QCD corrections to the forward-backward asymmetries of $c$ and $b$ quarks at the Z pole

D. Abbaneo; P. Antilogus; T. Behnke; S.C. Blyth; M. Elsing; R. Faccini; R.W.L. Jones; K. Mönig; S. Petzold; R. Tenchini

doi:doi:10.1007/s100520050196

EPJ

a
b
d
e
ap
st
h
plus

2020 Impact factor 4.590

Particles and Fields

Eur. Phys. J. C 4, 185-191
DOI 10.1007/s100529800890

QCD corrections to the forward-backward asymmetries of c and b quarks at the Z pole

D. Abbaneo¹ - P. Antilogus² - T. Behnke¹ - S.C. Blyth³ - M. Elsing¹ - R. Faccini⁴ - R.W.L. Jones⁵ - K. Mönig¹ - S. Petzold⁶ - R. Tenchini⁷

¹ CERN, CH-1211, Geneva 23, Switzerland
² Université Claude Bernard de Lyon, IPNL, IN2P3-CNRS, F-69622 Villeurbanne Cedex, France
³ Carnegie Mellon University, Pittsburgh, PA 15213, USA
⁴ INFN Sezione di Roma and University of Rome ``La Sapienza'', I-00185 Rome, Italy
⁵ Department of Physics, University of Lancaster, Lancaster LA1 4YB, UK
⁶ Universität Hamburg/DESY, II Institut für Experimental Physik, Notkestrasse 85, D-22607 Hamburg, Germany
⁷ INFN Sezione di Pisa, I-56010 Pisa, Italy

Received: 26 February 1998 / Published online: 2 June 1998

Abstract
Measurements of the forward-backward production asymmetry of heavy quarks in Z decays provide a precise determination of $\sin^2\!\theta_{\rm{W,eff}}^{\rm {lept}}$ . The asymmetries are sensitive to QCD effects, in particular hard gluon radiation. In this paper QCD corrections for $A_{\mathrm{FB}}^{{b\bar{b}}}$ and $A_{\mathrm{FB}}^{{c\bar{c}}}$ are discussed. The interplay between the experimental techniques used to measure the asymmetries and the QCD effects is investigated using simulated events. A procedure to estimate the correction needed for experimental measurements is proposed, and some specific examples are given.