A first flavor-tagged measurement of the time-dependent CP-violating asymmetry in Bs0→φφ decays is presented. In this decay channel, the CP-violating weak phase arises due to CP violation in the interference between Bs0-B̄s0 mixing and the b→ss̄s gluonic penguin decay amplitude. Using a sample of pp collision data corresponding to an integrated luminosity of 1.0 fb-1 and collected at a center-of-mass energy of 7 TeV with the LHCb detector, 880 Bs0→φφ signal decays are obtained. The CP-violating phase is measured to be in the interval [-2.46,-0.76] rad at a 68% confidence level. The p value of the standard model prediction is 16%. © 2013 CERN.

First measurement of the CP-violating phase in bs0→φφ decays / Aaij, R., Abellan Beteta, C., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., Anderlini, L., Anderson, J., Andreassen, R., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 110:24(2013), pp. N/A-N/A. [10.1103/PhysRevLett.110.241802]

First measurement of the CP-violating phase in bs0→φφ decays

Bizzeti A.;
2013

Abstract

A first flavor-tagged measurement of the time-dependent CP-violating asymmetry in Bs0→φφ decays is presented. In this decay channel, the CP-violating weak phase arises due to CP violation in the interference between Bs0-B̄s0 mixing and the b→ss̄s gluonic penguin decay amplitude. Using a sample of pp collision data corresponding to an integrated luminosity of 1.0 fb-1 and collected at a center-of-mass energy of 7 TeV with the LHCb detector, 880 Bs0→φφ signal decays are obtained. The CP-violating phase is measured to be in the interval [-2.46,-0.76] rad at a 68% confidence level. The p value of the standard model prediction is 16%. © 2013 CERN.
2013
110
24
N/A
N/A
First measurement of the CP-violating phase in bs0→φφ decays / Aaij, R., Abellan Beteta, C., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., Anderlini, L., Anderson, J., Andreassen, R., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 110:24(2013), pp. N/A-N/A. [10.1103/PhysRevLett.110.241802]
Aaij, R.; Abellan Beteta, C.; Adeva, B.; Adinolfi, M.; Adrover, C.; Affolder, A.; Ajaltouni, Z.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Al...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1209169
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