Charmonium production in photon-photon collisions

H. Aihara, M. Alston-Garnjost, R. E. Avery, A. Barbaro-Galtieri, A. R. Barker, B. A. Barnett, D. A. Bauer, A. Bay, H. U. Bengtsson, G. J. Bobbink, C. D. Buchanan, A. Buijs, D. O. Caldwell, H. Y. Chao, S. B. Chun, A. R. Clark, G. D. Cowan, D. A. Crane, O. I. Dahl, M. DaoudiK. A. Derby, J. J. Eastman, P. H. Eberhard, T. K. Edberg, A. M. Eisner, R. Enomoto, F. C. Erné, K. H. Fairfield, J. M. Hauptman, W. Hofmann, J. Hylen, T. Kamae, H. S. Kaye, R. W. Kenney, S. Khacheryan, R. R. Kofler, W. G J Langeveld, J. G. Layter, W. T. Lin, F. L. Linde, S. C. Loken, A. Lu, G. R. Lynch, R. J. Madaras, B. D. Magnuson, G. E. Masek, L. G. Mathis, J. A J Matthews, S. J. Maxfield, E. S. Miller, W. Moses, D. R. Nygren, P. J. Oddone, H. P. Paar, Sung Keun Park, D. E. Pellett, M. Pripstein, M. T. Ronan, R. R. Ross, F. R. Rouse, K. A. Schwitkis, J. C. Sens, G. Shapiro, B. C. Shen, W. E. Slater, J. R. Smith, J. S. Steinman, R. W. Stephens, M. L. Stevenson, D. H. Stork, M. G. Strauss, M. K. Sullivan, T. Takahashi, S. Toutounchi, R. Van Tyen, G. J. Vandalen, W. Vernon, W. Wagner, E. M. Wang, Y. X. Wang, W. A. Wenzel, Z. R. Wolf, H. Yamamoto, S. J. Yellin, C. Zeitlin

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We have searched for the two-photon production of the c, 0, and 2 charmonium states at the SLAC e+e- collider PEP in the channels K± KS0 , K+K-+-, +- + -, and K+K-K+K-. We identify four c candidates in the K+K-K+K- channel on a negligible background; the one event among them implies a 95%-confidence-level (C.L.) lower limit for "( c) of 1.7 keV. In the other channels we find no evidence for any of the three states. We establish 95%-C.L. upper limits "(c)<15.5 keV, "(0)<17.0 keV, and " (2)<4.2 keV. From all channels combined, we obtain the value "(c)=6.4-3.4+5.0 keV.

Original languageEnglish
Pages (from-to)2355-2358
Number of pages4
JournalPhysical Review Letters
Issue number23
Publication statusPublished - 1988 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Aihara, H., Alston-Garnjost, M., Avery, R. E., Barbaro-Galtieri, A., Barker, A. R., Barnett, B. A., Bauer, D. A., Bay, A., Bengtsson, H. U., Bobbink, G. J., Buchanan, C. D., Buijs, A., Caldwell, D. O., Chao, H. Y., Chun, S. B., Clark, A. R., Cowan, G. D., Crane, D. A., Dahl, O. I., ... Zeitlin, C. (1988). Charmonium production in photon-photon collisions. Physical Review Letters, 60(23), 2355-2358.