We present a study of Ξ0c→Ξ0π0, Ξ0c→Ξ0η, and Ξ0c→Ξ0η′ decays using the Belle and Belle~II data samples, which have integrated luminosities of 980 fb−1 and 426 fb−1, respectively. We measure the following relative branching fractions B(Ξ0c→Ξ0π0)/B(Ξ0c→Ξ−π+)=0.48±0.02(stat)±0.03(syst), B(Ξ0c→Ξ0η)/B(Ξ0c→Ξ−π+)=0.11±0.01(stat)±0.01(syst), B(Ξ0c→Ξ0η′)/B(Ξ0c→Ξ−π+)=0.08±0.02(stat)±0.01(syst) for the first time, where the uncertainties are statistical (stat) and systematic (syst). By multiplying by the branching fraction of the normalization mode, B(Ξ0c→Ξ−π+), we obtain the following absolute branching fraction results (6.9±0.3(stat)±0.5(syst)±1.3(norm))×10−3, (1.6±0.2(stat)±0.2(syst)±0.3(norm))×10−3, and (1.2±0.3(stat)±0.1(syst)±0.2(norm))×10−3, for Ξ0c decays to Ξ0π0, Ξ0η, and Ξ0η′ final states, respectively. The third errors are from the uncertainty on B(Ξ0c→Ξ−π+). The asymmetry parameter for Ξ0c→Ξ0π0 is measured to be α(Ξ0c→Ξ0π0)=−0.90±0.15(stat)±0.23(syst).

Measurements of the branching fractions of Ξ0c→Ξ0π0, Ξ0c→Ξ0η, and Ξ0c→Ξ0η′ and asymmetry parameter of Ξ0c→Ξ0π0

Bertacchi, V.;Bettarini, S.;Casarosa, G.;Corona, L.;Forti, F.;Massaccesi, L.;Rizzo, G.;Tenchini, F.;
2024-01-01

Abstract

We present a study of Ξ0c→Ξ0π0, Ξ0c→Ξ0η, and Ξ0c→Ξ0η′ decays using the Belle and Belle~II data samples, which have integrated luminosities of 980 fb−1 and 426 fb−1, respectively. We measure the following relative branching fractions B(Ξ0c→Ξ0π0)/B(Ξ0c→Ξ−π+)=0.48±0.02(stat)±0.03(syst), B(Ξ0c→Ξ0η)/B(Ξ0c→Ξ−π+)=0.11±0.01(stat)±0.01(syst), B(Ξ0c→Ξ0η′)/B(Ξ0c→Ξ−π+)=0.08±0.02(stat)±0.01(syst) for the first time, where the uncertainties are statistical (stat) and systematic (syst). By multiplying by the branching fraction of the normalization mode, B(Ξ0c→Ξ−π+), we obtain the following absolute branching fraction results (6.9±0.3(stat)±0.5(syst)±1.3(norm))×10−3, (1.6±0.2(stat)±0.2(syst)±0.3(norm))×10−3, and (1.2±0.3(stat)±0.1(syst)±0.2(norm))×10−3, for Ξ0c decays to Ξ0π0, Ξ0η, and Ξ0η′ final states, respectively. The third errors are from the uncertainty on B(Ξ0c→Ξ−π+). The asymmetry parameter for Ξ0c→Ξ0π0 is measured to be α(Ξ0c→Ξ0π0)=−0.90±0.15(stat)±0.23(syst).
2024
Adachi, I.; Aggarwal, L.; Aihara, H.; Akopov, N.; Aloisio, A.; Althubiti, N.; Anh Ky, N.; Asner, D. M.; Atmacan, H.; Aushev, T.; Aushev, V.; Aversano,...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/1274465
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