Phys. Rev. Lett.
86,
4479–4482
(2001)
Observation of New States Decaying into Λc+π-π+
M. Artuso et al. (CLEO Collaboration)
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M. Artuso1, R. Ayad1, C. Boulahouache1, K. Bukin1, E. Dambasuren1, S. Karamov1, G. Majumder1, G. C. Moneti1, R. Mountain1, S. Schuh1, T. Skwarnicki1, S. Stone1, J. C. Wang1, A. Wolf1, J. Wu1, S. Kopp2, M. Kostin2, A. H. Mahmood3, S. E. Csorna4, I. Danko4, K. W. McLean4, Z. Xu4, R. Godang5, G. Bonvicini6, D. Cinabro6, M. Dubrovin6, S. McGee6, G. J. Zhou6, E. Lipeles7, S. P. Pappas7, M. Schmidtler7, A. Shapiro7, W. M. Sun7, A. J. Weinstein7, F. Würthwein7,*, D. E. Jaffe8, G. Masek8, H. P. Paar8, E. M. Potter8, S. Prell8, D. M. Asner9, A. Eppich9, T. S. Hill9, R. J. Morrison9, R. A. Briere10, G. P. Chen10, A. Gritsan11, J. P. Alexander12, R. Baker12, C. Bebek12, B. E. Berger12, K. Berkelman12, F. Blanc12, V. Boisvert12, D. G. Cassel12, P. S. Drell12, J. E. Duboscq12, K. M. Ecklund12, R. Ehrlich12, A. D. Foland12, P. Gaidarev12, R. S. Galik12, L. Gibbons12, B. Gittelman12, S. W. Gray12, D. L. Hartill12, B. K. Heltsley12, P. I. Hopman12, L. Hsu12, C. D. Jones12, J. Kandaswamy12, D. L. Kreinick12, M. Lohner12, A. Magerkurth12, T. O. Meyer12, N. B. Mistry12, E. Nordberg12, M. Palmer12, J. R. Patterson12, D. Peterson12, D. Riley12, A. Romano12, J. G. Thayer12, D. Urner12, B. Valant-Spaight12, G. Viehhauser12, A. Warburton12, P. Avery13, C. Prescott13, A. I. Rubiera13, H. Stoeck13, J. Yelton13, G. Brandenburg14, A. Ershov14, D. Y.-J. Kim14, R. Wilson14, T. Bergfeld15, B. I. Eisenstein15, J. Ernst15, G. E. Gladding15, G. D. Gollin15, R. M. Hans15, E. Johnson15, I. Karliner15, M. A. Marsh15, C. Plager15, C. Sedlack15, M. Selen15, J. J. Thaler15, J. Williams15, K. W. Edwards16a,16b, R. Janicek17a,17b, P. M. Patel17a,17b, A. J. Sadoff18, R. Ammar19, A. Bean19, D. Besson19, X. Zhao19, S. Anderson20, V. V. Frolov20, Y. Kubota20, S. J. Lee20, R. Mahapatra20, J. J. O'Neill20, R. Poling20, T. Riehle20, A. Smith20, C. J. Stepaniak20, J. Urheim20, S. Ahmed21, M. S. Alam21, S. B. Athar21, L. Jian21, L. Ling21, M. Saleem21, S. Timm21, F. Wappler21, A. Anastassov22, E. Eckhart22, K. K. Gan22, C. Gwon22, T. Hart22, K. Honscheid22, D. Hufnagel22, H. Kagan22, R. Kass22, T. K. Pedlar22, H. Schwarthoff22, J. B. Thayer22, E. von Toerne22, M. M. Zoeller22, S. J. Richichi23, H. Severini23, P. Skubic23, A. Undrus23, S. Chen24, J. Fast24, J. W. Hinson24, J. Lee24, D. H. Miller24, E. I. Shibata24, I. P. J. Shipsey24, V. Pavlunin24, D. Cronin-Hennessy25, A. L. Lyon25, E. H. Thorndike25, V. Savinov26, T. E. Coan27, V. Fadeyev27, Y. S. Gao27, Y. Maravin27, I. Narsky27, R. Stroynowski27, J. Ye27, and T. Wlodek27 (CLEO Collaboration)
1Syracuse University, Syracuse, New York 13244
2University of Texas, Austin, Texas 78712
3University of Texas-Pan American, Edinburg, Texas 78539
4Vanderbilt University, Nashville, Tennessee 37235
5Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
6Wayne State University, Detroit, Michigan 48202
7California Institute of Technology, Pasadena, California 91125
8University of California, San Diego, La Jolla, California 92093
9University of California, Santa Barbara, California 93106
10Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
11University of Colorado, Boulder, Colorado 80309-0390
12Cornell University, Ithaca, New York 14853
13University of Florida, Gainesville, Florida 32611
14Harvard University, Cambridge, Massachusetts 02138
15University of Illinois, Urbana-Champaign, Illinois 61801
16aCarleton University, Ottawa, Ontario, Canada K1S 5B6
16band the Institute of Particle Physics, Canada
17aMcGill University, Montréal, Québec, Canada H3A 2T8
17band the Institute of Particle Physics, Canada
18Ithaca College, Ithaca, New York 14850
19University of Kansas, Lawrence, Kansas 66045
20University of Minnesota, Minneapolis, Minnesota 55455
21State University of New York at Albany, Albany, New York 12222
22Ohio State University, Columbus, Ohio 43210
23University of Oklahoma, Norman, Oklahoma 73019
24Purdue University, West Lafayette, Indiana 47907
25University of Rochester, Rochester, New York 14627
26Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
27Southern Methodist University, Dallas, Texas 75275
Received 31 October 2000; published in the issue dated 14 May 2001
Using 13.7fb-1 of data recorded by the CLEO detector at the Cornell Electron Storage Ring, we investigate the spectrum of charmed baryons which decay into Λc+π-π+ and are more massive than the Λc+(2625) baryon. We find evidence for two new states: one is broad and has an invariant mass roughly 480 MeV above that of the Λc+ baryon; the other is narrow with an invariant mass of 596±1±2MeV above the Λc+ mass.
© 2001 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.4479
DOI:
10.1103/PhysRevLett.86.4479
*Permanent address: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139.
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