Leading-twist pion and kaon distribution amplitudes in the gauge-invariant nonlocal chiral quark model from the instanton vacuum

Journal Article · Sun Oct 01 00:00:00 EDT 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.74.076005· OSTI ID:20871342

Nam, Seung-il; Kim, Hyun-Chul ^[1]

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1. Department of Physics and Nuclear Physics and Radiation Technology Institute (NuRI), Pusan National University, Busan 609-735 (Korea, Republic of)

We investigate the leading-twist light-cone distribution amplitudes for the pion and kaon based on the gauge-invariant nonlocal chiral quark model from the instanton vacuum in the presence of external axial-vector currents. We find that the nonlocal contribution from the gauge invariance has much effects on the pion distribution amplitudes, while it changes mildly the kaon ones. We also study the Gegenbauer moments of the distribution amplitudes and compare them with the empirical analysis of the CLEO data.

• OSTI ID: 20871342
• Journal Information: Physical Review. D, Particles Fields, Vol. 74, Issue 7; Other Information: DOI: 10.1103/PhysRevD.74.076005; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
AXIAL-VECTOR CURRENTS
CESR STORAGE RING
CHIRALITY
COMPARATIVE EVALUATIONS
DISTRIBUTION
GAUGE INVARIANCE
KAONS
LIGHT CONE
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PIONS
QUARK MODEL