei-Chih Huang
(SISSA)
07/05/2013, 15:15
Top Physics
parallel talk
The top asymmetries measured at the Tevatron, and the discrepancy in the di-photon Higgs rate under investigation at the LHC represent two possible hints of physics beyond the Standard Model (SM). In this paper we address the possibility to explain and relate both these experimental anomalies with the help of an extra scalar doublet in addition to the SM particle spectrum. The connection is...
Richard Ruiz
(University of Pittsburgh)
07/05/2013, 15:30
Top Physics
parallel talk
In light of the discovery of a Standard Model (SM)-like Higgs boson, h, at the LHC, we investigate the rare decay of the top quark t → W bh. We find its decay branching fraction to be 1.80 × 10−9 and is several orders of magnitude larger than the loop-induced t → qh transition. We extend the calculation to t → W bH, where H represents the two CP-even and single CP-odd Higgs bosons,...
Hou Keong Lou Lou
(Princeton University)
07/05/2013, 15:45
We propose a new search strategy for high-multiplicity hadronic final states. When new particles are produced at threshold, the distribution of their decay products is approximately isotropic. If there are many partons in the final state, it is likely that several will be clustered into the same large-radius jet. The resulting jet exhibits substructure, even though the parent states are not...
