Corrections to chiral dynamics of heavy hadrons: SU(3) symmetry breaking

Journal Article · Wed Jun 01 04:00:00 EDT 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.49.5857· OSTI ID:7308550

Cheng, H; Cheung, C; Lin, G; Lin, Y C; Yan, T; Yu, H ^[1]

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1. Institute of Physics, Academia Sinica, Taipei, Taiwan 11529 (Taiwan, Province of China) Physics Department, National Central University, Chung-li, Taiwan 32054 (Taiwan, Province of China) Floyd R. Newman Laboratory of Nuclear Studies, Cornell University, Ithaca, New York 14853 (United States) Institute for Theoretical Physics, State University of New York, Stony Brook, New York 11794 (United States)

In previous publications we have analyzed the strong and electromagnetic decays of heavy mesons and heavy baryons in a formalism which incorporates heavy-quark and chiral symmetries. There are two possible symmetry-breaking effects on the chiral dynamics of heavy hadrons: the finite-mass effects from light quarks and the 1/[ital m][sub [ital Q]] corrections from heavy quarks. In the present paper, chiral-symmetry-breaking effects are studied and applications to various strong and radiative decays of heavy hadrons are illustrated. SU(3) violations induced by chiral loops in the radiative decays of charmed mesons and charmed baryons are compared with those predicted by the constituent quark model. In particular, available data for [ital D][sup *] decays favor values of the parameters in chiral perturbation theory which give predictions for [ital D][sup *] decays close to the quark model results except for the [ital D][sub [ital s]][sup *+]. Implications are discussed.

• OSTI ID: 7308550
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 49:11; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662120* -- General Theory of Particles & Fields-- Symmetry
Conservation Laws
Currents & Their Properties-- (1992-)
662240 -- Models for Strong Interactions-- (1992-)
662350 -- Decays of Mesons-- (1992-)
662390 -- Electromagnetic Processes & Properties-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BOSONS
CHARM PARTICLES
CHARMED BARYONS
CHARMED MESONS
CHIRAL SYMMETRY
COMPOSITE MODELS
CORRECTIONS
D S MESONS
DECAY
ELEMENTARY PARTICLES
FERMIONS
HADRONS
LIE GROUPS
MATHEMATICAL MODELS
MESONS
PARTICLE DECAY
PARTICLE MODELS
PERTURBATION THEORY
QUARK MODEL
RADIATIVE DECAY
SU GROUPS
SU-3 GROUPS
SYMMETRY
SYMMETRY BREAKING
SYMMETRY GROUPS