2005/11/21 by R. Pittau, Pittau, R., F. del Águila +4
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0511243
5 pages, 1 figure, talk presentad by R. Pittau at the International Europhysics Conference on High Energy Physics, July 21st - 27th 2005, Lisbon, Portugal
arxiv created 2005/11/21 · openalex publication_date 2005/11/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
The 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 (ACSFB and AjFB) 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(alphas) corrections, making use of the Monte Carlo programs MCFM and ALPGEN. These observables could provide a new determination of the weak mixing angle sin2 thetalepteff (MZ2) 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 (AbFB) 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 AbFB, the exact result with an approximation that might be more suitable when performing a realistic experimental analysis.