Study of the decay mechanism for B+ to p pbar K+ and B+ to p pbar pi+

Abstract

We study the characteristics of the low mass ppbar enhancements near threshold in the three-body decays B+ to p pbar K+ and B+ to p pbar pi+. We observe that the proton polar angle distributions in the ppbar helicity frame in the two decays have the opposite polarity, and measure the forward-backward asymmetries as a function of the ppbar mass for the p pbar K+ mode. We also search for the intermediate two-body decays, B+ to pbar Delta++ and B+ to p Delta0bar, and set upper limits on their branching fractions. These results are obtained from a 414 fb^{-1} data sample that contains 449 times 10^6 BBbar events collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider.

arXiv comment15 pages, 5 figures (14 figure files), revisions to Phys. Lett. B

References in corpus (25)

• A Unified Approach to the Classical Statistical Analysis of Small Signals
• Including Systematic Uncertainties in Confidence Interval Construction for Poisson Statistics
• Observation of $B^{\pm }\to p\bar{p}{K}^{\pm }$
• Pathways to Rare Baryonic B Decays
• Low-Mass Baryon-Antibaryon Enhancements in B Decays
• Charmless Exclusive Baryonic B Decays
• Charmless Three-Body Baryonic B Decays
• Observation of B+ -> p pbar pi+, B0 -> p pbar K0, and B+ -> p pbar K*+
• Study of the Baryon-Antibaryon Low-Mass Enhancements in Charmless Three-body Baryonic B Decays
• Observation of B+ to Lambda Lambdabar K+
• Observation of B0 to p Lambdabar pi-
• Model-independent view on the low-mass proton-antiproton enhancement
• Measurement of the Branching Fraction for B->eta' K and Search for B->eta'pi+
• ppbar enhancement in B and J/Psi decay
• Observation of B0bar->Lambda_c+pbar decay
• Partial waves of baryon-antibaryon in three-body B meson decay
• Study of B+ to p Lambdabar gamma, p Lambdabar pi0 and B0 to p Lambdabar pi-
• Angular distributions in three-body baryonic B decays
• Possible Hints and Search for Glueball Production in Charmless Rare B Decays
• Study of decay mechanisms in B- -> Lambda_c+ pbar pi- decay and observation of low mass structure in the (Lambda_c+ pbar) system
• Exclusive Baryonic B Decays Circa 2005
• Observation of B^+ -> \barΞ_c^0Λ_c^+ and Evidence for B^0 -> \barΞ_c^-Λ_c^+
• Study of J/psi to p pbar, Lambda Lambdabar and observation of eta_c to Lambda Lambdabar at Belle
• Charmless Two-body Baryonic B Decays
• Large Direct CP Violation in B -> phi phi Xs Decays

Cited by in corpus (45)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Measurement of the ${\eta }_c(1S)$ production cross-section in proton-proton collisions via the decay ${\eta }_c(1S)\to p\bar{p}$
• Study of psi(2S) Decays to gamma p bar{p}, pi^0 p bar{p} and eta p bar{p} and Search for p bar{p} Threshold Enhancements
• Paris nucleon-antinucleon potential constrained by recent antiprotonic-atom data and antineutron-proton total cross sections
• On the near-threshold $\bar{p}p$ invariant mass spectrum measured in $J/\psi$ and ${\psi }^{\prime }$ decays
• Charmful Three-body Baryonic B decays
• First observation of a baryonic $B_c^{+}$ decay
• Charmless Hadronic B-Meson Decays
• Measurements of the branching fractions of $B^{+}\to p\bar{p}{K}^{+}$ decays
• Observation of B0 to Lambda Lambdabar K0 and B0 to Lambda Lambdabar K*0 at Belle
• Evidence for CP violation in $B^{+}\to p\bar{p}{K}^{+}$ decays
• Observation of a near-threshold enhancement in the $\Lambda \bar{\Lambda }$ mass spectrum from $e^{+}{e}^{-}\to \varphi \Lambda \bar{\Lambda }$ at $\sqrt{s}$ from 3.51 to 4.60 GeV
• Charmless Two-body Baryonic $B_{u,d,s}$ Decays Revisited
• Studies of the decays $B^{+}\to p\bar{p}{h}^{+}$ and observation of $B^{+}\to \bar{\Lambda }(1520)p$
• Searches for $B_{(s)}^0\to J/\psi p\overline{p}$ and $B^{+}\to J/\psi p\overline{p}{\pi }^{+}$ decays
• Measurement of ${\chi }_{cJ}$ decaying into $p\bar{n}{\pi }^{-}$ and $p\bar{n}{\pi }^{-}{\pi }^0$
• Measurement of direct CP violation parameters in B^+/- -> J/ψK^+/- and B^+/- ->J/psi pi^+/- decays with 10.4 fb^-1 of Tevatron data
• Direct CP and T Violation in Baryonic B Decays
• Near threshold ppbar enhancement in the J/psi -> omega ppbar decay
• Rates and $CP$ asymmetries of Charmless Two-body Baryonic $B_{u,d,s}$ Decays
• Evidence for Semileptonic B- to p pbar l nubar Decays
• Observation of B- to pbar Lambda D0 at Belle
• Factorization and angular distribution asymmetries in charmful baryonic B decays
• Final state hadronic interactions and non-resonant $B^{\pm }\to K^{\pm }{\pi }^{+}{\pi }^{-}$ decays
• Study of $\bar{B}\to \Lambda \bar{p}\rho (\varphi )$ and $\bar{B}\to \Lambda \bar{\Lambda }{\bar{K}}^{\ast }$
• Semileptonic $B-\to p\bar{p}\ell -{\bar{\nu }}_{\ell }$ decays
• Evidence for the baryonic decay B0bar --> D0 Lambda Lambdabar
• Charmful baryonic B\to {\bf B\bar B'}M_c decays
• 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
• Semileptonic baryonic $B$ decays
• Observation of $B^0\to p\bar{\Lambda }{D}^{(\ast )-}$
• Two-body Baryonic $B_{u,d,s}$ and $B_c$ to Charmless Final State Decays
• Observation of $B^{+}\to p\bar{\Lambda }{K}^{+}{K}^{-}$ and $B^{+}\to \bar{p}\Lambda K^{+}{K}^{+}$
• Four-body baryonic $B\to {\mathbf{B}}_1{\bar{\mathbf{B}}}_1^{\prime }{\mathbf{B}}_2{\bar{\mathbf{B}}}_2^{\prime }$ decays
• Angular asymmetries in $B\to \Lambda \bar{p}M$ decays
• Study of $B\to p\bar{p}\pi \pi$
• Coupled-channel analysis of the near-threshold $e^{+}{e}^{-}\to N\bar{N}$ cross sections
• Hadronic rescattering to solve helicity puzzle in $B^{+}\to p\bar{p}{\pi }^{+}(K^{+})$ decays
• Baryons and baryoniums in the perspective of QCD sum rules
• Phenomenological Analysis of the Decay $B^{\pm}\to K^{\pm} p {\bar p}
• Summary of the CKM 2014 working group on rare decays
• Evidence for B_s^0 -> Lambda_c^+ Lambda-bar pi^-
• First search for $B\to X_s\nu \bar{\nu }$ decays