2003/08/19 by M. Ciuchini, E. Franco, V. Lubicz +4 · 1 citation
Mathematics · Physics and Astronomy · #B meson #CP violation #Diagonal #Hadron #High-Energy Particle Collisions Research #Lattice (music) #Lattice QCD #Mathematics #Matrix (chemical analysis) #Meson #Nuclear physics #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #hep-ex #hep-lat #hep-ph
paper · pdf · doi:10.1088/1126-6708/2003/08/031
published as JHEP 0308:031,2003 · 25 pages, 7 figures, uses epsfig, typos corrected and reference added
openalex publication_date 2003/08/19 · arxiv created 2003/09/10 · arxiv updated 2011/01/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We compute the next-to-leading order QCD corrections to the off-diagonal elements of the decay-width matrix Gamma entering the neutral B-meson oscillations. From this calculation the width differences DeltaGamma and the CP violation parameters (q/p) of Bd and Bs mesons are estimated, including the complete O(alphas) QCD corrections and the 1/mb contributions. For the width difference DeltaGammas we agree with previous results. By using the lattice determinations of the relevant hadronic matrix elements we obtain the theoretical predictions DeltaGammad/Gammad=(2.42+-0.59) x 10^(-3) and DeltaGammas/Gammas=(7.4+-2.4) x 10^(-2). For the CP violation parameters, we find |(q/p)d|-1=(2.96+-0.67) x 10^(-4) and |(q/p)s|-1=(-1.28+-0.27) x 10^(-5). These predictions are compatible with the experimental measurements which, however, suffer at present from large uncertainties.