|Title:||Evidence for the decay B0 →p p π0 EVIDENCE for the DECAY ⋯ PAL et al||Authors:||Korpar, S.
Fast, J. E.
Fulsom, B. G.
Lee, S. C.
Jacobs, W. W.
Di Carlo, S.
Dong, T. V.
Li, L. K.
Asner, D. M.
|Issue Date:||1-May-2019||Journal Volume:||99||Journal Issue:||9||Source:||Physical Review D||Abstract:||
© 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. We report a search for the charmless baryonic decay B0→ppπ0 with a data sample corresponding to an integrated luminosity of 711 fb-1 containing (772±10)×106 BB pairs. The data were collected by the Belle experiment running on the (4S) resonance at the KEKB e+e- collider. We measure a branching fraction B(B0→ppπ0)=(5.0±1.8±0.6)×10-7, where the first uncertainty is statistical and the second is systematic. The signal has a significance of 3.1 standard deviations and constitutes the first evidence for this decay mode. We also search for the intermediate two-body decays B0→Δ+p and B0→Δ-p, and set an upper limit on the branching fraction, B(B0→Δ+p)+B(B0→Δ-p)<1.6×10-6 at 90% confidence level.
|Appears in Collections:||物理學系|
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