Photon distribution amplitudes in nonlocal chiral quark model

Journal Article · Mon Feb 01 04:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.034019· OSTI ID:21409174

Kotko, Piotr; Praszalowicz, Michal ^[1]

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1. Marian Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Krakow (Poland)

Photon distribution amplitudes up to twist four are calculated within the nonlocal chiral quark model with a simple pole ansatz for momentum dependence of the constituent quark mass. Calculations are performed using a modified electromagnetic vector current in order to satisfy Ward identities. Quark condensate and magnetic susceptibility of the QCD vacuum entering definitions of the distribution amplitudes are computed and compared with existing phenomenological estimates. Both real and off-shell photons are considered and relevant form factors are calculated. Our results are analytical up to the numerical solution of certain algebraic equations.

• OSTI ID: 21409174
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGEBRAIC CURRENTS
AMPLITUDES
BOSONS
CHIRALITY
COMPOSITE MODELS
CURRENTS
DIMENSIONLESS NUMBERS
DISTRIBUTION
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FIELD THEORIES
FORM FACTORS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MASS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATHEMATICAL SOLUTIONS
NUMERICAL SOLUTION
PARTICLE MODELS
PARTICLE PROPERTIES
PHOTONS
PHYSICAL PROPERTIES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK CONDENSATION
QUARK MODEL
QUARKS
VECTOR CURRENTS
WARD IDENTITY