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, S. K. 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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23 Citations (Scopus)

Abstract

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
Volume60
Issue number23
DOIs
Publication statusPublished - 1988

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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