Top quark angular distributions at the LHC

5th International Workshop on Top Quark Physics

Wengler, Thorsten^1

CERN, PH-Department, 1211 Geneva 23, Switzerland^1

关键词: A-center;    Decay products;    Fundamental properties;    New physics;    Polarization state;    Proton proton collisions;    Top quarks;    W bosons;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/452/1/012004/pdf
DOI  :  10.1088/1742-6596/452/1/012004

来源: IOP

【 摘 要 】

Results from the CMS and ATLAS Collaborations are presented on angular distributions in top quark decays. The studies presented here are based on proton-proton collisions at a center of mass energy of 7 TeV collected by the two experiments at the LHC in 2011. The angular distributions of the top quark decay products are used to probe several fundamental properties of the top quark and its couplings. The polarization of produced top quarks is investigated as well as the correlation of the spin of pair-produced top and anti-top quarks. The polarization states of the W-boson originating from the decay of the top quark are determined and used to constrain possible contributions of new physics processes to the W tb vertex.