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Title: Measurement of the charge asymmetry in top quark pair production in pp collisions at root s=7 TeV using the ATLAS detector

Abstract

A measurement of the top-antitop production charge asymmetry A{sub C} is presented using data corresponding to an integrated luminosity of 1.04 fb{sup -1} of pp collisions at {radical}s = 7 TeV collected by the ATLAS detector at the LHC. Events are selected with a single lepton (electron or muon), missing transverse momentum and at least four jets of which at least one jet is identified as coming from a b-quark. A kinematic fit is used to reconstruct the t{bar t} event topology. After background subtraction, a Bayesian unfolding procedure is performed to correct for acceptance and detector effects. The measured value of A{sub C} is A{sub C} = -0.019 {+-} 0.028 (stat.) {+-} 0.024 (syst.), consistent with the prediction from the MC{at}NLO Monte Carlo generator of A{sub C} = 0.006 {+-} 0.002. Measurements of A{sub C} in two ranges of invariant mass of the top-antitop pair are also shown.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE SC OFFICE OF SCIENCE (SC)
OSTI Identifier:
1050967
Report Number(s):
BNL-98477-2012-JA
KA1101021; TRN: US1204747
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
European Physical Journal C
Additional Journal Information:
Journal Volume: 72; Journal Issue: 6
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; DATA; FORECASTING; LEPTONS; LUMINOSITY; PAIR PRODUCTION; PRODUCTION; T QUARKS; TOPOLOGY; TRANSVERSE MOMENTUM

Citation Formats

Aad, G, Abbott, B, Abdallah, J, Abdelalim, A A, Abdesselam, A, Abdinov, O, Abi, B, Abolins, M, AbouZeid, O S, Abramowicz, H, Abreu, H, Acerbi, E, Acharya, B S, Adamczyk, L, Adams, D L, Addy, T N, Adelman, J, Aderholz, M, Adomeit, S, and et al. Measurement of the charge asymmetry in top quark pair production in pp collisions at root s=7 TeV using the ATLAS detector. United States: N. p., 2012. Web.
Aad, G, Abbott, B, Abdallah, J, Abdelalim, A A, Abdesselam, A, Abdinov, O, Abi, B, Abolins, M, AbouZeid, O S, Abramowicz, H, Abreu, H, Acerbi, E, Acharya, B S, Adamczyk, L, Adams, D L, Addy, T N, Adelman, J, Aderholz, M, Adomeit, S, & et al. Measurement of the charge asymmetry in top quark pair production in pp collisions at root s=7 TeV using the ATLAS detector. United States.
Aad, G, Abbott, B, Abdallah, J, Abdelalim, A A, Abdesselam, A, Abdinov, O, Abi, B, Abolins, M, AbouZeid, O S, Abramowicz, H, Abreu, H, Acerbi, E, Acharya, B S, Adamczyk, L, Adams, D L, Addy, T N, Adelman, J, Aderholz, M, Adomeit, S, and et al. Fri . "Measurement of the charge asymmetry in top quark pair production in pp collisions at root s=7 TeV using the ATLAS detector". United States.
@article{osti_1050967,
title = {Measurement of the charge asymmetry in top quark pair production in pp collisions at root s=7 TeV using the ATLAS detector},
author = {Aad, G and Abbott, B and Abdallah, J and Abdelalim, A A and Abdesselam, A and Abdinov, O and Abi, B and Abolins, M and AbouZeid, O S and Abramowicz, H and Abreu, H and Acerbi, E and Acharya, B S and Adamczyk, L and Adams, D L and Addy, T N and Adelman, J and Aderholz, M and Adomeit, S and et al.},
abstractNote = {A measurement of the top-antitop production charge asymmetry A{sub C} is presented using data corresponding to an integrated luminosity of 1.04 fb{sup -1} of pp collisions at {radical}s = 7 TeV collected by the ATLAS detector at the LHC. Events are selected with a single lepton (electron or muon), missing transverse momentum and at least four jets of which at least one jet is identified as coming from a b-quark. A kinematic fit is used to reconstruct the t{bar t} event topology. After background subtraction, a Bayesian unfolding procedure is performed to correct for acceptance and detector effects. The measured value of A{sub C} is A{sub C} = -0.019 {+-} 0.028 (stat.) {+-} 0.024 (syst.), consistent with the prediction from the MC{at}NLO Monte Carlo generator of A{sub C} = 0.006 {+-} 0.002. Measurements of A{sub C} in two ranges of invariant mass of the top-antitop pair are also shown.},
doi = {},
url = {https://www.osti.gov/biblio/1050967}, journal = {European Physical Journal C},
number = 6,
volume = 72,
place = {United States},
year = {2012},
month = {6}
}