Symmetry-breaking corrections to meson decay constants in the heavy-quark effective theory

Journal Article · Sat Aug 01 04:00:00 EDT 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.46.1076· OSTI ID:7035599

Neubert, M ^[1]

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1. Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States)

Spin- and flavor-symmetry-breaking corrections to decay constants of heavy mesons are analyzed in next-to-leading order in the 1/{ital m}{sub {ital Q}} expansion. The general structure of these corrections is derived in an effective-field-theory approach. The subleading universal form factors, which parametrize the matrix elements of higher-dimensional operators in the effective theory, are estimated using QCD sum rules. The renormalization-group improvement of these low-energy parameters is discussed in detail. As an application, the spin-symmetry-violating effects responsible for the vector-pseudoscalar mass difference and for the ratio of the corresponding decay constants, {ital f}{sub {ital V}}/{ital f}{sub {ital P}}, are calculated.

• OSTI ID: 7035599
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 46:3; ISSN PRVDA; 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-)
662230* -- Quantum Chromodynamics-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
BOSONS
COMPOSITE MODELS
DECAY
DIFFERENTIAL EQUATIONS
ELEMENTARY PARTICLES
EQUATIONS
EQUATIONS OF MOTION
FERMIONS
FIELD THEORIES
FLAVOR MODEL
FORM FACTORS
HADRONS
MASS DIFFERENCE
MATHEMATICAL MODELS
MATRIX ELEMENTS
MESONS
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE DECAY
PARTICLE MODELS
PARTICLE PROPERTIES
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
QUARKS
SPIN
SUM RULES
SYMMETRY BREAKING
VECTOR MESONS