Szczegóły publikacji
Opis bibliograficzny
Measurement of the CP-violating phase $\beta$ in $B^{0}\rightarrow J/\psi\pi^{+}\pi^{-}$ decays and limits on penguin effects / R. Aaij, [et al.], M. FIRLEJ, [et al.], T. FIUTOWSKI, [et al.], M. IDZIK, [et al.], W. KUCEWICZ, [et al.], P. MORAWSKI, [et al.], J. MOROŃ, [et al.], A. OBŁĄKOWSKA-MUCHA, [et al.], K. ŚWIENTEK, [et al.], T. SZUMLAK, [et al.] // Physics Letters. B ; ISSN 0370-2693. — 2015 — vol. 742, s. 38–49. — Bibliogr. s. 45–46, Abstr. — W. Kucewicz – dod. afiliacja: Henryk Niewodniczanski Institute of Nuclear Physics
Autorzy (3000)
Dane bibliometryczne
| ID BaDAP | 88182 |
|---|---|
| Data dodania do BaDAP | 2015-03-16 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.physletb.2015.01.008 |
| Rok publikacji | 2015 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp | |
| Creative Commons | |
| Czasopismo/seria | Physics Letters, B |
Abstract
Time-dependent CP violation is measured in the (B-0) over bar -> J/psi pi(+)pi(-) p-channel for each pi(+)pi(-) 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/psi rho(0)(770), is used to measure the CP-violating angle 2 beta(eff) to be (41.7 +/- 9.6(-6.3)(+2.8)).. This result can be used to limit the size of penguin amplitude contributions to CPviolation measurements in, for example, (B-0) over bar -> J/psi pi(+)pi(-) decays. Assuming approximate SU(3) flavour symmetry and neglecting higher order diagrams, the shift in the CP-violating phase phi(s) limited to be within the interval [-1.05 degrees, + 1.18 degrees] at 95% confidence level. Changes to the limit due to SU(3) symmetry breaking effects are also discussed. (C) 2015 The Authors. Published by Elsevier B.V.