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Indirect measurement of sin2θW (MW) using e+e pairs in the Z-boson region with pp collisions at a center-of-momentum energy of 1.96 TeV

CollaborationWith : Clark, Allan Geoffrey / Lister, Alison / Wu, Xin
Published in Physical Review. D. 2013, vol. 88, no. 07, p. 072002
Abstract Drell-Yan lepton pairs are produced in the process pp→e+e−+X through an intermediate γ*/Z boson. The lepton angular distributions are used to provide information on the electroweak-mixing parameter sin2θW via its observable effective-leptonic sin2θW, or sin2θlepteff. A new method to infer sin2θW or, equivalently, the W-boson mass MW in the on-shell scheme, is developed and tested using a previous CDF Run II measurement of angular distributions from electron pairs in a sample corresponding to 2.1  fb−1 of integrated luminosity from pp collisions at a center-of-momentum energy of 1.96 TeV. The value of sin2θlepteff is found to be 0.2328±0.0011. Within a specified context of the standard model, this results in sin2θW=0.2246±0.0011, which corresponds to a W-boson mass of 80.297±0.055  GeV/c2, in agreement with previous determinations in electron-position collisions and at the Tevatron collider.
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CDF COLLABORATION. Indirect measurement of sin2θW (MW) using e+e pairs in the Z-boson region with pp collisions at a center-of-momentum energy of 1.96 TeV. In: Physical Review. D, 2013, vol. 88, n° 07, p. 072002. https://archive-ouverte.unige.ch/unige:38823

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Deposited on : 2014-07-22

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