Using data collected with the LHCb detector in proton–proton collisions at a centre-of-mass energy of 7 TeV, the hadronic decay B0s → J/psi f0(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/ϕ) ≡ Γ(B0s → J/Psi f0 , f0 → pi+ pi-) / Γ(B0s → 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(B0s → J/ψ pi+ pi- , |m(pi+ pi-) - 980 MeV| < 90 MeV) / Gamma(B0s → J/psi Phi , Phi → K+ K-) = 0.162 ± 0.022 ± 0.016 , where in both cases the uncertainties are statistical and systematic, respectively.

First observation of Bs0→J/Ψf0(980) decays / R., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., P. A., C., A. A. J., R., S., A., Y., A., J., A., J., A., R., A., O. A., G., L., A., M., A., E., A., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 698:2(2011), pp. 115-122. [10.1016/j.physletb.2011.03.006]

First observation of Bs0→J/Ψf0(980) decays

BIZZETI, Andrea;
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 B0s → J/psi f0(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/ϕ) ≡ Γ(B0s → J/Psi f0 , f0 → pi+ pi-) / Γ(B0s → 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(B0s → J/ψ pi+ pi- , |m(pi+ pi-) - 980 MeV| < 90 MeV) / Gamma(B0s → J/psi Phi , Phi → K+ K-) = 0.162 ± 0.022 ± 0.016 , where in both cases the uncertainties are statistical and systematic, respectively.
2011
698
2
115
122
First observation of Bs0→J/Ψf0(980) decays / R., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., P. A., C., A. A. J., R., S., A., Y., A., J., A., J., A., R., A., O. A., G., L., A., M., A., E., A., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 698:2(2011), pp. 115-122. [10.1016/j.physletb.2011.03.006]
R., Aaij; B., Adeva; M., Adinolfi; C., Adrover; A., Affolder; Z., Ajaltouni; J., Albrecht; F., Alessio; M., Alexander; P. A., Cartelle; A. A. J., R.; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/703159
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