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arXiv 1601.04768hep-ex
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在sqrt(s)= 8 TeV的pp碰撞中Drell-Yan轻子对的前后不对称性

Forward-backward asymmetry of Drell-Yan lepton pairs in pp collisions at sqrt(s) = 8 TeV

CMS Collaboration

摘要:

测量了sqrt(s)= 8 TeV pp碰撞中Z/gamma玻色子交换产生的带相反电荷轻子对(μ μ和ee)的前后向不对称性A[FB].该数据样本对应于在LHC上用CMS探测器收集的19.7个反飞秒的积分亮度。A[FB]的测量进行40 GeV和2 TeV之间的双轻子质量和双轻子快度高达5。作为双轻子质量和快度的函数的A[FB]测量值与标准模型的预测进行了比较。

英文摘要:

A measurement of the forward-backward asymmetry A[FB] of oppositely charged lepton pairs (mu mu and e e) produced via Z/gamma* boson exchange in pp collisions at sqrt(s) = 8 TeV is presented. The data sample corresponds to an integrated luminosity of 19.7 inverse femtobarns collected with the CMS detector at the LHC. The measurement of A[FB] is performed for dilepton masses between 40 GeV and 2 TeV and for dilepton rapidity up to 5. The A[FB] measurements as a function of dilepton mass and rapidity are compared with the standard model predictions.

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