The time-dependent CP asymmetry in B0->J/PsiRho(770)0 decays is measured using proton-proton collision data corresponding to an integrated luminosity of 6 fb-1, collected with the LHCb detector at a center-of-mass energy of 13 TeV during the years 2015-2018. The CP-violation parameters for this process are determined to be 2betaccbard_{eff}=0.710\pm0.084\pm0.051 rad and |lambda|=1.019\pm0.034\pm0.024, where the first uncertainty is statistical and the second systematic. This constitutes the first observation of time-dependent CP violation in B0->J/PsiRho(770)0 decays. Assuming approximate SU(3) flavor symmetry, these results are combined with the previous consistent LHCb measurement to set the most stringent constraint on the penguin contribution, Deltaphi_s, to the CP-violating phase phi_s in Bs0->J/PsiPhi(1020) decays, yielding Deltaphi_s=5.0\pm4.6 mrad.

Observation of CP Violation in B0 ->J/Psi rho(770)0 Decays

Celestino I.
Membro del Collaboration Group
;
Cordova G.
Membro del Collaboration Group
;
Kleijne N.
Membro del Collaboration Group
;
Morello M. J.
Membro del Collaboration Group
;
Passaro D.
Membro del Collaboration Group
;
Pica L.
Membro del Collaboration Group
;
Riccardi D.
Membro del Collaboration Group
;
Xu A.
Membro del Collaboration Group
;
2026

Abstract

The time-dependent CP asymmetry in B0->J/PsiRho(770)0 decays is measured using proton-proton collision data corresponding to an integrated luminosity of 6 fb-1, collected with the LHCb detector at a center-of-mass energy of 13 TeV during the years 2015-2018. The CP-violation parameters for this process are determined to be 2betaccbard_{eff}=0.710\pm0.084\pm0.051 rad and |lambda|=1.019\pm0.034\pm0.024, where the first uncertainty is statistical and the second systematic. This constitutes the first observation of time-dependent CP violation in B0->J/PsiRho(770)0 decays. Assuming approximate SU(3) flavor symmetry, these results are combined with the previous consistent LHCb measurement to set the most stringent constraint on the penguin contribution, Deltaphi_s, to the CP-violating phase phi_s in Bs0->J/PsiPhi(1020) decays, yielding Deltaphi_s=5.0\pm4.6 mrad.
2026
Settore FIS/01 - Fisica Sperimentale
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
File in questo prodotto:
Non ci sono file associati a questo prodotto.

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/11384/171603
 Attenzione

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

Citazioni
  • ???jsp.display-item.citation.pmc??? 1
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 1
  • OpenAlex 0
social impact