Measurements of A_CP(B⁰→ K⁺ π^-) and A_CP(B_s→ π⁺ K^-) at LHCb

2011/06/06 by S. Perazzini, Perazzini, Stefano
Physics and Astronomy · Engineering · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Superconducting Materials and Applications

paper · pdf · doi:10.48550/arxiv.1106.1197

Abstract

The LHCb experiment is designed to perform flavour physics measurements at the Large Hadron Collider. Using data collected during the 2010 run, we reconstruct a sample of H_b→ h⁺h'^- decays, where H_b can be either a B⁰ meson, a B_s⁰ meson or a Λ_b baryon, while h and h^′ stand for π, K or p. We provide preliminary values of the direct CP asymmetries of the neutral B⁰ and B_s⁰ mesons A_CP (B⁰→ K⁺π^-) = -0.074 ± 0.033(stat.) ± 0.008(syst.) and A_CP(B_s⁰→π⁺K^-)=0.15 ± 0.19(stat.) ± 0.02(syst.).

Related

• Study of \itΛ_\itb^\rm0 and \itΞ_\itb^\rm0 decays to \itΛ h⁺h^'- and evidence for CP violation in \itΛ_\itb^\rm0→\itΛ K⁺K^- decays
• Indirect \boldsymbolCP Violation in \boldsymbolD⁰ → h⁺ h^- Decays at LHCb
• Results on direct CP violation in B decays in LHCb
• A search for time-integrated CP violation in D⁰ → h^-h⁺ decays
• Measurement of CP asymmetries in Λ_b⁰→ ph^- decays