Measurement of the CP-violating phase Φs in B0 s → J/ψπ+π- decays

LHCb Collaboration

Research output: Contribution to journalArticlepeer-review

54 Scopus citations


Measurement of the mixing-induced CP-violating phase Φs in B0 s decays is of prime importance in probing new physics. Here 7421 ± 105 signal events from the dominantly CP-odd final state J/ψπ+π- are selected in 1 fb-1 of pp collision data collected at √ s = 7 TeV with the LHCb detector. A timedependent fit to the data yields a value of Φs = -0.019+0.173+0.004 -0.174-0.003 rad, consistent with the Standard Model expectation. No evidence of direct CP violation is found.

Original languageEnglish (US)
Pages (from-to)378-386
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number4-5
StatePublished - Jul 18 2012

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


Dive into the research topics of 'Measurement of the CP-violating phase Φs in B0 s → J/ψπ+π- decays'. Together they form a unique fingerprint.

Cite this