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

Aaltonen, T.;Vizan Garcia, Jesús Manuel;The CDF Collaboration;et.al.
(2013) Physical Review. D, Particles, Fields, Gravitation and Cosmology — Vol. 88, n° 7, p. 072002 [19 pages] (2013)

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  • Aaltonen, T.
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  • Vizan Garcia, Jesús ManuelUCLouvain
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  • The CDF Collaboration
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  • et. al.
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 M_W 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 +- 0.0010. Within a specified context of the standard model, this results in sin2θW = 0.2246 +- 0.0009 which corresponds to a W-boson mass of 80.297 +- 0.048 GeV/c^2, in agreement with previous determinations in electron-position collisions and at the Tevatron collider.
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Aaltonen, T., Vizan Garcia, J. M., The CDF Collaboration, & et al. (2013). Indirect measurement of sin2θW (M_W) using e+e- pairs in the Z-boson region with pp¯ collisions at a center-of-momentum energy of 1.96 TeV. Physical Review. D, Particles, Fields, Gravitation and Cosmology, 88(7), 072002 [19 pages]. https://doi.org/10.1103/PhysRevD.88.072002 (Original work published 2013)