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Chu, K.*; 谷田聖; Belle Collaboration*; 他176名*

Physical Review D, 101(5), p.052012_1 - 052012_8, 2020/03

https://doi.org/10.1103/PhysRevD.101.052012

被引用回数：2 パーセンタイル：11.40(Astronomy & Astrophysics)

Using a data sample of BB pairs collected on the resonance with the Belle detector at the KEKB asymmetric-energy collider, we report the observations of $B^0to p{bar p}pi^+pi^-$ and $B^+ to p{bar p}pi^+pi^0$ . We measure a decay branching fraction of in $B^0to p{bar{p}}pi^+pi^-$ for $M_{pi^+pi^-} < 1.22 GeV/c^2$ with a significance of 5.5 standard deviations. The contribution from $B0 to p{bar p}K^0$ is excluded. We measure a decay branching fraction of for $B^+ to p{bar p}pi^+pi^0$ with $M_{pi^+pi^0} < 1.3 GeV/c^2$ with a significance of 5.4 standard deviations. We study the difference of the $M_{p{bar p}}$ distributions in $B^0to p{bar p}pi^+pi^-$ and $B^+ to p{bar p}pi^+pi^0$ .