Determination of the CP-violating phase in $B^0_s \to J/ψφ$ decays at LHCb

Details Determination of the CP-violating phase in $B^0_s \to J/ψφ$ decays at LHCb Determination of the CP-violating phase in $B^0_s \to J/ψφ$ decays at LHCb

2010-06-05

arxiv.org/abs/1006.1041v1

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, 5 figures. LHCb contribution to the proceedings of the 2010 Lake Louise Winter Institute

Scientific paper

Flavour-tagged, time-dependent, angular analysis of the decay $B^0_s \to J/\psi \phi$ allows the determination of a CP-violating phase which in the Standard Model is denoted $-2\beta_s$, 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 $B^0_s$ sector.

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