Measurement of B_s mixing phase at CDF

2010/11/26 by M. Kreps, Kreps, Michal
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1011.5760

openalex publication_date 2010/11/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

We present improved bounds on the CP-violating phase β_s^\Jpsiϕ and on the decay-width difference ΔΓof the neutral B_s⁰ meson system obtained by the CDF experiment at the Tevatron collider . We use 6500 B_s⁰ --> J/psi phi decays collected by the dimuon trigger and reconstructed in a sample corresponding to integrated luminosity of 5.2 fb-1. Besides exploiting a two-fold increase in statistics with respect to the previous measurement, several improvements have been introduced in the analysis including a fully data-driven flavour-tagging calibration and proper treatment of possible S-wave contributions.

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