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Title: Charmonium at CLEO

Abstract

At CLEO, charmonium spectroscopy is pursued both thorugh e+e- annihilation data taken in the Upsilon region and more recently at {psi}(2S). A nmber of first observations ({eta}{sub c}{sup '}, hc, {pi} and K form factors) have been made, and numerous high precision measurements have been made in radiative and hadronic decays of charmonium resonances. A brief report of these contributions is presented.

Authors:
 [1]
  1. Department of Physics and Astronomy, Northwestern University, Evanston, IL, 60208 (United States)
Publication Date:
OSTI Identifier:
20798135
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 814; Journal Issue: 1; Conference: 11. international conference on hadron spectroscopy, Rio de Janeiro (Brazil), 21-26 Aug 2005; Other Information: DOI: 10.1063/1.2176544; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CESR STORAGE RING; ELECTROMAGNETIC FORM FACTORS; ETA C-2980 MESONS; ETA MESONS; HADRONIC PARTICLE DECAY; KAONS; MESON SPECTROSCOPY; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; PIONS; PSI-3770 MESONS; RESONANCE PARTICLES

Citation Formats

Seth, Kamal K. Charmonium at CLEO. United States: N. p., 2006. Web. doi:10.1063/1.2176544.
Seth, Kamal K. Charmonium at CLEO. United States. doi:10.1063/1.2176544.
Seth, Kamal K. Sat . "Charmonium at CLEO". United States. doi:10.1063/1.2176544.
@article{osti_20798135,
title = {Charmonium at CLEO},
author = {Seth, Kamal K.},
abstractNote = {At CLEO, charmonium spectroscopy is pursued both thorugh e+e- annihilation data taken in the Upsilon region and more recently at {psi}(2S). A nmber of first observations ({eta}{sub c}{sup '}, hc, {pi} and K form factors) have been made, and numerous high precision measurements have been made in radiative and hadronic decays of charmonium resonances. A brief report of these contributions is presented.},
doi = {10.1063/1.2176544},
journal = {AIP Conference Proceedings},
number = 1,
volume = 814,
place = {United States},
year = {Sat Feb 11 00:00:00 EST 2006},
month = {Sat Feb 11 00:00:00 EST 2006}
}
  • The recent measurements by CLEO for the inclusive J/{psi} and {psi}(2S) production in {upsilon}(1S) decay and our previous calculation are analyzed. The J/{psi} momentum spectrum and the production ratio of {psi}(2S) versus J/{psi} favor {upsilon}{yields}J/{psi}({psi}(2S))+ccg as the dominant contribution. We point out that the differences between the experimental data and our previous results are mainly originated from the setting of the parameter charm quark mass. Encouraged by this result, we investigate the associate strange particle enhancement as a probe for the open charm particles in {upsilon}{yields}J/{psi}({psi}(2S))+ccg.
  • At CLEO, the charmonium singlet states {eta}c(21S0) and hc(11P1) have been firmly identified and a long standing discrepancy for {gamma}{gamma}{gamma}({chi}c2 has been resolved.
  • The recent results on charmonium spectroscopy from BES and CLEO experiments are presented. Their physics implications are discussed.
  • We show that color transparency produces either strong nuclear shadowing or antishadowing, depending on the specific (semi)exclusive photoproduction reaction off nuclei. Neither coherent nor quasielastic diffractive photoproduction of charmonium on nuclei measures the charmonium-nucleon total cross section and the vector-dominance-model interpretation of nuclear photoproduction data cannot be applied. We relate the {ital A} dependence of the coherent and quasielastic photoproduction cross sections and derive the energy dependence of shadowing. The results are in good agreement with the New Muon Collaboration data.
  • In this report leading twist distribution amplitudes of 1S and 2S charmonium mesons are considered. The models of these distribution amplitudes are built and applied to the calculation of double charmonium production at B-factories. The results of the calculation are in good agreement with the experimental measurements.