Measurement of the CP-violating phase β in B0→J/ψπ+π− decays and limits on penguin effects - Centre de Physique des Particules de Marseille Accéder directement au contenu
Article Dans Une Revue Physics Letters B Année : 2015

Measurement of the CP-violating phase β in B0→J/ψπ+π− decays and limits on penguin effects

J. Cogan
O. Leroy
J. Serrano

Résumé

Time-dependent CP violation is measured in the B0→J/ψπ+π− channel for each π+π− resonant final state using data collected with an integrated luminosity of 3.0 fb−1 in pp collisions using the LHCb detector. The final state with the largest rate, J/ψρ0(770), is used to measure the CP-violating angle 2βeff to be (41.7±9.6+2.8−6.3)∘. This result can be used to limit the size of penguin amplitude contributions to CP violation measurements in, for example, B0s→J/ψϕ decays. Assuming approximate SU(3) flavour symmetry and neglecting higher order diagrams, the shift in the CP-violating phase ϕs is limited to be within the interval [−1.05∘, +1.18∘] at 95% confidence level. Changes to the limit due to SU(3) symmetry breaking effects are also discussed.
Fichier principal
Vignette du fichier
1-s2.0-S0370269315000106-main.pdf (825.85 Ko) Télécharger le fichier
Origine : Publication financée par une institution
Loading...

Dates et versions

in2p3-01081128 , version 1 (26-02-2015)

Identifiants

Citer

R. Aaij, Y. Amhis, S. Barsuk, M. Borsato, O. Kochebina, et al.. Measurement of the CP-violating phase β in B0→J/ψπ+π− decays and limits on penguin effects. Physics Letters B, 2015, 742, pp.38-49. ⟨10.1016/j.physletb.2015.01.008⟩. ⟨in2p3-01081128⟩
91 Consultations
42 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More