2005/10/31 by A. Soni, Jure Zupan, J. Zupan
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.75.014024
published as Phys.Rev.D75:014024,2007 · 8 pages, significantly expanded after the observation that both neutral and charged B decays can be used, calculation for decays involving eta' added
arxiv created 2006/08/27 · openalex publication_date 2007/01/26 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We propose a new set of observables that can be used as experimental null tests of the Standard Model in charged and neutral B decays. The CP asymmetries in hadronic decays of charged B mesons into inclusive final states containing at least one of the following mesons: KS,L, \ensuremathη^\ensuremath', cc bound states or neutral K* or D mesons, for all of which a U-spin rotation is equivalent to a CP conjugation, are CKM suppressed and furthermore vanish in the exact U-spin limit. We show how this reduces the theoretical error by using Soft Collinear Effective Theory to calculate the CP asymmetries for KS,LXs+d, K*Xs+d and \ensuremathη^\ensuremath'Xs+d final states in the endpoint region. For these CP asymmetries only the flavor and not the charge of the decaying B meson needs to be tagged up to corrections of NLO in 1/mb, making the measurements more accessible experimentally.