Heavy to light baryon transition form factors

Journal Article · Wed May 01 04:00:00 EDT 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.53.4946· OSTI ID:284058

Guo, X ^[1]; Huang, T ^[2]; Li, Z ^[3]

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1. Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brasil
2. CCAST (World Laboratory) P.O. Box 8730, Beijing 100080, People`s Republic of (China)
3. Institute of High Energy Physics, Academia Sinica, Beijing 100039, People`s Republic of (China)

Recently, Stech found form factor relations for heavy to light transitions based on two simple dynamical assumptions for a spectator particle. In this paper we generalize his approach to the case of baryons and find that for {Lambda}{sub {ital Q}}{r_arrow}{Lambda} ({ital Q}={ital b} or {ital c}) only one independent form factor remains in the limit {ital m}{sub {ital Q}}{r_arrow}{infinity}. Furthermore, combining with the model of Guo and Kroll we determine both of the two form factors for {Lambda}{sub {ital Q}}{r_arrow}{Lambda} in the heavy quark limit. The results are applied to {Lambda}{sub {ital b}}{r_arrow}{Lambda}+{ital J}/{psi} which is not clarified both theoretically and experimentally. It is found that the branching ratio of {Lambda}{sub {ital b}}{r_arrow}{Lambda}+{ital J}/{psi} is of order 10{sup {minus}5}. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 284058
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 9 Vol. 53; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BARYONS
BRANCHING RATIO
FORM FACTORS
QUANTUM CHROMODYNAMICS
QUARKS
TRANSFORMATIONS