Study of $B\to p\bar{p}\pi \pi$

Abstract

Using a data sample of $772\times 10^6$ BB pairs collected on the ${\rm Y}(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider, we report the observations of $B^0\to p\bar{p}{\pi }^{+}{\pi }^{-}$ and $B^{+}\to p\bar{p}{\pi }^{+}{\pi }^0$. We measure a decay branching fraction of $(0.83\pm 0.17\pm 0.17)\times 10^{-}6$ in $B^0\to p\bar{p}{\pi }^{+}{\pi }^{-}$ for $M_{{\pi }^{+}{\pi }^{-}}<1.22GeV/c^2$ 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 $(4.58\pm 1.17\pm 0.67)\times 10^{-}6$ for $B^{+}\to p\bar{p}{\pi }^{+}{\pi }^0$ with $M_{{\pi }^{+}{\pi }^0}<1.3GeV/c^2$ with a significance of 5.4 standard deviations. We study the difference of the $M_{p\bar{p}}$ distributions in $B^0\to p\bar{p}{\pi }^{+}{\pi }^{-}$ and $B^{+}\to p\bar{p}{\pi }^{+}{\pi }^0$.

arXiv comment7 pages, 4 figures, submitted to Phys.Rev.D

References in corpus (12)

• Evidence for B0->pi0pi0
• Observation of $B^{\pm }\to p\bar{p}{K}^{\pm }$
• Neutral B Flavor Tagging for the Measurement of Mixing-induced CP Violation at Belle
• Observation of CP Violation in B0 -> K+pi- and B0 -> pi+pi-
• Study of the decay mechanism for B+ to p pbar K+ and B+ to p pbar pi+
• Measurements of Branching Fractions of $\tau$ Lepton Decays with one or more $K_S^0$
• Observation of Direct CP-Violation in B0 --> pi+pi- Decays and Model-Independent Constraints on phi2
• Evidence for CP violation in $B^{+}\to p\bar{p}{K}^{+}$ decays
• Study of $B\to p\bar{p}{K}^{\ast }$ and $B\to p\bar{p}\rho$
• Observation of charmless baryonic decays $B_{(s)}^0\to p\overline{p}{h}^{+}{h}^{\prime -}$
• Evidence for Semileptonic B- to p pbar l nubar Decays
• Evidence for the decay $B^0\to p\bar{p}{\pi }^0$

Cited by in corpus (2)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Measurement of $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }\eta$ from 3.5106 to 4.6988 GeV and study of $\Lambda \bar{\Lambda }$ mass threshold enhancement