A measurement of time-dependent CP violation in the decays of B0 and anti-B0 mesons to the final states J/ψ (→ μ+ μ−) K0S, ψ(2S) (→ μ+ μ−) K0S and J/ψ (→ e+ e−) K0S with K0S → π+ π− is presented. The data correspond to an integrated luminosity of 6 fb^−1 collected at a center-of-mass energy of √s = 13 TeV with the LHCb detector. The CP-violation parameters are measured to be S_{ψ K0S} = 0.717 ± 0.013(stat) ± 0.008(syst) and C_{ψ K0S} = 0.008 ± 0.012(stat) ± 0.003(syst). This measurement of S_{ψ K0S} represents the most precise single measurement of the CKM angle β to date and is more precise than the current world average. In addition, measurements of the CP-violation parameters of the individual channels are reported and a combination with the LHCb Run 1 measurements is performed.

Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2024). Measurement of CP Violation in B0 → ψ (→ ℓ+ ℓ−) K0S (→ π+ π−) Decays. PHYSICAL REVIEW LETTERS, 132(2), 1-12 [10.1103/PhysRevLett.132.021801].

Measurement of CP Violation in B0 → ψ (→ ℓ+ ℓ−) K0S (→ π+ π−) Decays

Carbone, A.;Ferrari, F.;Galli, D.;Manuzzi, D.;Patrignani, C.;Spedicato, E.;Villa, A.;Zucchelli, S.;
2024

Abstract

A measurement of time-dependent CP violation in the decays of B0 and anti-B0 mesons to the final states J/ψ (→ μ+ μ−) K0S, ψ(2S) (→ μ+ μ−) K0S and J/ψ (→ e+ e−) K0S with K0S → π+ π− is presented. The data correspond to an integrated luminosity of 6 fb^−1 collected at a center-of-mass energy of √s = 13 TeV with the LHCb detector. The CP-violation parameters are measured to be S_{ψ K0S} = 0.717 ± 0.013(stat) ± 0.008(syst) and C_{ψ K0S} = 0.008 ± 0.012(stat) ± 0.003(syst). This measurement of S_{ψ K0S} represents the most precise single measurement of the CKM angle β to date and is more precise than the current world average. In addition, measurements of the CP-violation parameters of the individual channels are reported and a combination with the LHCb Run 1 measurements is performed.
2024
Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2024). Measurement of CP Violation in B0 → ψ (→ ℓ+ ℓ−) K0S (→ π+ π−) Decays. PHYSICAL REVIEW LETTERS, 132(2), 1-12 [10.1103/PhysRevLett.132.021801].
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Afsharnia, H.; Agapopoulou,...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/11585/954073
 Attenzione

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

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? ND
social impact