Measurements of charge asymmetry using dilepton final states in pp collisions at

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作者：The CMS Collaboration^⋆ ; V. Khachatryan ; A.M. Sirunyan ; A. Tumasyan
关键词：CMS ; Physics ; Top ; Charge asymmetry
刊名：Physics Letters B
出版年：2016
出版时间：10 September 2016
年：2016
卷：760
期：Complete
页码：365-386
全文大小：801 K

文摘

The charge asymmetry in View the MathML source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316303471&_mathId=si1.gif&_user=111111111&_pii=S0370269316303471&_rdoc=1&_issn=03702693&md5=df8c4539be6d7212805606642c1f749e">

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events is measured using dilepton final states produced in ve&_eid=1-s2.0-S0370269316303471&_mathId=si3.gif&_user=111111111&_pii=S0370269316303471&_rdoc=1&_issn=03702693&md5=b38eac1403ee801bff3ce690a5a0f55a" title="Click to view the MathML source">pp

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collisions at the LHC at ve&_eid=1-s2.0-S0370269316303471&_mathId=si2.gif&_user=111111111&_pii=S0370269316303471&_rdoc=1&_issn=03702693&md5=2d9f8d545d9ae356de4c6c608f84f26c">

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verflow="scroll"> \sqrt{s} = 8 TeV

. The data sample, collected with the CMS detector, corresponds to an integrated luminosity of ve&_eid=1-s2.0-S0370269316303471&_mathId=si4.gif&_user=111111111&_pii=S0370269316303471&_rdoc=1&_issn=03702693&md5=50be4ea24228b8c56e3e97b5c8936ece">

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verflow="scroll"> 19.5 {fb}^{- 1}

. The measurements are performed using events with two oppositely charged leptons (electrons or muons) and two or more jets, where at least one of the jets is identified as originating from a bottom quark. The charge asymmetry is measured from differences in kinematic distributions, unfolded to the parton level, of positively and negatively charged top quarks and leptons. The ve&_eid=1-s2.0-S0370269316303471&_mathId=si1.gif&_user=111111111&_pii=S0370269316303471&_rdoc=1&_issn=03702693&md5=df8c4539be6d7212805606642c1f749e">

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and leptonic inclusive charge asymmetries are found to be ve&_eid=1-s2.0-S0370269316303471&_mathId=si5.gif&_user=111111111&_pii=S0370269316303471&_rdoc=1&_issn=03702693&md5=5fdf6c4331508aef22efd22e6903400a">

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verflow="scroll"> 0.011 \pm 0.011 (stat) \pm 0.007 (syst)

and ve&_eid=1-s2.0-S0370269316303471&_mathId=si6.gif&_user=111111111&_pii=S0370269316303471&_rdoc=1&_issn=03702693&md5=a92495d707209bb36fb5bbe69b042d98">

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verflow="scroll"> 0.003 \pm 0.006 (stat) \pm 0.003 (syst)

, respectively. These results, as well as charge asymmetry measurements made as a function of the invariant mass, rapidity, and transverse momentum of the ve&_eid=1-s2.0-S0370269316303471&_mathId=si1.gif&_user=111111111&_pii=S0370269316303471&_rdoc=1&_issn=03702693&md5=df8c4539be6d7212805606642c1f749e">

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system, are in agreement with predictions of the standard model.

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