Measurement of sin<SUP>2</SUP> θ<sub>eff</sub><SUP>lept</SUP> using <i>e</i><SUP>+</SUP><i>e</i><SUP>-</SUP> pairs from γ*/<i>Z</i> bosons produced in <i>p</i>(<i>p</i>)over-bar collisions at a center- of- momentum energy of 1.96 TeV



Aaltonen, T, Amerio, S, Amidei, D, Anastassov, A, Annovi, A, Antos, J, Apollinari, G, Appel, JA, Arisawa, T, Artikov, A
et al (show 386 more authors) (2016) Measurement of sin<SUP>2</SUP> θ<sub>eff</sub><SUP>lept</SUP> using <i>e</i><SUP>+</SUP><i>e</i><SUP>-</SUP> pairs from γ*/<i>Z</i> bosons produced in <i>p</i>(<i>p</i>)over-bar collisions at a center- of- momentum energy of 1.96 TeV. PHYSICAL REVIEW D, 93 (11). 112016-.

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Abstract

At the Fermilab Tevatron proton-antiproton (pp) collider, Drell-Yan lepton pairs are produced in the process pp→e+e-+X through an intermediate γ∗/Z boson. The forward-backward asymmetry in the polar-angle distribution of the e- as a function of the e+e - pair mass is used to obtain sin2θefflept, the effective leptonic determination of the electroweak-mixing parameter sin2θW. The measurement sample, recorded by the Collider Detector at Fermilab (CDF), corresponds to 9.4 fb-1 of integrated luminosity from pp collisions at a center-of-momentum energy of 1.96 TeV, and is the full CDF Run II data set. The value of sin2θefflept is found to be 0.23248±0.00053. The combination with the previous CDF measurement based on μ+μ- pairs yields sin2θefflept=0.23221±0.00046. This result, when interpreted within the specified context of the standard model assuming sin2θW=1-MW2/MZ2 and that the W- and Z-boson masses are on-shell, yields sin2θW=0.22400±0.00045, or equivalently a W-boson mass of 80.328±0.024 GeV/c2.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 26 Jul 2016 15:56
Last Modified: 21 Jun 2024 17:57
DOI: 10.1103/PhysRevD.93.112016
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3002560