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Title: {chi}{sub c0} and {chi}{sub c2} decays into {eta}{eta}, {eta}{eta}{sup '}, and {eta}{sup '}{eta}{sup '} final states

Abstract

Using a sample of 3x10{sup 6} {psi}(2S) decays collected by the CLEO III and CLEO-c detector configurations, we present results of a study of {chi}{sub c0} and {chi}{sub c2} decays into {eta}{eta}, {eta}{eta}{sup '}, and {eta}{sup '}{eta}{sup '} final states. We find B({chi}{sub c0}{yields}{eta}{eta})=(0.31{+-}0.05{+-}0.04{+-}0.02)%, B({chi}{sub c0}{yields}{eta}{eta}{sup '})<0.05% at the 90% confidence level, and B({chi}{sub c0}{yields}{eta}{sup '}{eta}{sup '})=(0.17{+-}0.04{+-}0.02{+-}0.01)%. We also present upper limits for the decays of {chi}{sub c2} into these final states. These results give information on the decay mechanism of {chi}{sub c} states into pseudoscalars.

Authors:
; ; ; ;  [1]; ; ; ; ; ;  [2]; ;  [3]; ; ; ; ; ; ;  [4]
  1. Rensselaer Polytechnic Institute, Troy, New York 12180 (United States)
  2. University of Rochester, Rochester, New York 14627 (United States)
  3. Southern Methodist University, Dallas, Texas 75275 (United States)
  4. Syracuse University, Syracuse, New York 13244 (United States) (and others)
Publication Date:
OSTI Identifier:
21020231
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.75.071101; (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; BRANCHING RATIO; CESR STORAGE RING; CHI0-3415 MESONS; CHI2-3555 MESONS; ETA MESONS; ETA PRIME-958 MESONS; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; PSI-3770 MESONS; STANDARD MODEL

Citation Formats

Adams, G. S., Anderson, M., Cummings, J. P., Danko, I., Napolitano, J., He, Q., Insler, J., Muramatsu, H., Park, C. S., Thorndike, E. H., Yang, F., Coan, T. E., Gao, Y. S., Artuso, M., Blusk, S., Butt, J., Li, J., Menaa, N., Mountain, R., and Nisar, S. {chi}{sub c0} and {chi}{sub c2} decays into {eta}{eta}, {eta}{eta}{sup '}, and {eta}{sup '}{eta}{sup '} final states. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.071101.
Adams, G. S., Anderson, M., Cummings, J. P., Danko, I., Napolitano, J., He, Q., Insler, J., Muramatsu, H., Park, C. S., Thorndike, E. H., Yang, F., Coan, T. E., Gao, Y. S., Artuso, M., Blusk, S., Butt, J., Li, J., Menaa, N., Mountain, R., & Nisar, S. {chi}{sub c0} and {chi}{sub c2} decays into {eta}{eta}, {eta}{eta}{sup '}, and {eta}{sup '}{eta}{sup '} final states. United States. doi:10.1103/PHYSREVD.75.071101.
Adams, G. S., Anderson, M., Cummings, J. P., Danko, I., Napolitano, J., He, Q., Insler, J., Muramatsu, H., Park, C. S., Thorndike, E. H., Yang, F., Coan, T. E., Gao, Y. S., Artuso, M., Blusk, S., Butt, J., Li, J., Menaa, N., Mountain, R., and Nisar, S. Sun . "{chi}{sub c0} and {chi}{sub c2} decays into {eta}{eta}, {eta}{eta}{sup '}, and {eta}{sup '}{eta}{sup '} final states". United States. doi:10.1103/PHYSREVD.75.071101.
@article{osti_21020231,
title = {{chi}{sub c0} and {chi}{sub c2} decays into {eta}{eta}, {eta}{eta}{sup '}, and {eta}{sup '}{eta}{sup '} final states},
author = {Adams, G. S. and Anderson, M. and Cummings, J. P. and Danko, I. and Napolitano, J. and He, Q. and Insler, J. and Muramatsu, H. and Park, C. S. and Thorndike, E. H. and Yang, F. and Coan, T. E. and Gao, Y. S. and Artuso, M. and Blusk, S. and Butt, J. and Li, J. and Menaa, N. and Mountain, R. and Nisar, S.},
abstractNote = {Using a sample of 3x10{sup 6} {psi}(2S) decays collected by the CLEO III and CLEO-c detector configurations, we present results of a study of {chi}{sub c0} and {chi}{sub c2} decays into {eta}{eta}, {eta}{eta}{sup '}, and {eta}{sup '}{eta}{sup '} final states. We find B({chi}{sub c0}{yields}{eta}{eta})=(0.31{+-}0.05{+-}0.04{+-}0.02)%, B({chi}{sub c0}{yields}{eta}{eta}{sup '})<0.05% at the 90% confidence level, and B({chi}{sub c0}{yields}{eta}{sup '}{eta}{sup '})=(0.17{+-}0.04{+-}0.02{+-}0.01)%. We also present upper limits for the decays of {chi}{sub c2} into these final states. These results give information on the decay mechanism of {chi}{sub c} states into pseudoscalars.},
doi = {10.1103/PHYSREVD.75.071101},
journal = {Physical Review. D, Particles Fields},
number = 7,
volume = 75,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2007},
month = {Sun Apr 01 00:00:00 EDT 2007}
}
  • No abstract prepared.
  • Using a sample of 2.59x10{sup 7} {psi}(2S) decays collected by the CLEO-c detector, we present results of a study of {chi}{sub c0} and {chi}{sub c2} decays into two-meson final states. We present the world's most precise measurements of the {chi}{sub cJ,(J=0,2)}{yields}{pi}{sup +}{pi}{sup -}, {pi}{sup 0}{pi}{sup 0}, K{sup +}K{sup -}, K{sub S}{sup 0}K{sub S}{sup 0}, {eta}{eta}, and {eta}{sup '}{eta}{sup '} branching fractions, and a search for {chi}{sub c} decays into {eta}{eta}{sup '}. These results shed light on the mechanism of charmonium decays into pseudoscalar mesons.
  • Using a sample of 1.06x10{sup 8} {psi}{sup '} decays collected by the BESIII detector, {chi}{sub c0} and {chi}{sub c2} decays into {pi}{sup 0{pi}0} and {eta}{eta} are studied. The branching fraction results are Br({chi}{sub c0{yields}{pi}}{sup 0{pi}0})=(3.23{+-}0.03{+-}0.23{+-}0.14)x10{sup -3}, Br({chi}{sub c2{yields}{pi}}{sup 0{pi}0})=(8.8{+-}0.2{+-}0.6{+-}0.4)x10{sup -4}, Br({chi}{sub c0{yields}{eta}{eta}})=(3.44{+-}0.10{+-}0.24{+-}0.2)x10{sup -3}, and Br({chi}{sub c2{yields}{eta}{eta}})=(6.5{+-}0.4{+-}0.5{+-}0.3)x10{sup -4}, where the uncertainties are statistical, systematic due to this measurement, and systematic due to the branching fractions of {psi}{sup '{yields}{gamma}{chi}}{sub cJ}. The results provide information on the decay mechanism of {chi}{sub c} states into pseudoscalars.
  • We report the branching ratios of the {chi}{sub c2}(1{sup 3}P{sub 2}) and {chi}{sub c0}(1{sup 3}P{sub 0}) charmonium resonances to two photons using event samples collected by Fermilab experiment E835 in the reactions p(bar sign)p{yields}{chi}{sub c2}(1{sup 3}P{sub 2})[{chi}{sub c0}(1{sup 3}P{sub 0})]. Our result for the {chi}{sub c2} is B({chi}{sub c2}{yields}{gamma}{gamma})=(1.35{+-}0.25{+-}0.12)x10{sup -4}. We set a 95% upper limit for the {chi}{sub c0} branching ratio B({chi}{sub c0}{yields}{gamma}{gamma}) at 2.09x10{sup -4}. (c) 2000 The American Physical Society.
  • We show that in the transitions {psi}{sup '}{yields}h{sub c}{pi}{sup 0} and {eta}{sub c}{sup '}{yields}{chi}{sub c0}{pi}{sup 0} the contributions from charmed-meson loops are highly suppressed, in contrast to various other charmonium decays. We calculate the width of the {psi}{sup '}{yields}h{sub c}{pi}{sup 0}, which agrees with the recent BES-III data, and predict the width of the {eta}{sub c}{sup '}{yields}{chi}{sub c0}{pi}{sup 0}, {Gamma}({eta}{sub c}{sup '}{yields}{chi}{sub c0}{pi}{sup 0})=1.5{+-}0.4 keV. A confirmation of this prediction would also provide additional support for a recent analysis of {psi}{sup '}{yields}J/{psi}{pi}{sup 0}({eta}), where loops are claimed to play a prominent role.