We measure the B0 lifetime and flavor-oscillation frequency using B0 → Dð Þ− π þ decays collected by the Belle II experiment in asymmetric-energy eþ e− collisions produced by the SuperKEKB collider operating at the ϒð4SÞ resonance. We fit the decay-time distribution of signal decays, where the initial flavor is determined by identifying the flavor of the other B meson in the event. The results, based on 33000 signal decays reconstructed in a data sample corresponding to 190 fb−1 , are τB0 = 1.499 +/- 0.013 +/- 0.008 ps, Δmd = 0.516 +/- 0.008 +/- 0.005Þ ps−1 , where the first uncertainties are statistical and the second are systematic. These results are consistent with the world-average values.

Abudinén, F., Adachi, I., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., et al. (2023). Measurement of the B0 lifetime and flavor-oscillation frequency using hadronic decays reconstructed in 2019–2021 Belle II data. PHYSICAL REVIEW D, 107(9) [10.1103/PhysRevD.107.L091102].

Measurement of the B0 lifetime and flavor-oscillation frequency using hadronic decays reconstructed in 2019–2021 Belle II data

Bernieri, E.
Membro del Collaboration Group
;
Budano, A.
Membro del Collaboration Group
;
Bussino, S.
Membro del Collaboration Group
;
De Pietro, G.
Membro del Collaboration Group
;
Laurenza, M.
Membro del Collaboration Group
;
Martellini, C.
Membro del Collaboration Group
;
2023-01-01

Abstract

We measure the B0 lifetime and flavor-oscillation frequency using B0 → Dð Þ− π þ decays collected by the Belle II experiment in asymmetric-energy eþ e− collisions produced by the SuperKEKB collider operating at the ϒð4SÞ resonance. We fit the decay-time distribution of signal decays, where the initial flavor is determined by identifying the flavor of the other B meson in the event. The results, based on 33000 signal decays reconstructed in a data sample corresponding to 190 fb−1 , are τB0 = 1.499 +/- 0.013 +/- 0.008 ps, Δmd = 0.516 +/- 0.008 +/- 0.005Þ ps−1 , where the first uncertainties are statistical and the second are systematic. These results are consistent with the world-average values.
2023
Abudinén, F., Adachi, I., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., et al. (2023). Measurement of the B0 lifetime and flavor-oscillation frequency using hadronic decays reconstructed in 2019–2021 Belle II data. PHYSICAL REVIEW D, 107(9) [10.1103/PhysRevD.107.L091102].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/438921
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