Observation of an isotriplet of excited charmed baryons decaying to lambda+c pi

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(+3.2+2.1)(-3.1-6.0) MeV/c(2), 61(+18+22)(-13-13) MeV for the neut...

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Veröffentlicht in:	Physical review letters 2005-04, Vol.94 (12), p.122002, Article 122002
Hauptverfasser:	Mizuk, R, Abe, K, Aihara, H, Akatsu, M, Asano, Y, Aulchenko, V, Aushev, T, Bakich, A M, Balagura, V, Ban, Y, Banerjee, S, Bedny, I, Bitenc, U, Bizjak, I, Blyth, S, Bondar, A, Bozek, A, Bracko, M, Brodzicka, J, Browder, T E, Chao, Y, Chen, A, Cheon, B G, Chistov, R, Choi, S-K, 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, N C, Hayasaka, K, Hayashii, H, Hazumi, M, Hokuue, T, Hoshi, Y, Hou, S, Hou, W-S, Hsiung, Y B, Iijima, T, Imoto, A, Inami, K, Ishikawa, A, Itoh, R, Iwasaki, M, Iwasaki, Y, Kang, J H, Kang, J S, Kapusta, P, Katayama, N, Kawai, H, Kawasaki, T, Khan, H R, Kichimi, H, Kim, H J, Kim, J H, Kim, S K, Kim, S M, Koppenburg, P, Korpar, S, Krizan, P, Krokovny, P, Kulasiri, R, Kuo, C C, Kuzmin, A, Kwon, Y-J, Lee, S E, Lee, S H, Lesiak, T, Li, J, Lin, S-W, Liventsev, D, Majumder, G, Mandl, F, Matsumoto, T, Mitaroff, W, Miyake, H, Miyata, H, Mohapatra, D, Mori, T, Nagamine, T, Nagasaka, Y, Nakano, E, Nakao, M, Nishida, S, Ogawa, S, Ohshima, T, Okabe, T, Okuno, S
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Sprache:	eng
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Zusammenfassung:	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(+3.2+2.1)(-3.1-6.0) MeV/c(2), 61(+18+22)(-13-13) MeV for the neutral state; 505.4(+5.8+12.4)(-4.6-2.0) MeV/c(2), 62(+37+52)(-23-38) MeV for the charged state; and 514.5(+3.4+2.8)(-3.1-4.9) MeV/c(2), 75(+18+12)(-13-11) 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.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.94.122002