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Title: Revisit the radiative decays of J/{psi} and {psi}{sup '}{yields}{gamma}{eta}{sub c}({gamma}{eta}{sub c}{sup '})

Abstract

With the new measurements of J/{psi} and {psi}{sup '}{yields}{gamma}{eta}{sub c}({gamma}{eta}{sub c}{sup '}) from the CLEO and BES-III collaboration, we reinvestigate the intermediate meson loop (IML) contributions to these radiative decays in association with the quark model M1 transitions in an effective Lagrangian approach. It shows that the ''unquenched'' effects due to the intermediate hadron loops can be better quantified by the new data for J/{psi}{yields}{gamma}{eta}{sub c}. Although the IML contributions are relatively small in J/{psi}{yields}{gamma}{eta}{sub c}, they play a crucial role in {psi}{sup '}{yields}{gamma}{eta}{sub c}({gamma}{eta}{sub c}{sup '}). A prediction for the IML contributions to {psi}(3770){yields}{gamma}{eta}{sub c}({gamma}{eta}{sub c}{sup '}) is made. Such unquenched effects allow us to reach a coherent description of those three radiative transitions, and gain some insights into the underlying dynamics.

Authors:
 [1];  [2];  [3]
  1. Department of Physics, Qufu Normal University, Qufu, 273165 (China)
  2. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China)
  3. (China)
Publication Date:
OSTI Identifier:
21607763
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 84; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.84.074005; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CESR STORAGE RING; ETA MESONS; GAMMA RADIATION; J PSI-3097 MESONS; LAGRANGIAN FUNCTION; M1-TRANSITIONS; MESONS; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; PSI-3770 MESONS; QUARK MODEL; RADIATIVE DECAY; BOSONS; CHARMONIUM; COMPOSITE MODELS; DECAY; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ENERGY-LEVEL TRANSITIONS; FUNCTIONS; HADRONS; IONIZING RADIATIONS; MATHEMATICAL MODELS; MEASURING INSTRUMENTS; MULTIPOLE TRANSITIONS; PARTICLE DECAY; PARTICLE MODELS; PSEUDOSCALAR MESONS; QUARKONIUM; RADIATIONS; SPECTROMETERS; STORAGE RINGS; VECTOR MESONS

Citation Formats

Li Gang, Zhao Qiang, and Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049. Revisit the radiative decays of J/{psi} and {psi}{sup '}{yields}{gamma}{eta}{sub c}({gamma}{eta}{sub c}{sup '}). United States: N. p., 2011. Web. doi:10.1103/PHYSREVD.84.074005.
Li Gang, Zhao Qiang, & Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049. Revisit the radiative decays of J/{psi} and {psi}{sup '}{yields}{gamma}{eta}{sub c}({gamma}{eta}{sub c}{sup '}). United States. doi:10.1103/PHYSREVD.84.074005.
Li Gang, Zhao Qiang, and Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049. Sat . "Revisit the radiative decays of J/{psi} and {psi}{sup '}{yields}{gamma}{eta}{sub c}({gamma}{eta}{sub c}{sup '})". United States. doi:10.1103/PHYSREVD.84.074005.
@article{osti_21607763,
title = {Revisit the radiative decays of J/{psi} and {psi}{sup '}{yields}{gamma}{eta}{sub c}({gamma}{eta}{sub c}{sup '})},
author = {Li Gang and Zhao Qiang and Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049},
abstractNote = {With the new measurements of J/{psi} and {psi}{sup '}{yields}{gamma}{eta}{sub c}({gamma}{eta}{sub c}{sup '}) from the CLEO and BES-III collaboration, we reinvestigate the intermediate meson loop (IML) contributions to these radiative decays in association with the quark model M1 transitions in an effective Lagrangian approach. It shows that the ''unquenched'' effects due to the intermediate hadron loops can be better quantified by the new data for J/{psi}{yields}{gamma}{eta}{sub c}. Although the IML contributions are relatively small in J/{psi}{yields}{gamma}{eta}{sub c}, they play a crucial role in {psi}{sup '}{yields}{gamma}{eta}{sub c}({gamma}{eta}{sub c}{sup '}). A prediction for the IML contributions to {psi}(3770){yields}{gamma}{eta}{sub c}({gamma}{eta}{sub c}{sup '}) is made. Such unquenched effects allow us to reach a coherent description of those three radiative transitions, and gain some insights into the underlying dynamics.},
doi = {10.1103/PHYSREVD.84.074005},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 7,
volume = 84,
place = {United States},
year = {2011},
month = {10}
}