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Title

Measurement of the CP-violating phase ϕs from Bs 0→J/ψπ+π− decays in 13 TeV pp collisions

AuthorsGarcía Martín, L. M.; Henry, L.; Jashal, B.; Martínez-Vidal, Fernando ; Oyanguren, Arantza ; Remón Alepuz, Clara; Ruiz Vidal, Joan; Sánchez Mayordomo, Carlos ; LHCb Collaboration
Issue DateOct-2019
PublisherElsevier BV
CitationPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 797 (2019)
AbstractDecays of B and B‾ mesons into J/ψππ final states are studied in a data sample corresponding to 1.9 fb of integrated luminosity collected with the LHCb detector in 13 TeV pp collisions. A time-dependent amplitude analysis is used to determine the final-state resonance contributions, the CP-violating phase ϕ=−0.057±0.060±0.011 rad, the decay-width difference between the heavier mass B eigenstate and the B meson of −0.050±0.004±0.004 ps, and the CP-violating parameter |λ|=1.01 ±0.03, where the first uncertainty is statistical and the second systematic. These results are combined with previous LHCb measurements in the same decay channel using 7 TeV and 8 TeV pp collisions obtaining ϕ=0.002±0.044±0.012 rad, and |λ|=0.949±0.036±0.019.
URIhttp://hdl.handle.net/10261/196559
Identifiersdoi: 10.1016/j.physletb.2019.07.036
issn: 0370-2693
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