About the rapidity and helicity distributions of the W bosons produced at LHC
About the rapidity and helicity distributions of the W bosons produced at LHC
复制标题
关于 LHC 产生的 W 玻色子的速度和螺旋度分布
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
G. Rolandi
中科院分区：
文献类型：
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作者：
E. Manca;O. Cerri;Nicolo Foppiani;G. Rolandi
摘要：在LHC中，从正-倒对称初始态产生了w个玻色子。它们衰变为带电轻子和中微子，具有很强的自旋分析能力。这些效应的结合导致了从不同螺旋度的W+和W−衰变的轻子赝快度的特征分布。这一观测结果为精确测量小横向动量下W玻色子的两种横向偏振态的W+和W−速度分布提供了可能。
A bstractW bosons are produced at LHC from a forward-backward symmetric initial state. Their decay to a charged lepton and a neutrino has a strong spin analysing power. The combination of these effects results in characteristic distributions of the pseudorapidity of the leptons decaying from W+ and W− of different helicity. This observation may open the possibility to measure precisely the W+ and W− rapidity distributions for the two transverse polarisation states of W bosons produced at small transverse momentum.