标题:Measurements of normalized differential cross sections for t¯t production in pp collisions at √(s) = 7 TeV using the ATLAS detector
作者:Aad G.; Abajyan T.; Abbott B.; Abdallah J.; Abdel Khalek S.; Abdinov O.; Aben R.; Abi B.;等 更多
作者机构:[Aad, G] CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France;[ Abajyan, T] Physikalisches Institut, University of Bonn, Bonn, Germany;[ Abbo 更多
来源:Physical Review D - Particles, Fields, Gravitation and Cosmology
出版年:2014
卷:90
期:7
DOI:10.1103/PhysRevD.90.072004
摘要:Measurements of normalized differential cross sections for top-quark pair production are presented as a function of the top-quark transverse momentum, and of the mass, transverse momentum, and rapidity of the t¯t system, in proton-proton collisions at a center-of-mass energy of √s = 7 TeV. The data set corresponds to an integrated luminosity of 4.6 fb-1, recorded in 2011 with the ATLAS detector at the CERN Large Hadron Collider. Events are selected in the lepton + jets channel, requiring exactly one lepton and at least four jets with at least one of the jets tagged as originating from a b-quark. The measured spectra are corrected for detector efficiency and resolution effects and are compared to several Monte Carlo simulations and theory calculations. The results are in fair agreement with the predictions in a wide kinematic range. Nevertheless, data distributions are softer than predicted for higher values of the mass of the t¯t system and of the top-quark transverse momentum. The measurements can also discriminate among different sets of parton distribution functions. © Published by the American Physical Society.
收录类别:SCOPUS
Scopus被引频次:46
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940558080&doi=10.1103%2fPhysRevD.90.072004&partnerID=40&md5=9991dfd52c594561d01ec7851e605a67
TOP