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Leading-twist pion and kaon distribution amplitudes from the QCD instanton vacuum

Seung-il Nam1,*, Hyun-Chul Kim1,†, Atsushi Hosaka2,‡, and M. M. Musakhanov3,§

  • 1Department of Physics and Nuclear physics & Radiation Technology Institute (NuRI), Pusan National University, Busan 609-735, Korea
  • 2Research Center for Nuclear Physics (RCNP), Ibaraki, Osaka 567-0047, Japan
  • 3Theoretical Physics Department, National University of Uzbekistan, Tashkent 7000174, Uzbekistan

  • *Electronic address: sinam@pusan.ac.kr
  • †Electronic address: hchkim@pusan.ac.kr
  • ‡Electronic address: hosaka@rcnp.osaka-u.ac.jp
  • §Electronic address: musakhanov@pusan.ac.kr
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Phys. Rev. D 74, 014019 – Published 24 July, 2006

DOI: https://doi.org/10.1103/PhysRevD.74.014019

Abstract

We investigate the leading-twist light-cone distribution amplitudes for the pion and kaon, based on the nonlocal chiral quark model from the instanton vacuum. Effects of explicit flavor SU(3)-symmetry breaking are taken into account. The Gegenbauer moments are computed, analyzed and compared with those of other models. The one-loop QCD evolution of the moments is briefly discussed. The transverse momentum distributions are also discussed for the pion and kaon light-cone wave functions.

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Phys. Rev. D 74, 014019– Published 24 July, 2006
  • Received 24 May 2006

© 2006 American Physical Society

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