Evidence of new states decaying into Xi*(c)pi
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2001-05Published Version
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Using 13.7 fb(-1) of data recorded by the CLEO detector at Cornell Electron Storage Ring, we report evidence of two new charmed baryons: one decaying into Xi (0 ')(c)pi (+) with the subsequent decay Xi (0)(c)' --> Xi (0)(c)gamma, and its isospin partner decaying into Xi (+)(c)' pi (-) followed by Xi (+)(c)' --> Xi (+)(c)gamma. We measure the following mass differences for the two states: M(Xi (0)(c)gamma pi (+)) - M(Xi (0)(c)) = 318.2 +/- 1.3 +/- 2.9 MeV and M(Xi (+)(c)gamma pi (-)) - M(Xi (+)(c)) = 324.0 +/- 1.3 +/- 3.0 MeV. We interpret these new states as the J(P) = 1/2(-) Xi (c1) particles, the charmed-strange analogs of the Lambda (+)(c1)(2593).
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Csorna, SE; Danko, I; McLean, KW; Xu, Z; Godang, R; Bonvicini, G; Cinabro, D; Dubrovin, M; McGee, S; Zhou, GJ; Bornheim, A; Lipeles, E; Pappas, SP; Schmidtler, M; Shapiro, A; Sun, WM; Weinstein, AJ; Jaffe, DE; Masek, G; Paar, HP; Asner, DM; Eppich, A; Hill, TS; Morrison, RJ; Briere, RA; Chen, GP; Ferguson, T; Vogel, H; Gritsan, A; Alexander, JP; Baker, R; Bebek, C; Berger, BE; Berkelman, K; Blanc, F; Boisvert, V; Cassel, DG; Drell, PS; Duboscq, JE; Ecklund, KM; Ehrlich, R; Foland, AD; Graidarev, P; Galik, RS; Gibbons, L; Gittelman, B; Gray, SW; Hartill, DL; Heltsley, BK; Hopman, PI; Hsu, L; Jones, CD; Kandaswamy, J; Kreinick, DL; Lohner, M; Magerkurth, A; Meyer, TO; Mistry, NB; Nordberg, E; Palmer, M; Patterson, JR; Peterson, D; Riley, D; Romano, A; Thayer, JG; Urner, D; Valant-Spaight, B; Viehhauser, G; Warburton, A; Avery, P; Prescott, C; Rubiera, AI; Stoeck, H; Yelton, J; Brandenburg, G; Ershov, A; Kim, DYJ; Wilson, R; Bergfeld, T; Eisenstein, BI; Ernst, J; Gladding, GE; Gollin, GD; Hans, RM; Johnson, E; Karliner, I; Marsh, MA; Plager, C; Sedlack, C; Selen, M; Thaler, JJ; Williams, J; Edwards, KW; Janicek, R; Patel, PM; Sadoff, AJ; Ammar, R; Bean, A; Besson, D; Zhao, X; Anderson, S; Frolov, VV; Kubota, Y; Lee, SJ; Mahapatra, R; O'Neill, JJ; Poling, R; Riehle, T; Smith, A; Stepaniak, CJ; Urheim, J; Ahmed, S; Alam, MS; Athar, SB; Jian, L; Ling, L; Saleem, M; Timm, S; Wappler, F; Anastassov, A; Eckhart, E; Gan, KK; Gwon, C; Hart, T; Honscheid, K; Hufnagel, D; Kagan, H; Kass, R; Pedlar, TK; Schwarthoff, H; Thayer, JB; von Toerne, E; Zoeller, MM; Richichi, SJ; Severini, H; Skubic, P; Undrus, A; Savinov, V; Chen, S; Fast, J; Hinson, JW; Lee, J; Miller, DH; Shibata, EI; Shipsey, IPJ; Pavlunin, V; Cronin-Hennessy, D; Lyon, AL; Thorndike, EH; Coan, TE; Fadeyev, V; Gao, YS; Maravin, Y; Narsky, I; Stroynowski, R; Ye, J; Wlodek, T; Artuso, M; Ayad, R; Boulahouache, C; Bukin, K; Dambasuren, E; Majumder, G; Moneti, GC; Mountain, R; Schuh, S; Skwarnicki, T; Stone, S; Wang, JC; Wolf, A; Wu, J; Kopp, S; Kostin, M; Mahmood, AH. Evidence of new states decaying into Xi*(c)pi. PHYSICAL REVIEW LETTERS. May 2001. 86(19) : 4243-4246
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