Measurement of sin .sup.2./sup.θ.sup.l./sup..sub.eff./sub. and Z-light quark couplings using the forward-backward charge asymmetry in ppbar -> Z/gamma* -> e.sup.+./sup.e.sup.-./sup. events with L=5.0 fb.sup.-1./sup. at root s=1.96 TeV

0367741 - FZÚ 2013 RIV US eng J - Journal Article
Abazov, V. M. - Abbott, B. - Abolins, M. - Kupčo, Alexander - Lokajíček, Miloš … Total 421 authors
Measurement of sin ²θ^l_eff and Z-light quark couplings using the forward-backward charge asymmetry in ppbar -> Z/gamma* -> e⁺e^- events with L=5.0 fb^-1 at root s=1.96 TeV.
Physical Review D: Particles, Fields, Gravitation and Cosmology. Roč. 84, č. 1 (2011), "012007-1"-"012007-14". ISSN 1550-7998
R&D Projects: GA MŠMT LA08047
Institutional research plan: CEZ:AV0Z10100502
Keywords : D0 * Tevatron * asymmetry * quark * Weinberg angle * electron positron * Z0
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 4.558, year: 2011

We measure the mass dependence of the forward-backward charge asymmetry in 157 553 p (p) over bar -> Z/gamma* -> e(+)e(-) interactions, corresponding to 5.0 fb(-1) of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron Collider at root s = 1.96 TeV. The effective weak mixing angle (theta(l)(eff)) from this process involving predominantly the first generation of quarks is extracted as sin(2)theta(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.
Permanent Link: http://hdl.handle.net/11104/0202305