Observation Of A Narrow State Decaying Into Xi(C) (0)Pi(+)

Pl Frabetti,Hwk Cheung,Jp Cumalat, C Dallapiccola,Jf Ginkel,We Johns,Ms Nehring,Ew Vaandering,Jn Butler, S Cihangir, I Gaines,Ph Garbincius, L Garren,Sa Gourlay,Dj Harding, P Kasper, A Kreymer, P Lebrun, S Shukla, M Vittone, S Bianco,Fl Fabbri, S Sarwar, A Zallo, C Cawlfield, R Culbertson,Rw Gardner, E Gottschalk, R Greene, K Park, A Rahimi, J Wiss, G Alimonti, G Bellini,M Boschini, D Brambilla, B Caccianiga, L Cinquini, M Di Corato, P Dini, M Giammarchi, P Inzani, F Leveraro,S Malvezzi, D Menasce, E Meroni, L Milazzo, L Moroni, D Pedrini, L Perasso, F Prelz, A Sala, S Sala, D Torretta, D Buchholz, D Claes, B Gobbi, B O'Reilly,Jm Bishop,Nm Cason,Cj Kennedy,Gn Kim, Tf Lin, Dl Puseljic,Rc Ruchti,Wd Shephard,Ja Swiatek,Zy Wu, V Arena, G Boca, G Bonomi, C Castoldi, G Gianini, M Merlo,Sp Ratti, C Riccardi, L Viola, P Vitulo, A Lopez, L Mendez, A Mirles, E Montiel, D Olaya, E Ramirez, C Rivera, Y Zhang,Jm Link,Vs Paolone, Pm Yager,Jr Wilson, J Gao, M Hosack,Pd Sheldon, F Davenport, K Cho, K Danyo, T Handler,Bg Cheon,Ys Chung,Js Kang,Ky Kim,Kb Lee, Ss Myung

PHYSICS LETTERS B（1998）

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摘要

We report the observation of the Xi(c)(*+) state decaying into Xi(c)(0)pi(+) with Xi(c)(0 )-->( )Lambda (K) over bar(0)pi(+)pi(-) or Lambda K(-)pi(+)pi(+)pi(-). We have observed 47 +/- 11 candidate events for the Xi(c)(*+) state and measured its mass to be 177.1 +/- 0.5 +/- 1.1 MeV/c(2) above the Xi(c)(0) mass. We have also measured the Xi(c)(0) mass to be 2470.0 +/- 2.8 +/- 2.6 MeV/c(2). (C) 1998 Published by Elsevier Science B.V. All rights reserved.

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