QCD corrections to forward-backward charge asymmetries in l- l+ j production at hadron colliders

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dc.creatorPittau, R.
dc.creatordel Aguila, F.
dc.creatorAmetller, Ll.
dc.date2005-11-21
dc.date.accessioned2026-07-07T06:50:05Z
dc.date.available2026-07-07T06:50:05Z
dc.descriptionThe large cross sections for gauge boson production at the Fermilab Tevatron and the CERN Large Hadron Collider (LHC) might give a chance to determine the electroweak parameters with high precision. We calculated two different forward-backward charge asymmetries (A^CS_FB and A^j_FB) of lepton pairs in events with a large transverse momentum jet p p (pbar) -> Z, gamma* + j -> e- e+ j at next-to-leading order (NLO), O(alpha_s) corrections, making use of the Monte Carlo programs MCFM and ALPGEN. These observables could provide a new determination of the weak mixing angle sin^2 theta^lept_eff (M_Z^2) with a statistical precision for each lepton flavour of 10^{-3} (7 x 10^{-3}) at LHC (Tevatron). If b jets are identified, a new asymmetry with respect to the b quark (A^b_FB) can also be measured with a statistical precision of 2 x 10^{-3} (4 x 10^{-2}) at LHC (Tevatron). Finally, we comment on the dependence of our results on various sources of uncertainties and compare, in the case of A^b_FB, the exact result with an approximation that might be more suitable when performing a realistic experimental analysis.
dc.description5 pages, 1 figure, talk presentad by R. Pittau at the International Europhysics Conference on High Energy Physics, July 21st - 27th 2005, Lisbon, Portugal
dc.identifierhttps://arxiv.org/abs/hep-ph/0511243
dc.identifierhttp://arxiv.org/abs/hep-ph/0511243
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/104579
dc.subjectHigh Energy Physics - Phenomenology
dc.titleQCD corrections to forward-backward charge asymmetries in l- l+ j production at hadron colliders
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