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Evidence for the decay $$B^0to pbar{p}pi^0$$

$$B^0to pbar{p}pi^0$$崩壊の証拠

Pal, B.*; 谷田 聖; Belle Collaboration*; 他173名*

Pal, B.*; Tanida, Kiyoshi; Belle Collaboration*; 173 of others*

We report a search for the charmless baryonic decay $$B^0to pbar{p}pi^0$$ with a data sample corresponding to an integrated luminosity of 711~$$rm fb^{-1}$$ containing $$(772pm 10)times 10^6$$ $$B^0bar{B}^0$$ pairs. The data was collected by the Belle experiment running on the $$Upsilon(4S)$$ resonance at the KEKB $$e^+e^-$$ collider. We measure a branching fraction $$mathcal{B}(B^0to pbar{p}pi^0)= (5.0pm1.8pm0.6 )times 10^{-7}$$, 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 $$B^{0}toDelta^+bar{p}$$ and $$B^0tobar{Delta}^-p$$, and set an upper limit on the branching fraction: $$mathcal{B}(B^0to Delta^+bar{p})+mathcal{B}(B^0tobar{Delta}^-p) < 1.6times10^{-6}$$ at 90% confidence level.

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パーセンタイル:100

分野:Astronomy & Astrophysics

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