Measurement of the forward-backward asymmetry in top quark-antiquark production in ppbar collisions using the lepton + jets channel

0441047 - FZÚ 2015 RIV US eng J - Journal Article
Abazov, V. M. - Abbott, B. - Acharya, B.S. - Kupčo, Alexander - Lokajíček, Miloš … Total 365 authors
Measurement of the forward-backward asymmetry in top quark-antiquark production in ppbar collisions using the lepton + jets channel.
Physical Review D: Particles, Fields, Gravitation and Cosmology. Roč. 89, č. 7 (2014), "072011-1"-"072011-16". ISSN 1550-7998
R&D Projects: GA MŠMT(CZ) LG12006
Institutional support: RVO:68378271
Keywords : Batavia TEVATRON Coll * correction * acceptance * kinematics * resolution * anti-p p * interaction * top * pair production * data analysis method * D0
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 4.643, year: 2014

We present a measurement of the forward–backward asymmetry in top quark–antiquark production using the full Tevatron Run II data set collected by the D0 experiment at Fermilab. The measurement is performed in lepton+jets final states using a new kinematic fitting algorithm for events with four or more jets and a new partial reconstruction algorithm for events with only three jets. Corrected for detector acceptance and resolution effects, the asymmetry is evaluated to be AFB=(10.6±3.0)%. Results are consistent with the standard model predictions which range from 5.0% to 8.8%. We also present the dependence of the asymmetry on the invariant mass of the top quark–antiquark system and the difference in rapidities of the top quark and antiquark.
Permanent Link: http://hdl.handle.net/11104/0244095