Measurement of sin2 θℓeff and Z-light quark couplings using the forward-backward charge asymmetry in pp -> Z/gamma* -> e+e- events with L=5.0 fb-1 at √s=1.96 TeV

Abazov, V. M.

doi:10.1103/PhysRevD.84.012007

Title: Measurement of sin² θ^ℓ_eff and Z-light quark couplings using the forward-backward charge asymmetry in pp -> Z/gamma^* -> e⁺e^- events with L=5.0 fb^-1 at √s=1.96 TeV

Journal Article · Tue Jul 26 00:00:00 UTC 2011 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI: https://doi.org/10.1103/PhysRevD.84.012007 · OSTI ID:1016225

Abazov, V. M. ^[1]

et al.

We measure the mass dependence of the forward-backward charge asymmetry in 157,553 pp = Z/γ* = e⁺e^- interactions, corresponding to 5.0 fb^-1 of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron Collider at √s = 1.96 TeV. The effective weak mixing angle (θ^ℓ_eff) from this process involving predominantly the first generation of quarks is extracted as sin² θ^ℓ_eff = 0.2309 ± 0.0008 (stat.) ± 0.0006 (syst.). We also present the most precise direct measurement of the vector and axial-vector couplings of u and d quarks to the Z boson.

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Research Organization:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC); USDOE SC Office of High Energy Physics (SC-25)

Contributing Organization:: D0 Collaboration

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1016225

Report Number(s):: FERMILAB-PUB--11-190-E; arXiv eprint number arXiv:1104.4590

Journal Information:: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology Journal Issue: 1 Vol. 84; ISSN 1550-7998

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Measurement of sin2 θℓeff and Z-light quark couplings using the forward-backward charge asymmetry in pp -> Z/gamma* -> e+e- events with L=5.0 fb-1 at √s=1.96 TeV

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References (39)

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Title: Measurement of sin² θ^ℓ_eff and Z-light quark couplings using the forward-backward charge asymmetry in pp -> Z/gamma^* -> e⁺e^- events with L=5.0 fb^-1 at √s=1.96 TeV