Phys. Rev. Lett.
86,
4243–4246
(2001)
Evidence of New States Decaying into Ξc*π
S. E. Csorna et al. (CLEO Collaboration)
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S. E. Csorna1, I. Danko1, K. W. McLean1, Z. Xu1, R. Godang2, G. Bonvicini3, D. Cinabro3, M. Dubrovin3, S. McGee3, G. J. Zhou3, A. Bornheim4, E. Lipeles4, S. P. Pappas4, M. Schmidtler4, A. Shapiro4, W. M. Sun4, A. J. Weinstein4, D. E. Jaffe5, G. Masek5, H. P. Paar5, D. M. Asner6, A. Eppich6, T. S. Hill6, R. J. Morrison6, R. A. Briere7, G. P. Chen7, T. Ferguson7, H. Vogel7, A. Gritsan8, J. P. Alexander9, R. Baker9, C. Bebek9, B. E. Berger9, K. Berkelman9, F. Blanc9, V. Boisvert9, D. G. Cassel9, P. S. Drell9, J. E. Duboscq9, K. M. Ecklund9, R. Ehrlich9, A. D. Foland9, P. Gaidarev9, R. S. Galik9, L. Gibbons9, B. Gittelman9, S. W. Gray9, D. L. Hartill9, B. K. Heltsley9, P. I. Hopman9, L. Hsu9, C. D. Jones9, J. Kandaswamy9, D. L. Kreinick9, M. Lohner9, A. Magerkurth9, T. O. Meyer9, N. B. Mistry9, E. Nordberg9, M. Palmer9, J. R. Patterson9, D. Peterson9, D. Riley9, A. Romano9, J. G. Thayer9, D. Urner9, B. Valant-Spaight9, G. Viehhauser9, A. Warburton9, P. Avery10, C. Prescott10, A. I. Rubiera10, H. Stoeck10, J. Yelton10, G. Brandenburg11, A. Ershov11, D. Y.-J. Kim11, R. Wilson11, T. Bergfeld12, B. I. Eisenstein12, J. Ernst12, G. E. Gladding12, G. D. Gollin12, R. M. Hans12, E. Johnson12, I. Karliner12, M. A. Marsh12, C. Plager12, C. Sedlack12, M. Selen12, J. J. Thaler12, J. Williams12, K. W. Edwards13a,13b, R. Janicek14a,14b, P. M. Patel14a,14b, A. J. Sadoff15, R. Ammar16, A. Bean16, D. Besson16, X. Zhao16, S. Anderson17, V. V. Frolov17, Y. Kubota17, S. J. Lee17, R. Mahapatra17, J. J. O'Neill17, R. Poling17, T. Riehle17, A. Smith17, C. J. Stepaniak17, J. Urheim17, S. Ahmed18, M. S. Alam18, S. B. Athar18, L. Jian18, L. Ling18, M. Saleem18, S. Timm18, F. Wappler18, A. Anastassov19, E. Eckhart19, K. K. Gan19, C. Gwon19, T. Hart19, K. Honscheid19, D. Hufnagel19, H. Kagan19, R. Kass19, T. K. Pedlar19, H. Schwarthoff19, J. B. Thayer19, E. von Toerne19, M. M. Zoeller19, S. J. Richichi20, H. Severini20, P. Skubic20, A. Undrus20, V. Savinov21, S. Chen22, J. Fast22, J. W. Hinson22, J. Lee22, D. H. Miller22, E. I. Shibata22, I. P. J. Shipsey22, V. Pavlunin22, D. Cronin-Hennessy23, A. L. Lyon23, E. H. Thorndike23, T. E. Coan24, V. Fadeyev24, Y. S. Gao24, Y. Maravin24, I. Narsky24, R. Stroynowski24, J. Ye24, T. Wlodek24, M. Artuso25, R. Ayad25, C. Boulahouache25, K. Bukin25, E. Dambasuren25, G. Majumder25, G. C. Moneti25, R. Mountain25, S. Schuh25, T. Skwarnicki25, S. Stone25, J. C. Wang25, A. Wolf25, J. Wu25, S. Kopp26, M. Kostin26, and A. H. Mahmood27 (CLEO Collaboration)
1Vanderbilt University, Nashville, Tennessee 37235
2Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
3Wayne State University, Detroit, Michigan 48202
4California Institute of Technology, Pasadena, California 91125
5University of California, San Diego, La Jolla, California 92093
6University of California, Santa Barbara, California 93106
7Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
8University of Colorado, Boulder, Colorado 80309-0390
9Cornell University, Ithaca, New York 14853
10University of Florida, Gainesville, Florida 32611
11Harvard University, Cambridge, Massachusetts 02138
12University of Illinois, Urbana-Champaign, Illinois 61801
13aCarleton University, Ottawa, Ontario, Canada K1S 5B6
13band the Institute of Particle Physics, Canada
14aMcGill University, Montréal, Québec, Canada H3A 2T8
14band the Institute of Particle Physics, Canada
15Ithaca College, Ithaca, New York 14850
16University of Kansas, Lawrence, Kansas 66045
17University of Minnesota, Minneapolis, Minnesota 55455
18State University of New York at Albany, Albany, New York 12222
19Ohio State University, Columbus, Ohio 43210
20University of Oklahoma, Norman, Oklahoma 73019
21University of Pittsburgh, Pittsburgh, Pennsylvania 15260
22Purdue University, West Lafayette, Indiana 47907
23University of Rochester, Rochester, New York 14627
24Southern Methodist University, Dallas, Texas 75275
25Syracuse University, Syracuse, New York 13244
26University of Texas, Austin, Texas 78712
27University of Texas-Pan American, Edinburg, Texas 78539
Received 7 December 2000; published in the issue dated 7 May 2001
Using 13.7fb-1 of data recorded by the CLEO detector at Cornell Electron Storage Ring, we report evidence of two new charmed baryons: one decaying into Ξc0′π+ with the subsequent decay Ξc0′→Ξc0γ, and its isospin partner decaying into Ξc+′π- followed by Ξc+′→Ξc+γ. We measure the following mass differences for the two states: M(Ξc0γπ+)-M(Ξc0) = 318.2±1.3±2.9MeV and M(Ξc+γπ-)-M(Ξc+) = 324.0±1.3±3.0MeV. We interpret these new states as the JP = 1/2- Ξc1 particles, the charmed-strange analogs of the Λc1+(2593).
© 2001 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.4243
DOI:
10.1103/PhysRevLett.86.4243
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