1/{ital M} corrections to baryonic form factors in the quark model

Journal Article · Thu Feb 01 04:00:00 EST 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.53.1457· OSTI ID:278577

Cheng, H; Tseng, B ^[1]

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1. Institute of Physics, Academia Sinica, Taipei, Taiwan 11529, Republic of (China)

Weak current-induced baryonic form factors at zero recoil are evaluated in the rest frame of the heavy parent baryon using the nonrelativistic quark model. Contrary to previous similar work in the literature, our quark model results do satisfy the constraints imposed by heavy quark symmetry for heavy-heavy baryon transitions at the symmetric point {ital v}{center_dot}{ital v}{prime}=1 and are in agreement with the predictions of the heavy quark effective theory for antitriplet-antitriplet heavy baryon form factors at zero recoil evaluated to order 1/{ital m}{sub {ital Q}}. Furthermore, the quark model approach has the merit that it is applicable to any heavy-heavy and heavy-light baryonic transitions at maximum {ital q}{sup 2}. Assuming a dipole {ital q}{sup 2} behavior, we have applied the quark model form factors to nonleptonic, semileptonic, and weak radiative decays of the heavy baryons. It is emphasized that the flavor suppression factor occurring in many heavy-light baryonic transitions, which is unfortunately overlooked in most literature, is very crucial towards an agreement between theory and experiment for the semileptonic decay {Lambda}{sub {ital c}}{r_arrow}{Lambda}{ital e}{sup +}{nu}{sub {ital e}}. Predictions for the decay modes {Lambda}{sub {ital b}}{r_arrow}{ital J}/{psi}{Lambda}, {Lambda}{sub {ital c}}{r_arrow}{ital p}{phi}, {Lambda}{sub {ital b}}{r_arrow}{Lambda}{gamma}, {Xi}{sub {ital b}}{r_arrow}{Xi}{gamma}, and for the semileptonic decays of {Lambda}{sub {ital b}}, {Xi}{sub {ital b}}{sub ,}{ital c}, and {Omega}{sub {ital b}} are presented. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 278577
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 3 Vol. 53; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BARYONS
CORRECTIONS
FORM FACTORS
QUARK MODEL
RADIATIVE DECAY
SEMILEPTONIC DECAY