Measurement of the CP-violating phase phi(s) in (B)over-bar(s)(0) -> J/psi pi(+)pi(-) decays

LHCb collaboration, S Stone*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


The mixing-induced CP-violating phase phi(s) in B-s(0) and (B) over bar (0)(s) decays is measured using the J / psi pi(+)pi(-) final state in data, taken from 3 fb(-1) of integrated luminosity, collected with the LHCb detector in 7 and 8 TeV centre-of-mass pp collisions at the LHC. A time-dependent flavour-tagged amplitude analysis, allowing for direct CP violation, yields a value for the phase phi(s) = 70 +/- 68 +/- 8 mrad. This result is consistent with the Standard Model expectation and previous measurements. (C) 2014 The Authors. Published by Elsevier B.V.
Original languageEnglish
Pages (from-to)186-195
Number of pages10
JournalPhysics Letters B
Publication statusPublished - 7 Sept 2014
Externally publishedYes


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