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

LHCb Collaboration

Producció científica: Article en revista indexadaArticleAvaluat per experts

24 Cites (Scopus)

Resum

Decays of Bs 0 and B‾0 s mesons into J/ψπ+π final states are studied in a data sample corresponding to 1.9 fb−1 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 ϕs=−0.057±0.060±0.011 rad, the decay-width difference between the heavier mass Bs 0 eigenstate and the B0 meson of −0.050±0.004±0.004 ps−1, and the CP-violating parameter |λ|=1.01−0.06 +0.08±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 ϕs=0.002±0.044±0.012 rad, and |λ|=0.949±0.036±0.019.

Idioma originalAnglès
Número d’article134789
RevistaPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volum797
DOIs
Estat de la publicacióPublicada - 10 d’oct. 2019
Publicat externament

Fingerprint

Navegar pels temes de recerca de 'Measurement of the CP-violating phase ϕs from Bs 0→J/ψπ+π decays in 13 TeV pp collisions'. Junts formen un fingerprint únic.

Com citar-ho