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Measurement of the Polarization of W Bosons with Large Transverse Momenta in W plus jets Events at the LHC
CMS Collaboration
2011
发表期刊PHYSICAL REVIEW LETTERS
卷号107期号:2
通讯作者Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
摘要A first measurement of the polarization of W bosons with large transverse momenta in pp collisions is presented. The measurement is based on 36 pb(-1) of data recorded at root s = 7 TeV by the CMS detector at the LHC. The left-handed, right-handed, and longitudinal polarization fractions (f(L), f(R), and f(0), respectively) of W bosons with transverse momenta larger than 50 GeV are determined by using decays to both electrons and muons. The muon final state yields the most precise measurement: (f(L) - f(R))(-) = 0.240 +/- 0.036(syst) +/- 0.031(syst) and f(0)(-) = 0.183 +/- 0.087(stat) +/- 0.123(syst) for negatively charged W bosons and (f(L) - f(R))(+) = 0.310 +/- 0.036(syst) +/- 0.017(syst) and f(0)(+) = 0.171 +/- 0.085(syst) +/- 0.099(syst) for positively charged W bosons. This establishes, for the first time, that W bosons produced in pp collisions with large transverse momenta are predominantly left-handed, as expected in the standard model.
学科领域Physics
DOI10.1103/PhysRevLett.107.021802
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000292516600006
引用统计
被引频次:32[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/213074
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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CMS Collaboration. Measurement of the Polarization of W Bosons with Large Transverse Momenta in W plus jets Events at the LHC[J]. PHYSICAL REVIEW LETTERS,2011,107(2).
APA CMS Collaboration.(2011).Measurement of the Polarization of W Bosons with Large Transverse Momenta in W plus jets Events at the LHC.PHYSICAL REVIEW LETTERS,107(2).
MLA CMS Collaboration."Measurement of the Polarization of W Bosons with Large Transverse Momenta in W plus jets Events at the LHC".PHYSICAL REVIEW LETTERS 107.2(2011).
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