A study of the charmless baryonic decays B0(s) → K0 p anti-p is presented, where B0(s) denotes either a B0 or a B0s meson. The analysis is based on proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb^−1. The decay B0s → K0 p anti-p is observed for the first time, with a measured branching fraction of (9.14 ± 1.69 ± 0.90 ± 0.33 ± 0.20) × 10^−7 and a significance of 5.6σ. The uncertainties respectively account for statistical and systematic contributions, the precision of the branching fraction of the normalisation channel B0 → K0 π+ π− and the fragmentation fraction ratio fs/fd. The branching fraction determined for B0 → K0 p anti-p is (2.82 ± 0.08 ± 0.12 ± 0.10) × 10^−6, which is the most precise measurement to date.

Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A.A., et al. (2025). Observation of the decay B0s → K0 p anti-p and measurement of the B0(s) → K0 p anti-p branching fractions. JOURNAL OF HIGH ENERGY PHYSICS, 2025(7), 0-24 [10.1007/jhep07(2025)121].

Observation of the decay B0s → K0 p anti-p and measurement of the B0(s) → K0 p anti-p branching fractions

Carbone, A.;Ferrari, F.;Galli, D.;Patrignani, C.;Spedicato, E.;Villa, A.;Zenesini, F.;
2025

Abstract

A study of the charmless baryonic decays B0(s) → K0 p anti-p is presented, where B0(s) denotes either a B0 or a B0s meson. The analysis is based on proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb^−1. The decay B0s → K0 p anti-p is observed for the first time, with a measured branching fraction of (9.14 ± 1.69 ± 0.90 ± 0.33 ± 0.20) × 10^−7 and a significance of 5.6σ. The uncertainties respectively account for statistical and systematic contributions, the precision of the branching fraction of the normalisation channel B0 → K0 π+ π− and the fragmentation fraction ratio fs/fd. The branching fraction determined for B0 → K0 p anti-p is (2.82 ± 0.08 ± 0.12 ± 0.10) × 10^−6, which is the most precise measurement to date.
2025
Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A.A., et al. (2025). Observation of the decay B0s → K0 p anti-p and measurement of the B0(s) → K0 p anti-p branching fractions. JOURNAL OF HIGH ENERGY PHYSICS, 2025(7), 0-24 [10.1007/jhep07(2025)121].
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adefisoye, A. A.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Agapopoul...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1035292
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