Measurement of γγ widths of charmonium states

W. Y. Chen, R. L. McIlwain, D. H. Miller, C. R. Ng, S. F. Schaffner, E. I. Shibata, W. M. Yao, K. Sparks, E. H. Thorndike, C. H. Wang, M. S. Alam, I. J. Kim, W. C. Li, X. C. Lou, C. R. Sun, P. N. Wang, M. I. Zoeller, D. Bortoletto, M. Goldberg, N. HorwitzV. Jain, M. D. Mestayer, G. C. Moneti, V. Sharma, I. P.J. Shipsey, T. Skwarnicki, M. Thulasidas, S. E. Csorna, T. Letson, J. Alexander, M. Artuso, C. Bebek, K. Berkelman, D. G. Cassel, E. Cheu, D. M. Coffman, G. Crawford, J. W. DeWire, P. S. Dell, R. Ehrlich, R. S. Galik, B. Gittlman, S. W. Gray, A. M. Halling, D. L. Hartill, B. K. Heltsley, J. Kandaswamy, N. Katayama, D. L. Kreinick, J. D. Lewis

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Abstract

Using the CLEO detector at the Cornell Electron Storage Ring, we have searched for two-photon production of charmonium in four-track final states. We have measured Γγγc)=5.9+2.1-1.8±1.9 keV, and we have obtained 95% CL upper limits of Γγγ(Xc0)<6.2 keV and Γγγ(Xc2)<1.0 keV.

Original languageEnglish (US)
Pages (from-to)169-174
Number of pages6
JournalPhysics Letters B
Volume243
Issue number1-2
DOIs
StatePublished - Jun 21 1990

Bibliographical note

Funding Information:
Jensen,t hanksJ ohn R. Smith for helpfuld iscussions regardingM onte Carlo generationo f two-photon processesF.o r their supportR, . Kass thankst heOJI programo f the DOE, P.S. Drell thankst hePYI pro-gramo f the NSF, and R. Poling thankst heA.P. Sloan foundationT. his work was supportedb y the National ScienceF oundationa nd by the US Department of Energy under contract Nos. DE-AC02-76ER01428, DE-AC02-83ER40103, DE-AC02-76ER03064, DE-AC02-76ER01545, DE-AC02-78ER5001,a nd DE-FG05-86ER40272T.h e Super-computingre sourcefso r the Cornell Theory Center were usedi n this research.

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