Exclusive Baryonic B Decays Circa 2005

Abstract

The status of exclusive two-body and three-body baryonic B decays is reviewed. The threshold enhancement effect in the dibaryon invariant mass and the angular distributions in the dibaryon rest frame are stressed and explained. Weak radiative baryonic B decays mediated by the electromagnetic penguin process $b\to s\gamma$ are discussed. Puzzles with the correlation observed in $B^{-}\to p\bar{p}{K}^{-}$ decay and the unexpectedly large rate observed for $B\to {\Lambda }_c{\bar{\Lambda }}_{c}K$ are examined. The former may indicate that the $p\bar{p}$ system is produced through some intermediate states, while the latter implies the failure of naive factorization for $\Lambda \bar{\Lambda }K$ modes and may hint at the importance of final-state rescattering effects.

21 pages, 9 figures, talk presented at 3rd International Conference on Flavor Physics, Oct 3-8, 2005, National Central Univ. Chung-li, Taiwan

References in corpus (51)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Observation of a New Narrow Charmonium State in Exclusive B+-->K+ pi+pi- J/psi Decays
• Observation of a narrow charmonium-like state in exclusive B+ -> K+ pi+pi- J/psi decays
• Observation of a Broad Structure in the ${\pi }^{+}{\pi }^{-}J/\psi$ Mass Spectrum around 4.26 GeV/$c^2$
• Observation of the Narrow State $X(3872)\to J/\psi {\pi }^{+}{\pi }^{-}$ in $\bar{p}p$ Collisions at $\sqrt{s}=1.96 \TeV$
• Observation and Properties of the X(3872) Decaying to J/psi pi+ pi- in p-p(bar) Collisions at sqrt(s) = 1.96 TeV
• Study of the B- --> J/psi K- pi+ pi- Decay and Measurement of the B- --> X(3872) K- Branching Fraction
• Observation of a near-threshold enhancement in th p pbar mass spectrum from radiative J/psi-->gamma p pbar decays
• Observation of a resonance X(1835) in J/ψ--> γπ^+ π^- η^{\prime}
• Observation of $B^{\pm }\to p\bar{p}{K}^{\pm }$
• Cabibbo-allowed nonleptonic weak decays of charmed baryons
• Pathways to Rare Baryonic B Decays
• Observation of B0bar --> D(*)0 p pbar
• Measurements of Charmless Hadronic Two-Body B Meson Decays and the Ratio cal B(B--> DK)/ cal B(B--> Dπ)
• Low-Mass Baryon-Antibaryon Enhancements in B Decays
• Charmless Exclusive Baryonic B Decays
• Observation of B+ -> p pbar pi+, B0 -> p pbar K0, and B+ -> p pbar K*+
• Charmless Three-Body Baryonic B Decays
• 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-
• Observation of a threshold enhancement in the p \bar{Lambda} invariant mass spectrum
• Λ_b \to ΛJ/ψdecay in perturbative QCD
• Three-body Baryonic anti-B -->Lambda anti-p pi Decays and Such
• Observation of B0bar->Lambda_c+pbar decay
• Understanding $B\to D^{\ast -}N\bar{N}$ and Its Implications
• Hadronization of $b\to c\bar{c}s$
• First Observation of the Decays $B^0\to D^{\ast -}p\bar{p}{\pi }^{+}$ and B^{0}\to D^{*-}p\bar{n}$
• Possible Hints and Search for Glueball Production in Charmless Rare B Decays
• Charmful Baryonic B Decays ${\bar{B}}^0\to {\Lambda }_c\bar{p}$ and $\bar{B}\to {\Lambda }_c\bar{p}\pi (\rho )$
• Measurement of Exclusive B Decays to Final States Containing a Charmed Baryon
• Search for the Decay B0 -> ppbar
• Observation of B- -> J/psi Lambda pbar and searches for B- -> J/psi Sigma0 pbar and B0 -> J/psi p pbar Decays
• Study of Exclusive B decays to Charmed Baryons
• Prediction of Three-body $B^0\to {\rho }^{-}p\bar{n},{\pi }^{-}p\bar{n}$ Decay Rates
• Three-Body Charmful Baryonic B Decays $\bar{B}\to D(D^{\ast })N\bar{N}$
• Heavy Baryon Production and Decay
• Study of $B\to \Lambda \bar{\Lambda }K$ and $B\to \Lambda \bar{\Lambda }\pi$
• Radiative Baryonic $B$ Decays
• Penguin-Induced Radiative Baryonic B Decays
• Hadronic B Decays to Charmed Baryons
• Search for Exclusive Rare Baryonic Decays of $B$ Mesons
• Doubly Charmful Baryonic B Decays
• Evidence for B+ --> Jpsi p Lambda-bar and Search for B0 --> Jpsi p p-bar
• B meson decays to baryons in the diquark model
• Search for $B^0\to p\bar{p}$, $\Lambda \bar{\Lambda }$ and $B^{+}\to p\bar{\Lambda }$ at Belle
• Charmless Two-body Baryonic B Decays
• Penguin-induced Radiative Baryonic B Decays Revisited
• Final-State Phases in $B\to$ Baryon-Antibaryon Decays
• Production of doubly charmed baryons in B decays
• Baryon helicity in B decay

Cited by in corpus (24)

• The Physics of the B Factories
• Study of the decay mechanism for B+ to p pbar K+ and B+ to p pbar pi+
• Collider Signals of Baryogenesis and Dark Matter from $B$ Mesons: A Roadmap to Discovery
• Partial waves of baryon-antibaryon in three-body B meson decay
• Charmful Three-body Baryonic B decays
• Charmless Hadronic B-Meson Decays
• Angular distributions in three-body baryonic B decays
• Charmless Two-body Baryonic $B_{u,d,s}$ Decays Revisited
• B(d,s)-anti-B(d,s) mixing and Lepton Flavour Violation in SUSY GUTs: impact of the first measurements of phi(s)
• Studies of the decays $B^{+}\to p\bar{p}{h}^{+}$ and observation of $B^{+}\to \bar{\Lambda }(1520)p$
• The semileptonic baryonic decay $D_s^{+}\to p\bar{p}{e}^{+}{\nu }_e$
• Study of $B\to p\bar{p}{K}^{\ast }$ and $B\to p\bar{p}\rho$
• Calculation of BR(${\bar{B}}^0\to {\Lambda }_c^{+}+\bar{p})$ in the PQCD Approach
• Baryonic D Decay $D_s^{+}\to p\bar{n}$ and Its Implication
• On the smallness of Tree-dominated Charmless Two-body Baryonic $B$ Decay Rates
• Rates and $CP$ asymmetries of Charmless Two-body Baryonic $B_{u,d,s}$ Decays
• Determination of Nucleon Form factors from Baryonic B Decays
• Baryonic $B$ meson decays
• Charmful baryonic B\to {\bf B\bar B'}M_c decays
• Higher twist corrections to doubly-charmed baryonic $B$ decays
• Evidence for the decay $B^0\to p\bar{p}{\pi }^0$
• Observation of the decays $B^{+}\to {\Sigma }_c(2455{)}^{++}{\overline{\Xi }}_c^{-}$ and $B^0\to {\Sigma }_c(2455{)}^0{\overline{\Xi }}_c^0$
• Phenomenological Analysis of the Decay $B^{\pm}\to K^{\pm} p {\bar p}
• Hadronic rescattering to solve helicity puzzle in $B^{+}\to p\bar{p}{\pi }^{+}(K^{+})$ decays