Observation of an isotriplet of excited charmed baryons decaying to Λc+π -: art. no. 122002

被引：126

作者：

Mizuk, R ^{[1
]}

Abe, K

Aihara, H

Akatsu, M

Asano, Y

Aulchenko, V

Aushev, T

Bakich, AM

Balagura, V

Ban, Y

Banerjee, S

Bedny, I

Bitenc, U

Bizjak, I

Blyth, S

Bondar, A

Bozek, A

Bracko, M

Brodzicka, J

Browder, TE

Chao, Y

Chen, A

Cheon, BG

Chistov, R

Choi, SK

Choi, Y

Chuvikov, A

Cole, S

Dalseno, J

Danilov, M

Dash, M

Dragic, J

Drutskoy, A

Eidelman, S

Fratina, S

Gabyshev, N

Garmash, A

Gershon, T

Gokhroo, G

Haba, J

Hastings, NC

Hayasaka, K

Hayashii, H

Hazumi, M

Hokuue, T

Hoshi, Y

Hou, S

Hou, WS

Hsiung, YB

机构：

[1] Inst Theoret & Expt Phys, Moscow 117259, Russia

[2] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[3] Chiba Univ, Chiba, Japan

[4] Chonnam Natl Univ, Kwangju, South Korea

[5] Univ Cincinnati, Cincinnati, OH 45221 USA

[6] Gyeongsang Natl Univ, Chinju, South Korea

[7] Univ Hawaii, Honolulu, HI 96822 USA

[8] KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki, Japan

[9] Hiroshima Inst Technol, Hiroshima, Japan

[10] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China

[11] Inst High Energy Phys, Vienna, Austria

[12] Jozef Stefan Inst, Ljubljana, Slovenia

[13] Kanagawa Univ, Yokohama, Kanagawa, Japan

[14] Korea Univ, Seoul 136701, South Korea

[15] Kyungpook Natl Univ, Taegu 702701, South Korea

[16] Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol Lausanne, CH-1015 Lausanne, Switzerland

[17] Univ Ljubljana, Ljubljana, Slovenia

[18] Univ Maribor, SLO-2000 Maribor, Slovenia

[19] Univ Melbourne, Parkville, Vic 3052, Australia

[20] Nagoya Univ, Nagoya, Aichi, Japan

[21] Nara Womens Univ, Nara 630, Japan

[22] Natl Cent Univ, Chungli 32054, Taiwan

[23] Natl United Univ, Miaoli, Taiwan

[24] Natl Taiwan Univ, Dept Phys, Taipei, Taiwan

[25] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland

[26] Nihon Dent Coll, Niigata, Japan

[27] Niigata Univ, Niigata, Japan

[28] Osaka City Univ, Osaka 558, Japan

[29] Osaka Univ, Osaka, Japan

[30] Panjab Univ, Chandigarh 160014, India

[31] Peking Univ, Beijing 100871, Peoples R China

[32] Princeton Univ, Princeton, NJ 08545 USA

[33] Univ Sci & Technol China, Hefei 230026, Peoples R China

[34] Seoul Natl Univ, Seoul, South Korea

[35] Sungkyunkwan Univ, Suwon, South Korea

[36] Univ Sydney, Sydney, NSW 2006, Australia

[37] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

[38] Toho Univ, Funabashi, Chiba 274, Japan

[39] Tohoku Gakuin Univ, Tagajo, Miyagi, Japan

[40] Tohoku Univ, Sendai, Miyagi 980, Japan

[41] Univ Tokyo, Dept Phys, Tokyo 113, Japan

[42] Tokyo Inst Technol, Tokyo 152, Japan

[43] Tokyo Metropolitan Univ, Tokyo 158, Japan

[44] Univ Tsukuba, Tsukuba, Ibaraki 305, Japan

[45] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA

[46] Yonsei Univ, Seoul 120749, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.94.122002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the observation of an isotriplet of excited charmed baryons, decaying into Lambda(+)(c)pi(-), Lambda(+)(c)pi(0), and Lambda(+)(c)pi(+). We measure the mass differences M(Lambda(+)(c)pi)-M(Lambda(+)(c)) and widths to be 515.4(-3.1-6.0)(+3.2+2.1) MeV/c(2), 61(-13-13)(+18+22) MeV for the neutral state; 505.4(-4.6-2.0)(+5.8+12.4) MeV/c(2), 62(-23-38)(+37+52) MeV for the charged state; and 514.5(-3.1-4.9)(+3.4+2.8) MeV/c(2), 75(-13-11)(+18+12) MeV for the doubly charged state, where the uncertainties are statistical and systematic, respectively. These results are obtained from a 281 fb(-1) data sample collected with the Belle detector near the Upsilon(4S) resonance, at the KEKB asymmetric energy e(+)e(-) collider.

引用

页数：5

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