Measurement of $\sin^2\theta_{\rm eff}^{\ell}$ and $Z$-light quark couplings using the forward-backward charge asymmetry in $p\bar{p} \to Z/\gamma^{*} \to e^{+}e^{-}$ events with ${\cal L}=5.0$ fb$^{-1}$ at $\sqrt{s}=1.96$ TeV - INSPIRE

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Measurement of $\sin^2\theta_{\rm eff}^{\ell}$ and $Z$ -light quark couplings using the forward-backward charge asymmetry in $p\bar{p} \to Z/\gamma^{*} \to e^{+}e^{-}$ events with ${\cal L}=5.0$ fb $^{-1}$ at $\sqrt{s}=1.96$ TeV

D0

Collaboration

Apr, 2011

14 pages

Published in:

Phys.Rev.D 84 (2011) 012007

e-Print:

1104.4590 [hep-ex]

DOI:

10.1103/PhysRevD.84.012007

PDG:

\mathit g{}^{{{\mathit d}}}_{\mathit A}

Report number:

FERMILAB-PUB-11-190-E

Experiments:

FNAL-E-0823

View in:

reference search89 citations

Citations per year

Abstract: (arXiv)

We measure the mass dependence of the forward-backward charge asymmetry in 157,553

p\bar{p} \rightarrow Z/\gamma^{*} \rightarrow e^+e^-

interactions, corresponding to 5.0 fb

^{-1}

of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron Collider at

\sqrt{s}=1.96

TeV. The effective weak mixing angle (

\sin^2\theta_{eff}^{lept}

) from this process involving predominantly the first generation of quarks is extracted as

\sin^2\theta_{eff}^{lept} = 0.2309 \pm 0.0008 ({stat.}) \pm 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.

Note:

submitted to Phys. Rev. D, 14 pages, 9 figures

13.38.Dg
14.70.Hp
13.85.Qk
charge: asymmetry
quark: coupling
coupling constant: axial-vector
Z0: hadroproduction
Batavia TEVATRON Coll
Weinberg angle
coupling constant: vector

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