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

BALDINI, Wander;BOZZI, Concezio;PETRELLA, Antonio;SAVRIE', Mauro;
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
R., Aaij; B., Adeva; M., Adinolfi; C., Adrover; A., Affolder; Z., Ajaltouni; J., Albrecht; F., Alessio; M., Alexander; R. A., Cartelle; A. A., Alves; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1891143
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