A measurement of the decay time-dependent CP-violating asymmetry in Bs0→φφ decays is presented, along with measurements of the T-odd triple-product asymmetries. In this decay channel, the CP-violating weak phase arises from the interference between Bs0-B¯s0 mixing and the loop-induced decay amplitude. Using a sample of proton-proton collision data corresponding to an integrated luminosity of 3.0fb-1 collected with the LHCb detector, a signal yield of approximately 4000 Bs0→φφ decays is obtained. The CP-violating phase is measured to be φs=-0.17±0.15(stat)±0.03(syst)rad. The triple-product asymmetries are measured to be AU=-0.003±0.017(stat)±0.006(syst) and AV=-0.017±0.017(stat)±0.006(syst). Results are consistent with the hypothesis of CP conservation.

Measurement of CP violation in Bs0 →φφ decays / R. a., A., B., A., M., A., A., A., Z., A., S., A., J., A., F., A., M., A., S., A., G., A., P. A., C., A. a., A., S., A., S., A., Y., A., L., A.n., L., A., J., A., R., A., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 90:(2014). [10.1103/PhysRevD.90.052011]

Measurement of CP violation in Bs0 →φφ decays

G. Casse;SARTI, ALESSIO;SCIUBBA, Adalberto;
2014

Abstract

A measurement of the decay time-dependent CP-violating asymmetry in Bs0→φφ decays is presented, along with measurements of the T-odd triple-product asymmetries. In this decay channel, the CP-violating weak phase arises from the interference between Bs0-B¯s0 mixing and the loop-induced decay amplitude. Using a sample of proton-proton collision data corresponding to an integrated luminosity of 3.0fb-1 collected with the LHCb detector, a signal yield of approximately 4000 Bs0→φφ decays is obtained. The CP-violating phase is measured to be φs=-0.17±0.15(stat)±0.03(syst)rad. The triple-product asymmetries are measured to be AU=-0.003±0.017(stat)±0.006(syst) and AV=-0.017±0.017(stat)±0.006(syst). Results are consistent with the hypothesis of CP conservation.
2014
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of CP violation in Bs0 →φφ decays / R. a., A., B., A., M., A., A., A., Z., A., S., A., J., A., F., A., M., A., S., A., G., A., P. A., C., A. a., A., S., A., S., A., Y., A., L., A.n., L., A., J., A., R., A., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 90:(2014). [10.1103/PhysRevD.90.052011]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/665065
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