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Title: Distribution amplitudes and decay constants for ({pi},K,{rho},K*) mesons in the light-front quark model

Abstract

We present a calculation of the quark distribution amplitudes (DAs), the Gegenbauer moments, and decay constants for {pi}, {rho}, K, and K* mesons using the light-front quark model. While the quark DA for {pi} is somewhat broader than the asymptotic one, that for {rho} meson is very close to the asymptotic one. The quark DAs for K and K* show asymmetric form due to the flavor SU(3)-symmetry breaking effect. The decay constants for the transversely polarized {rho} and K* mesons (f{sub {rho}}{sup T} and f{sub K*}{sup T}) as well as the longitudinally polarized ones (f{sub {rho}} and f{sub K*}) are also obtained. Our averaged values for f{sub V}{sup T}/f{sub V}, i.e. (f{sub {rho}}{sup T}/f{sub {rho}}){sub av}=0.78 and (f{sub K*}{sup T}/f{sub K*}){sub av}=0.84, are found to be consistent with other model predictions. Especially, our results for the decay constants are in good agreement with the SU(6) symmetry relation, f{sub {rho}}{sub (K*)}{sup T}=(f{sub {pi}}{sub (K)}+f{sub {rho}}{sub (K*)})/2.

Authors:
 [1];  [2]
  1. Department of Physics, Teachers College, Kyungpook National University, Daegu, 702-701 (Korea, Republic of)
  2. Department of Physics, North Carolina State University, Raleigh, North Carolina 27695-8202 (United States)
Publication Date:
OSTI Identifier:
21010995
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevD.75.034019; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; DECAY AMPLITUDES; DISTRIBUTION; FLAVOR MODEL; K*-892 MESONS; KAONS; PIONS; POLARIZATION; QUARK MODEL; QUARKS; RHO-770 MESONS; SU-3 GROUPS; SU-6 GROUPS; SYMMETRY BREAKING

Citation Formats

Choi, Ho-Meoyng, and Ji, Chueng-Ryong. Distribution amplitudes and decay constants for ({pi},K,{rho},K*) mesons in the light-front quark model. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.034019.
Choi, Ho-Meoyng, & Ji, Chueng-Ryong. Distribution amplitudes and decay constants for ({pi},K,{rho},K*) mesons in the light-front quark model. United States. doi:10.1103/PHYSREVD.75.034019.
Choi, Ho-Meoyng, and Ji, Chueng-Ryong. Thu . "Distribution amplitudes and decay constants for ({pi},K,{rho},K*) mesons in the light-front quark model". United States. doi:10.1103/PHYSREVD.75.034019.
@article{osti_21010995,
title = {Distribution amplitudes and decay constants for ({pi},K,{rho},K*) mesons in the light-front quark model},
author = {Choi, Ho-Meoyng and Ji, Chueng-Ryong},
abstractNote = {We present a calculation of the quark distribution amplitudes (DAs), the Gegenbauer moments, and decay constants for {pi}, {rho}, K, and K* mesons using the light-front quark model. While the quark DA for {pi} is somewhat broader than the asymptotic one, that for {rho} meson is very close to the asymptotic one. The quark DAs for K and K* show asymmetric form due to the flavor SU(3)-symmetry breaking effect. The decay constants for the transversely polarized {rho} and K* mesons (f{sub {rho}}{sup T} and f{sub K*}{sup T}) as well as the longitudinally polarized ones (f{sub {rho}} and f{sub K*}) are also obtained. Our averaged values for f{sub V}{sup T}/f{sub V}, i.e. (f{sub {rho}}{sup T}/f{sub {rho}}){sub av}=0.78 and (f{sub K*}{sup T}/f{sub K*}){sub av}=0.84, are found to be consistent with other model predictions. Especially, our results for the decay constants are in good agreement with the SU(6) symmetry relation, f{sub {rho}}{sub (K*)}{sup T}=(f{sub {pi}}{sub (K)}+f{sub {rho}}{sub (K*)})/2.},
doi = {10.1103/PHYSREVD.75.034019},
journal = {Physical Review. D, Particles Fields},
number = 3,
volume = 75,
place = {United States},
year = {Thu Feb 01 00:00:00 EST 2007},
month = {Thu Feb 01 00:00:00 EST 2007}
}
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