Heavy Baryon Production and Decay

Abstract

The branching ratio B(Lambda_c -> p K- pi+) normalizes the production and decay of charmed and bottom baryons. At present, this crucial branching ratio is extracted dominantly from B.bar -> baryons analyses. This note questions several of the underlying assumptions and predicts sizable B.bar -> D(*) N N'.bar X transitions, which were traditionally neglected. It predicts B(Lambda_c -> p K- pi+) to be significantly larger (0.07 +/- 0.02) than the world average. Some consequences are briefly mentioned. Several techniques to measure B(Lambda_c -> p K- pi+) are outlined with existing or soon available data samples. By equating two recent CLEO results, an appendix obtains B(D0 -> K- pi+)= 0.035 +/- 0.002, which is somewhat smaller than the current world average.

27 pages, 4 eps figures, revtex

References in corpus (5)

• Aspects Of Heavy Quark Theory
• Flavor-Specific Inclusive B Decays to Charm
• First Lattice Study of Semileptonic Decays of Lambda_b and Xi_b Baryons
• The Inclusive Decays $B\to DX$ and $B\to D^{\ast }X$
• Study of Semileptonic Decays of B Mesons to Charmed Baryons

Cited by in corpus (19)

• 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
• Combined nonrelativistic constituent quark model and heavy quark effective theory study of semileptonic decays of Λ_b and Ξ_b baryons
• Collider Signals of Baryogenesis and Dark Matter from $B$ Mesons: A Roadmap to Discovery
• Understanding $B\to D^{\ast -}N\bar{N}$ and Its Implications
• First Observation of the Decays $B^0\to D^{\ast -}p\bar{p}{\pi }^{+}$ and B^{0}\to D^{*-}p\bar{n}$
• Measurements of the Decays $B^0 \to \bar{D}^0\proton\antiproton$, $B^0 \to \bar{D}^{*0}\proton\antiproton$, $B^0 \to D^{-}\proton\antiprotonπ^+$, and $B^0 \to D^{*-}\proton\antiprotonπ^+$
• Charmful Baryonic B Decays ${\bar{B}}^0\to {\Lambda }_c\bar{p}$ and $\bar{B}\to {\Lambda }_c\bar{p}\pi (\rho )$
• Exclusive Baryonic B Decays Circa 2005
• First Measurement of the Ratio of Branching Fractions B(Lambda_b to Lambda_c mu nu)/B(Lambda_b to Lambda_c pi)
• Exotic states of matter in heavy meson decays
• Study of Nondiagonal Parton Distribution Models
• Prospects for improved ${\Lambda }_c$ branching fractions
• Measurement of B(/\c->pKpi)
• A direct evaluation of the Lambda_c^+ absolute branching ratios: a new approach
• Nonstrange baryonia
• Study of the semileptonic decay Λ_b^0 \to Λ_c^+ l^- \barν_l