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Title: Measurement of sin2 θeff 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

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 (θeff) from this process involving predominantly the first generation of quarks is extracted as sin2 θeff = 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.
Authors:
 [1]
  1. et al.
Publication Date:
OSTI Identifier:
1016225
Report Number(s):
FERMILAB-PUB--11-190-E
Journal ID: ISSN 1550-7998; arXiv eprint number arXiv:1104.4590; TRN: US1103032
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 84; Journal Issue: 1; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society (APS)
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC); USDOE SC Office of High Energy Physics (SC-25)
Contributing Orgs:
D0 Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; D QUARKS; FERMILAB TEVATRON; LUMINOSITY; QUARKS; VECTORS Experiment-HEP