The CP violation observables S and C in the decay channel BD+D− are determined from a sample of proton-proton collisions at center-of-mass energies of 7 and 8 TeV, collected by the LHCb experiment and corresponding to an integrated luminosity of 3  fb−1. The observable S describes CPviolation in the interference between mixing and the decay amplitude, and C parametrizes direct CPviolation in the decay. The following values are obtained from a flavor-tagged, decay-time-dependent analysis: S=−0.54+0.17−0.16(stat)±0.05(syst), C=0.26+0.18−0.17(stat)±0.02(syst). These values provide evidence for CP violation at a significance level of 4.0 standard deviations. The phase shift due to higher-order standard model corrections is constrained to a small value of Δϕ=−0.16+0.19−0.21  rad.

Measurement of CP Violation in B0 →d+D- Decays / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 1092-0145. - 117:26(2016). [10.1103/PhysRevLett.117.261801]

Measurement of CP Violation in B0 →d+D- Decays

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2016

Abstract

The CP violation observables S and C in the decay channel BD+D− are determined from a sample of proton-proton collisions at center-of-mass energies of 7 and 8 TeV, collected by the LHCb experiment and corresponding to an integrated luminosity of 3  fb−1. The observable S describes CPviolation in the interference between mixing and the decay amplitude, and C parametrizes direct CPviolation in the decay. The following values are obtained from a flavor-tagged, decay-time-dependent analysis: S=−0.54+0.17−0.16(stat)±0.05(syst), C=0.26+0.18−0.17(stat)±0.02(syst). These values provide evidence for CP violation at a significance level of 4.0 standard deviations. The phase shift due to higher-order standard model corrections is constrained to a small value of Δϕ=−0.16+0.19−0.21  rad.
2016
Charm physics; CP violation; Flavor physics; Hadron-Hadron Scattering; Nuclear and High Energy Physics
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of CP Violation in B0 →d+D- Decays / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 1092-0145. - 117:26(2016). [10.1103/PhysRevLett.117.261801]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074209
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