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Title: Properties of the top quark

Recent measurements of top-quark properties at the LHC and the Tevatron are presented. Most recent measurements of the top quark mass have been carried out by CMS using $19.7/$fb of $$\sqrt{s} = 8$$ TeV data including the study of the dependence on event kinematics. ATLAS uses the full Run I data at $$\sqrt{s} = 7$$ TeV for a "3D" measurement that significantly reduces systematic uncertainties. D0 employs the full Run II data using the matrix element method to measure the top quark mass with significantly reduced systematic uncertainties. Many different measurements of the top quark exist to date and the most precise ones per decay channel per experiment have been combined into the first world combination with a relative precision of 0.44%. Latest updates of measurements of production asymmetries include the measurement of the \ttbar production asymmetry by D0 employing the full Run II data set, by CMS and ATLAS (including the polarization of the top quark) employing both the full data set at $$\sqrt{s} = 7$$ TeV. CMS uses the full $$\sqrt{s} = 8$$ TeV data to measure the top quark polarization in single top production, the ratio $${\cal R}$$ of the branching fractions $${\cal B}(t \rightarrow Wb) / {\cal B}(t \rightarrow Wq)$$ and to search for flavor changing neutral currents. The results from all these measurements agree well with their respective Standard Model expectation.
Authors:
 [1]
  1. Fermilab
Publication Date:
OSTI Identifier:
1326605
Report Number(s):
FERMILAB-CONF-14-339-E; arXiv:1409.7090
1318941
DOE Contract Number:
AC02-07CH11359
Resource Type:
Conference
Resource Relation:
Conference: 2nd Large Hadron Collider Physics Conference, New York City, New York, USA, 06/02-06/07/2014
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS