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 B? system. Using a fit to the pi(+)pi(-) mass spectrum with interfering resonances gives R-f0/phi equivalent to inverted right perpendicular(B-s(0) -> J/psi f(0) -> pi(+)pi(-)/inverted right perpendicular(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 Jo widths we also find R' equivalent to inverted right perpendicular(B-s(0) -> J/psi pi(+)pi(-),vertical bar m(pi(+)pi(-))-980 MeV vertical bar<90 MeV)/inverted right perpendicular(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.

First observation of B-s(0) -> J/psi f(0)(980) decays / R., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., R. A., C., A. A., A., S., A., Y., A., J., A., J., A., R. B., A., O. A., G., L., A., M., A., E., A., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 698:2(2011), pp. 115-122. [10.1016/j.physletb.2011.03.006]

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

G. Casse;PENSO, Gianni;SARTI, ALESSIO;SCIUBBA, Adalberto;
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 B? system. Using a fit to the pi(+)pi(-) mass spectrum with interfering resonances gives R-f0/phi equivalent to inverted right perpendicular(B-s(0) -> J/psi f(0) -> pi(+)pi(-)/inverted right perpendicular(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 Jo widths we also find R' equivalent to inverted right perpendicular(B-s(0) -> J/psi pi(+)pi(-),vertical bar m(pi(+)pi(-))-980 MeV vertical bar<90 MeV)/inverted right perpendicular(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.
2011
b-s(0) meson; bs0 meson; hadronic b decays; lhc
01 Pubblicazione su rivista::01a Articolo in rivista
First observation of B-s(0) -> J/psi f(0)(980) decays / R., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., R. A., C., A. A., A., S., A., Y., A., J., A., J., A., R. B., A., O. A., G., L., A., M., A., E., A., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 698:2(2011), pp. 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/11573/407649
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