Observation of new states decaying into ΛcK-π+ and Λc+KS0π-

被引：218
作者：
Chistov, R. [1 ]
Abe, K.
Abe, K.
Adachi, I.
Aihara, H.
Anipko, D.
Aulchenko, V.
Aushev, T.
Bakich, A. M.
Balagura, V.
Barberio, E.
Bay, A.
Bedny, I.
Belous, K.
Bitenc, U.
Bizjak, I.
Blyth, S.
Bondar, A.
Bozek, A.
Bracko, M.
Brodzicka, J.
Browder, T. E.
Chang, M. -C.
Chao, Y.
Chen, A.
Chen, K. -F.
Chen, W. T.
Cheon, B. G.
Choi, Y.
Choi, Y. K.
Chuvikov, A.
Cole, S.
Dalseno, J.
Danilov, M.
Dash, M.
Dragic, J.
Drutskoy, A.
Eidelman, S.
Epifanov, D.
Gabyshev, N.
Garmash, A.
Gershon, T.
Go, A.
Gokhroo, G.
Golob, B.
Gorisek, A.
Ha, H.
Haba, J.
Hara, T.
Hayasaka, K.
机构：
[1] Inst Theoret & Expt Phys, Moscow 117259, Russia
[2] High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki, Japan
[3] Tohoku Gakuin Univ, Tagajo, Miyagi 985, Japan
[4] Univ Tokyo, Dept Phys, Tokyo 113, Japan
[5] Budker Inst Nucl Phys, Novosibirsk 630090, Russia
[6] Univ Sydney, Sydney, NSW 2006, Australia
[7] Univ Melbourne, Melbourne, Vic, Australia
[8] Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, CH-1015 Lausanne, Switzerland
[9] Inst High Energy Phys, Protvino, Russia
[10] Jozef Stefan Inst, Ljubljana, Slovenia
[11] Natl Cent Univ, Chungli 32054, Taiwan
[12] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland
[13] Univ Maribor, SLO-2000 Maribor, Slovenia
[14] Univ Hawaii, Honolulu, HI 96822 USA
[15] Tohoku Univ, Sendai, Miyagi 980, Japan
[16] Natl Taiwan Univ, Dept Phys, Taipei 10764, Taiwan
[17] Chonnam Natl Univ, Kwangju 500757, South Korea
[18] Sungkyunkwan Univ, Suwon 440746, South Korea
[19] Princeton Univ, Princeton, NJ 08544 USA
[20] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA
[21] Univ Cincinnati, Cincinnati, OH 45221 USA
[22] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India
[23] Univ Ljubljana, Ljubljana, Slovenia
[24] Korea Univ, Seoul 136701, South Korea
[25] Osaka Univ, Osaka, Japan
[26] Nagoya Univ, Nagoya, Aichi, Japan
[27] Nara Womens Univ, Nara 630, Japan
[28] Yonsei Univ, Seoul 120749, South Korea
[29] Chiba Univ, Chiba, Japan
[30] Niigata Univ, Niigata, Japan
[31] Tokyo Inst Technol, Tokyo 152, Japan
[32] Kyungpook Natl Univ, Taegu 702701, South Korea
[33] Panjab Univ, Chandigarh 160014, India
[34] Inst High Energy Phys, Vienna, Austria
[35] Seoul Natl Univ, Seoul, South Korea
[36] Tokyo Metropolitan Univ, Tokyo 158, Japan
[37] Osaka City Univ, Osaka 558, Japan
[38] Tokyo Univ Agr & Technol, Tokyo, Japan
[39] Toho Univ, Funabashi, Chiba 274, Japan
[40] Kanagawa Univ, Yokohama, Kanagawa, Japan
[41] Univ Illinois, Urbana, IL 61801 USA
[42] RIKEN BNL Res Ctr, Upton, NY 11973 USA
[43] Saga Univ, Saga 840, Japan
[44] Peking Univ, Beijing 100871, Peoples R China
[45] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China
[46] Nippon Dent Univ, Niigata, Japan
[47] Univ Sci & Technol China, Hefei 230026, Peoples R China
[48] Toyama Natl Coll Maritime Technol, Toyama, Japan
[49] Univ Tsukuba, Tsukuba, Ibaraki 305, Japan
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 16期
关键词：
D O I：
10.1103/PhysRevLett.97.162001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report the first observation of two charmed strange baryons that decay into Lambda K-+(c)-pi(+). The broader of the two states is measured to have a mass of 2978.5 +/- 2.1 +/- 2.0 MeV/c(2) and a width of 43.5 +/- 7.5 +/- 7.0 MeV/c(2). The mass and width of the narrow state are measured to be 3076.7 +/- 0.9 +/- 0.5 MeV/c(2) and 6.2 +/- 1.2 +/- 0.8 MeV/c(2), respectively. We also perform a search for the isospin partner states that decay into Lambda K-+(c)S(0)pi(-) and observe a significant signal at the mass of 3082.8 +/- 1.8 +/- 1.5 MeV/c(2). The data used for this analysis were accumulated at or near the Upsilon(4S) resonance, using the Belle detector at the e(+)e(-) asymmetric-energy collider KEKB. The integrated luminosity of the data sample used is 461.5 fb(-1).
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