Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the hadronic decay B-s(0) -> J/psi f(0)(980) is observed. This CP eigenstate mode could be used to measure mixing-induced CP violation in the B0s system. Using a fit to the pi(+)pi(-) mass spectrum with interfering resonances gives R-f0/phi = Gamma(B-s(0) -> J/psi f(0) -> pi(+)pi(-))/Gamma (B-s(0) -> J/psi phi,phi -> K+K-) = 0.252(-0.032-0.033)(+0.046+0.027). In the interval +/- 90 MeV around 980 MeV, corresponding to approximately two full f0 widths we also find R'= Gamma(B-s(0) -> J/psi pi(+)pi(-),| m(pi(+)pi(-))-980 MeV| <90 MeV)/ Gamma(B-s(0) -> J/psi phi,phi -> K+K- )= 0.162 +/- 0.022 +/- 0.016, where in both cases the uncertainties are statistical and systematic, respectively. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.

Aaij, R., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., et al. (2011). First observation of B-s(0) -> J/psi f(0)(980) decays. PHYSICS LETTERS. SECTION B, 698(2), 115-122 [10.1016/j.physletb.2011.03.006].

First observation of B-s(0) -> J/psi f(0)(980) decays

CALVI, MARTA;FANCHINI, ERICA;
2011

Abstract

Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the hadronic decay B-s(0) -> J/psi f(0)(980) is observed. This CP eigenstate mode could be used to measure mixing-induced CP violation in the B0s system. Using a fit to the pi(+)pi(-) mass spectrum with interfering resonances gives R-f0/phi = Gamma(B-s(0) -> J/psi f(0) -> pi(+)pi(-))/Gamma (B-s(0) -> J/psi phi,phi -> K+K-) = 0.252(-0.032-0.033)(+0.046+0.027). In the interval +/- 90 MeV around 980 MeV, corresponding to approximately two full f0 widths we also find R'= Gamma(B-s(0) -> J/psi pi(+)pi(-),| m(pi(+)pi(-))-980 MeV| <90 MeV)/ Gamma(B-s(0) -> J/psi phi,phi -> K+K- )= 0.162 +/- 0.022 +/- 0.016, where in both cases the uncertainties are statistical and systematic, respectively. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.
Articolo in rivista - Articolo scientifico
LHC, Hadronic B decays, B0s meson
English
2011
698
2
115
122
none
Aaij, R., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., et al. (2011). First observation of B-s(0) -> J/psi f(0)(980) decays. PHYSICS LETTERS. SECTION B, 698(2), 115-122 [10.1016/j.physletb.2011.03.006].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/37391
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