Phys. Rev. D
56,
R2485–R2489
(1997)
ΛΛ̅ production in two-photon interactions
S. Anderson et al. (CLEO Collaboration)
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S. Anderson1, Y. Kubota1, M. Lattery1, J. J. O’Neill1, S. Patton1, R. Poling1, T. Riehle1, V. Savinov1, A. Smith1, M. S. Alam2, S. B. Athar2, Z. Ling2, A. H. Mahmood2, H. Severini2, S. Timm2, F. Wappler2, A. Anastassov3, S. Blinov3, J. E. Duboscq3, D. Fujino3, R. Fulton3, K. K. Gan3, T. Hart3, K. Honscheid3, H. Kagan3, R. Kass3, J. Lee3, M. B. Spencer3, M. Sung3, A. Undrus3, R. Wanke3, A. Wolf3, M. M. Zoeller3, B. Nemati4, S. J. Richichi4, W. R. Ross4, P. Skubic4, M. Wood4, M. Bishai5, J. Fast5, E. Gerndt5, J. W. Hinson5, N. Menon5, D. H. Miller5, E. I. Shibata5, I. P. J. Shipsey5, M. Yurko5, L. Gibbons6, S. D. Johnson6, Y. Kwon6, S. Roberts6, E. H. Thorndike6, C. P. Jessop7, K. Lingel7, H. Marsiske7, M. L. Perl7, S. F. Schaffner7, D. Ugolini7, R. Wang7, X. Zhou7, T. E. Coan8, V. Fadeyev8, I. Korolkov8, Y. Maravin8, I. Narsky8, V. Shelkov8, J. Staeck8, R. Stroynowski8, I. Volobouev8, J. Ye8, M. Artuso9, A. Efimov9, F. Frasconi9, M. Gao9, M. Goldberg9, D. He9, S. Kopp9, G. C. Moneti9, R. Mountain9, Y. Mukhin9, S. Schuh9, T. Skwarnicki9, S. Stone9, G. Viehhauser9, X. Xing9, J. Bartelt10, S. E. Csorna10, V. Jain10, S. Marka10, A. Freyberger11, D. Gibaut11, R. Godang11, K. Kinoshita11, I. C. Lai11, P. Pomianowski11, S. Schrenk11, G. Bonvicini12, D. Cinabro12, R. Greene12, L. P. Perera12, B. Barish13, M. Chadha13, S. Chan13, G. Eigen13, J. S. Miller13, C. O’Grady13, M. Schmidtler13, J. Urheim13, A. J. Weinstein13, F. Würthwein13, D. M. Asner14, D. W. Bliss14, W. S. Brower14, G. Masek14, H. P. Paar14, M. Sivertz14, J. Gronberg15, R. Kutschke15, D. J. Lange15, S. Menary15, R. J. Morrison15, S. Nakanishi15, H. N. Nelson15, T. K. Nelson15, C. Qiao15, J. D. Richman15, D. Roberts15, A. Ryd15, H. Tajima15, M. S. Witherell15, R. Balest16, B. H. Behrens16, K. Cho16, W. T. Ford16, H. Park16, P. Rankin16, J. Roy16, J. G. Smith16, J. P. Alexander17, C. Bebek17, B. E. Berger17, K. Berkelman17, K. Bloom17, D. G. Cassel17, H. A. Cho17, D. M. Coffman17, D. S. Crowcroft17, M. Dickson17, P. S. Drell17, K. M. Ecklund17, R. Ehrlich17, R. Elia17, A. D. Foland17, P. Gaidarev17, R. S. Galik17, B. Gittelman17, S. W. Gray17, D. L. Hartill17, B. K. Heltsley17, P. I. Hopman17, S. L. Jones17, J. Kandaswamy17, N. Katayama17, P. C. Kim17, D. L. Kreinick17, T. Lee17, Y. Liu17, G. S. Ludwig17, J. Masui17, J. Mevissen17, N. B. Mistry17, C. R. Ng17, E. Nordberg17, M. Ogg17, J. R. Patterson17, D. Peterson17, D. Riley17, A. Soffer17, C. Ward17, M. Athanas18, P. Avery18, C. D. Jones18, M. Lohner18, C. Prescott18, S. Yang18, J. Yelton18, J. Zheng18, G. Brandenburg19, R. A. Briere19, Y. S. Gao19, D. Y.-J. Kim19, R. Wilson19, H. Yamamoto19, T. E. Browder20, F. Li20, Y. Li20, J. L. Rodriguez20, T. Bergfeld21, B. I. Eisenstein21, J. Ernst21, G. E. Gladding21, G. D. Gollin21, R. M. Hans21, E. Johnson21, I. Karliner21, M. A. Marsh21, M. Palmer21, M. Selen21, J. J. Thaler21, K. W. Edwards22, A. Bellerive23, R. Janicek23, D. B. MacFarlane23, K. W. McLean23, P. M. Patel23, A. J. Sadoff24, R. Ammar25, P. Baringer25, A. Bean25, D. Besson25, D. Coppage25, C. Darling25, R. Davis25, N. Hancock25, S. Kotov25, I. Kravchenko25, and N. Kwak25 (CLEO Collaboration)
1University of Minnesota, Minneapolis, Minnesota 55455
2State University of New York at Albany, Albany, New York 12222
3Ohio State University, Columbus, Ohio 43210
4University of Oklahoma, Norman, Oklahoma 73019
5Purdue University, West Lafayette, Indiana 47907
6University of Rochester, Rochester, New York 14627
7Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
8Southern Methodist University, Dallas, Texas 75275
9Syracuse University, Syracuse, New York 13244
10Vanderbilt University, Nashville, Tennessee 37235
11Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
12Wayne State University, Detroit, Michigan 48202
13California Institute of Technology, Pasadena, California 91125
14University of California, San Diego, La Jolla, California 92093
15University of California, Santa Barbara, California 93106
16University of Colorado, Boulder, Colorado 80309-0390
17Cornell University, Ithaca, New York 14853
18University of Florida, Gainesville, Florida 32611
19Harvard University, Cambridge, Massachusetts 02138
20University of Hawaii at Manoa, Honolulu, Hawaii 96822
21University of Illinois, Champaign-Urbana, Illinois 61801
22Carleton University and the Institute of Particle Physics, Ottawa, Ontario, Canada K1S 5B6
23McGill University and the Institute of Particle Physics, Montréal, Québec, Canada H3A 2T8
24Ithaca College, Ithaca, New York 14850
25University of Kansas, Lawrence, Kansas 66045
Received 17 January 1997; published in the issue dated 1 September 1997
Using the CLEO detector at the Cornell e+e- storage ring CESR we study the two-photon production of ΛΛ̅ , making the first observation of γγ→ΛΛ̅ . We present the cross section for γγ→ΛΛ̅ as a function of the γγ center of mass energy and compare it to that predicted by the quark-diquark model.
© 1997 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.56.R2485
DOI:
10.1103/PhysRevD.56.R2485
PACS:
13.65.+i, 12.39.Ki, 14.20.Jn
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