Phys. Rev. Lett.
86,
1167–1170
(2001)
First Observation of the Σc*+ Baryon and a New Measurement of the Σc*+ Mass
R. Ammar et al. (CLEO Collaboration)
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R. Ammar1, A. Bean1, D. Besson1, R. Davis1, N. Kwak1, X. Zhao1, S. Anderson2, V. V. Frolov2, Y. Kubota2, S. J. Lee2, R. Mahapatra2, J. J. O'Neill2, R. Poling2, T. Riehle2, A. Smith2, C. J. Stepaniak2, J. Urheim2, S. Ahmed3, M. S. Alam3, S. B. Athar3, L. Jian3, L. Ling3, M. Saleem3, S. Timm3, F. Wappler3, A. Anastassov4, J. E. Duboscq4, E. Eckhart4, K. K. Gan4, C. Gwon4, T. Hart4, K. Honscheid4, D. Hufnagel4, H. Kagan4, R. Kass4, T. K. Pedlar4, H. Schwarthoff4, J. B. Thayer4, E. von Toerne4, M. M. Zoeller4, S. J. Richichi5, H. Severini5, P. Skubic5, A. Undrus5, S. Chen6, J. Fast6, J. W. Hinson6, J. Lee6, D. H. Miller6, E. I. Shibata6, I. P. J. Shipsey6, V. Pavlunin6, D. Cronin-Hennessy7, A. L. Lyon7, E. H. Thorndike7, C. P. Jessop8, H. Marsiske8, M. L. Perl8, V. Savinov8, X. Zhou8, T. E. Coan9, V. Fadeyev9, Y. Maravin9, I. Narsky9, R. Stroynowski9, J. Ye9, T. Wlodek9, M. Artuso10, R. Ayad10, C. Boulahouache10, K. Bukin10, E. Dambasuren10, S. Karamov10, G. Majumder10, G. C. Moneti10, R. Mountain10, S. Schuh10, T. Skwarnicki10, S. Stone10, G. Viehhauser10, J. C. Wang10, A. Wolf10, J. Wu10, S. Kopp11, A. H. Mahmood12, S. E. Csorna13, I. Danko13, K. W. McLean13, Sz. Márka13, Z. Xu13, R. Godang14, K. Kinoshita14,*, I. C. Lai14, S. Schrenk14, G. Bonvicini15, D. Cinabro15, S. McGee15, L. P. Perera15, G. J. Zhou15, E. Lipeles16, S. P. Pappas16, M. Schmidtler16, A. Shapiro16, W. M. Sun16, A. J. Weinstein16, F. Würthwein16,†, D. E. Jaffe17, G. Masek17, H. P. Paar17, E. M. Potter17, S. Prell17, V. Sharma17, D. M. Asner18, A. Eppich18, T. S. Hill18, R. J. Morrison18, R. A. Briere19, G. P. Chen19, B. H. Behrens20, W. T. Ford20, A. Gritsan20, J. Roy20, J. G. Smith20, J. P. Alexander21, R. Baker21, C. Bebek21, B. E. Berger21, K. Berkelman21, F. Blanc21, V. Boisvert21, D. G. Cassel21, M. Dickson21, P. S. Drell21, K. M. Ecklund21, R. Ehrlich21, A. D. Foland21, P. Gaidarev21, R. S. Galik21, L. Gibbons21, B. Gittelman21, S. W. Gray21, D. L. Hartill21, B. K. Heltsley21, P. I. Hopman21, C. D. Jones21, D. L. Kreinick21, M. Lohner21, A. Magerkurth21, T. O. Meyer21, N. B. Mistry21, E. Nordberg21, J. R. Patterson21, D. Peterson21, D. Riley21, J. G. Thayer21, D. Urner21, B. Valant-Spaight21, A. Warburton21, P. Avery22, C. Prescott22, A. I. Rubiera22, J. Yelton22, J. Zheng22, G. Brandenburg23, A. Ershov23, Y. S. Gao23, D. Y.-J. Kim23, R. Wilson23, T. E. Browder24, Y. Li24, J. L. Rodriguez24, H. Yamamoto24, T. Bergfeld25, B. I. Eisenstein25, J. Ernst25, G. E. Gladding25, G. D. Gollin25, R. M. Hans25, E. Johnson25, I. Karliner25, M. A. Marsh25, M. Palmer25, C. Plager25, C. Sedlack25, M. Selen25, J. J. Thaler25, J. Williams25, K. W. Edwards26, R. Janicek27, P. M. Patel27, and A. J. Sadoff28 (CLEO Collaboration)
1University of Kansas, Lawrence, Kansas 66045
2University of Minnesota, Minneapolis, Minnesota 55455
3State University of New York at Albany, Albany, New York 12222
4Ohio State University, Columbus, Ohio 43210
5University of Oklahoma, Norman, Oklahoma 73019
6Purdue University, West Lafayette, Indiana 47907
7University of Rochester, Rochester, New York 14627
8Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
9Southern Methodist University, Dallas, Texas 75275
10Syracuse University, Syracuse, New York 13244
11University of Texas, Austin, Texas 78712
12University of Texas-Pan American, Edinburg, Texas 78539
13Vanderbilt University, Nashville, Tennessee 37235
14Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
15Wayne State University, Detroit, Michigan 48202
16California Institute of Technology, Pasadena, California 91125
17University of California, San Diego, La Jolla, California 92093
18University of California, Santa Barbara, California 93106
19Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
20University of Colorado, Boulder, Colorado 80309-0390
21Cornell University, Ithaca, New York 14853
22University of Florida, Gainesville, Florida 32611
23Harvard University, Cambridge, Massachusetts 02138
24University of Hawaii at Manoa, Honolulu, Hawaii 96822
25University of Illinois, Urbana-Champaign, Illinois 61801
26Carleton University, Ottawa, Ontario, Canada K1S 5B6
26band the Institute of Particle Physics, Canada
27McGill University, Montréal, Québec, Canada H3A 2T8
27band the Institute of Particle Physics, Canada
28Ithaca College, Ithaca, New York 14850
Received 19 July 2000; published in the issue dated 12 February 2001
Using data recorded with the CLEO II and CLEO II.V detector configurations at the Cornell Electron Storage Rings, we report the first observation and mass measurement of the Σc*+ charmed baryon, and an updated measurement of the mass of the Σc+ baryon. We find M(Σc*+)-M(Λc+) = (231.0±1.1±2.0) MeV, and M(Σc+)-M(Λc+) = (166.4±0.2±0.3) MeV, where the errors are statistical and systematic, respectively.
© 2001 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.1167
DOI:
10.1103/PhysRevLett.86.1167
*Permanent address: University of Cincinnati, Cincinnati, OH 45221. †Permanent address: Massachusetts Institute of Technology, Cambridge, MA 02139.
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