Chiral loop contribution to [ital D][r arrow][ital K][sup *][ital l][nu]
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455 (United States)
Light vector mesons are included in the heavy meson chiral Lagrangian in the leading order in momentum expansion. Tree-level form factors in [ital D][sup +][r arrow][ital [bar K]] [sup 0*][ital e+][nu][sub [ital e]] are found at the order of [ital O]([ital k][sup 1]), and the coefficients of 1/[ital m][sub [ital Q]] terms are fixed by requiring reparametrization invariance of the heavy meson chiral Lagrangian and the weak current. Then, chiral loop contributions [[ital O]([ital k][sup 2])] to [ital D][r arrow][ital K][sup *][ital l][nu] are considered. The imaginary part of the [ital K][pi] loop contribution is finite and therefore unambiguously calculable, leading to the lower bounds on the form factors and the partial decay rate in [ital D][sup +][r arrow][ital [bar K]] [sup 0*][ital e+][nu][sub [ital e]]. Under a reasonable assumption, one finds [ital g][sup 2][lt]0.5 is preferred where [ital g] is the [ital D] *Di coupling.
- DOE Contract Number:
- AC02-83ER40105
- OSTI ID:
- 6819652
- Journal Information:
- Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 47:5; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
CHARM PARTICLES
CHARMED MESONS
CHIRAL SYMMETRY
D MESONS
DECAY
ELEMENTARY PARTICLES
FIELD THEORIES
HADRONS
K -892 MESONS
LAGRANGIAN FIELD THEORY
LIE GROUPS
LIMITING VALUES
MATRIX ELEMENTS
MESONS
PARAMETRIC ANALYSIS
PARTICLE DECAY
PERTURBATION THEORY
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
SEMILEPTONIC DECAY
STRANGE MESONS
STRANGE PARTICLES
SU GROUPS
SU-3 GROUPS
SYMMETRY
SYMMETRY GROUPS
VECTOR MESONS
WEAK PARTICLE DECAY