Exclusive decays of heavy and light mesons

Journal Article · Thu Aug 01 04:00:00 EDT 1991 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.44.741· OSTI ID:5369058

O'Donnell, P J; Tung, H K.K. ^[1]

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1. Department of Physics, University of Toronto, 60 St. George Street, Toronto, Canada M5S 1A7 (CA)

In the exclusive decay of the {ital B} meson into a {ital K}{sup *} and a photon, the large recoil momentum creates a difficulty in making a connection between the quark level calculations and the meson states. In the quark model, depending on how the recoil momentum is handled, this can lead to differences of a factor of about 5 in the branching ratio. In order to explore this problem, we look at some other meson processes where there exist some experimental data. For the {pi} form factor we show that, by imposing current conservation together with relativistic meson and spinor normalizations within the quark model, it is possible to remove a parameter {kappa} which had previously been introduced to obtain agreement with the form-factor data. The data on the decay {omega}{r arrow}{pi}{sup 0}{mu}{sup +}{mu}{sup {minus}} and {omega}{r arrow}{pi}{sup 0}{gamma} also show the importance of retaining relativistic meson and spinor normalizations; however, we do not resolve the recoil problem. For the exclusive decays {ital B}{r arrow}{ital K}{sup *}{gamma} and {ital B}{r arrow}{ital K}{sup *}{ital e+}{ital e{minus}} we show the extent to which the heavy-quark symmetries determine these decays, even in regions of large recoil.

• OSTI ID: 5369058
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 44:3; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645200* -- High Energy Physics-- Particle Interactions & Properties-Theoretical
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
BAG MODEL
BEAUTY PARTICLES
BOSONS
COMPOSITE MODELS
DECAY
ELECTROMAGNETIC FORM FACTORS
ELEMENTARY PARTICLES
EXTENDED PARTICLE MODEL
FORM FACTORS
HADRONS
MATHEMATICAL MODELS
MESONS
PARTICLE DECAY
PARTICLE MODELS
PARTICLE PROPERTIES
PSEUDOSCALAR MESONS
QUARK MODEL
SEMILEPTONIC DECAY
WEAK PARTICLE DECAY