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Determination of the CP-violating phase in B0s → J/ψϕ decays at LHCb

2010/06/05 by Greig Cowan, Cowan, Greig A
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1006.1041

openalex publication_date 2010/06/05 · openalex created_date 2024/04/10 · openalex updated_date 2026/07/28

Abstract

Flavour-tagged, time-dependent, angular analysis of the decay B0s → J/ψϕ allows the determination of a CP-violating phase which in the Standard Model is denoted -2βs, and is predicted to be very small. Many models of new physics lead to significant enhancements in the value of this observable. LHCb has the capability to improve significantly the existing experimental knowledge on this phase with the data expected in the 2010 run, and to probe down to the Standard Model prediction within a few years of operation. The steps in this measurement programme will be presented. Discussion will also be given to other methods to determine this phase, and related measurements in the B0s sector.

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