The CP violation observables S and C in the decay channel B0 → D+ 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 CP violation in the interference between mixing and the decay amplitude, and C parametrizes direct CP violation in the decay. The following values are obtained from a flavor-tagged, decay-time-dependent analysis: S = −0.54{−0.16}{+0.17} (stat) ± 0.05 (syst), C = 0.26{−0.17}{+0.18} (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{−0.21}{+0.19} rad.

Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2016). Measurement of CP Violation in B0 → D+ D− Decays. PHYSICAL REVIEW LETTERS, 117(26), 1-10 [10.1103/PhysRevLett.117.261801].

Measurement of CP Violation in B0 → D+ D− Decays

BETTI, FEDERICO;Capriotti, L.;CARBONE, ANGELO;FERRARI, FABIO;GALLI, DOMENICO;MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZUCCHELLI, STEFANO
2016

Abstract

The CP violation observables S and C in the decay channel B0 → D+ 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 CP violation in the interference between mixing and the decay amplitude, and C parametrizes direct CP violation in the decay. The following values are obtained from a flavor-tagged, decay-time-dependent analysis: S = −0.54{−0.16}{+0.17} (stat) ± 0.05 (syst), C = 0.26{−0.17}{+0.18} (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{−0.21}{+0.19} rad.
2016
Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2016). Measurement of CP Violation in B0 → D+ D− Decays. PHYSICAL REVIEW LETTERS, 117(26), 1-10 [10.1103/PhysRevLett.117.261801].
Aaij, R.; Adeva, B.; Adinolfi, M.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvarez Cartelle, P.; Alv...espandi
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/576121
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 27
  • ???jsp.display-item.citation.isi??? 12
social impact