Sum rules for charmonium and charmed mesons in quantum chromodynamics. [Dispersion relations]

Journal Article · Mon Mar 21 04:00:00 EST 1977 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.38.626· OSTI ID:7325501

Novikov, V A; Okun', L B; Shifman, M A; Vainshtein, A I; Voloshin, M B; Zakharov, V I

We consider the contribution of charmed quarks to vacuum polarization and to ..gamma gamma.. scattering. In quantum chromodynamics the calculation is reliable for small photon momenta provided that the quark mass m/sub c/ is large compared with the scale of the hadronic mass ..mu.., 4m/sub c//sup 2/very-much-greater-than..mu../sup 2/. By the use of dispersion relations, the calculation is converted into a set of sum rules which impose model-independent upper bounds on the charmonium leptonic and photonic decay rates and enables one to estimate the hadronic widths as well. Weak leptonic decays of the charmed mesons are also estimated.

• Research Organization: Institute of Theoretical and Experimental Physics, Moscow, U.S.S.R.
• OSTI ID: 7325501
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 38:12; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
645203 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BASIC INTERACTIONS
BOSONS
CHARM PARTICLES
CHARMONIUM
COMPOSITE MODELS
CORRECTIONS
COUPLING CONSTANTS
DECAY
DISPERSION RELATIONS
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
EQUATIONS
HADRONS
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
LEPTONIC DECAY
LIMITING VALUES
MATHEMATICAL MODELS
MESON RESONANCES
MESONS
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PHOTON-PHOTON INTERACTIONS
POSTULATED PARTICLES
QUARK MODEL
RESONANCE PARTICLES
SUM RULES
VACUUM POLARIZATION
WEAK INTERACTIONS
WEAK PARTICLE DECAY