We report a measurement of the CP-violating parameters C and S in B0→KS0π0 decays at Belle II using a sample of 387×106 BB¯ events recorded in e+e- collisions at a center-of-mass energy corresponding to the ϒ(4S) resonance. These parameters are determined by fitting the proper decay-time distribution of a sample of 415 signal events. We obtain C=-0.04-0.15+0.14±0.05 and S=0.75-0.23+0.20±0.04, where the first uncertainties are statistical and the second are systematic.

Measurement of 𝐶⁢𝑃 Violation in 𝐵0 →𝐾0𝑆⁢𝜋0 Decays at Belle II

Bianchi, F.;Das, S.;Destefanis, M.;Maggiora, M.;Marcello, S.;Spataro, S.;
2023-01-01

Abstract

We report a measurement of the CP-violating parameters C and S in B0→KS0π0 decays at Belle II using a sample of 387×106 BB¯ events recorded in e+e- collisions at a center-of-mass energy corresponding to the ϒ(4S) resonance. These parameters are determined by fitting the proper decay-time distribution of a sample of 415 signal events. We obtain C=-0.04-0.15+0.14±0.05 and S=0.75-0.23+0.20±0.04, where the first uncertainties are statistical and the second are systematic.
2023
131
11
111803-1
111803-8
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.131.111803
Hadronic decays, Bottom mesons, CP violation, Lepton colliders
Adachi, I.; Adamczyk, K.; Aggarwal, L.; Ahmed, H.; Aihara, H.; Akopov, N.; Aloisio, A.; Anh Ky, N.; Asner, D. M.; Atmacan, H.; Aushev, T.; Aushev, V.;...espandi
File in questo prodotto:
File Dimensione Formato  
PhysRevLett.131.111803.pdf

Accesso aperto

Descrizione: paper
Tipo di file: PDF EDITORIALE
Dimensione 347.86 kB
Formato Adobe PDF
347.86 kB Adobe PDF Visualizza/Apri

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/2318/2069015
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 7
  • ???jsp.display-item.citation.isi??? 2
social impact