Measurements of the charge asymmetry in top-quark pair production in the dilepton final state at root s=8 TeV with the ATLAS detectorVisa övriga samt affilieringar
2016 (Engelska)Ingår i: Physical Review D, ISSN 2470-0010, Vol. 94, nr 3, artikel-id 032006Artikel i tidskrift (Refereegranskat) Published
Abstract [en]
Measurements of the top-antitop quark pair production charge asymmetry in the dilepton channel, characterized by two high-p(T) leptons (electrons or muons), are presented using data corresponding to an integrated luminosity of 20.3 fb(-1) from pp collisions at a center-of-mass energy root s = 8 TeV collected with the ATLAS detector at the Large Hadron Collider at CERN. Inclusive and differential measurements as a function of the invariant mass, transverse momentum, and longitudinal boost of the tt system arc performed both in the full phase space and in a fiducial phase space closely matching the detector acceptance. Two observables are studied: A(c)(ll) based on the selected leptons and A(c)(tt) based on the reconstructed tt final state. The inclusive asymmetries are measured in the full phase space to be A(c)(ll)= 0.008 +/- 0.006 and A(c)(tt)= 0.021 +/- 0.016, which are in agreement with the Standard Model predictions of A(c)(ll)= 0.0064 +/- 0.0003 and A(c)(tt)= 0.0111 +/- 0.0004.
Ort, förlag, år, upplaga, sidor
2016. Vol. 94, nr 3, artikel-id 032006
Nationell ämneskategori
Astronomi, astrofysik och kosmologi
Identifikatorer
URN: urn:nbn:se:uu:diva-312813DOI: 10.1103/PhysRevD.94.032006ISI: 000381893100002OAI: oai:DiVA.org:uu-312813DiVA, id: diva2:1064827
Anmärkning
ATLAS Collaboration, for complete list of authors see https://doi.org/10.1103/PhysRevD.94.032006
2017-01-132017-01-132017-01-13Bibliografiskt granskad