Evidence for B0 →p ς ¯ 0π- at Belle

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2023-09-01, 2023-09-22

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American Physical Society

Abstract

We search for the B0→pς¯0π- decay with ς¯0→Λ¯γ, where the γ is not measured, using a data sample corresponding to an integrated luminosity of 711 fb-1 which contains 772×106 BB¯ pairs, collected around the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure for the first time the B0→pς¯0π- branching fraction to be B(B0→pς¯0π-)=(1.17-0.40+0.43(stat)±0.07(syst))×10-6 with a significance of 3.0σ. We simultaneously measure the branching fraction for the related channel B0→pΛ¯π- with much improved precision.

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Keywords

5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 4902 Mathematical Physics, 49 Mathematical Sciences, 51 Physical Sciences

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