Chistov R, 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, Hayashii H, Hazumi M, Heffernan D, 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, Katayama N, Kawai H, Kawasaki T, Khan H R, Kichimi H, Kim H J, Kim H O, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo C C, Kuzmin A, Kwon Y-J, Leder G, Lee J, Lesiak T, Lin S-W, Liventsev D, Mandl F, Marlow D, Matsumoto T, Matyja A, McOnie S, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney G R, Nagamine T, Nakano E, Nakao M, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen S L, Onuki Y, Ozaki H, Pakhlov P, Pakhlova G, Palka H, Park H, Park K S, Pestotnik R, Piilonen L E, Sakai Y, Schietinger T, Schneider O, Schwartz A J, Seidl R, Sevior M E, Shapkin M, Shibuya H, Shwartz B, Sidorov V, Singh J B, Sokolov A, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Sumiyoshi T, Suzuki S, Takasaki F, Tamura N, Tanaka M, Taylor G N, Teramoto Y, Tian X C, Tikhomirov I, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Usov Y, Varner G, Villa S, Wang C C, Wang C H, Wang M-Z, Watanabe Y, Won E, Wu C-H, Xie Q L, Yabsley B D, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang L M, Zhang Z P
Institute for Theoretical and Experimental Physics, Moscow, Russia.
Phys Rev Lett. 2006 Oct 20;97(16):162001. doi: 10.1103/PhysRevLett.97.162001. Epub 2006 Oct 17.
We report the first observation of two charmed strange baryons that decay into Lambda(c)(+)Kappa(-)pi(+). The broader of the two states is measured to have a mass of 2978.5+/-2.1+/-2.0 MeV/c2 and a width of 43.5+/-7.5+/-7.0 MeV/c2. 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/c2, respectively. We also perform a search for the isospin partner states that decay into Lambda(c)(+)Kappa(0)/(s)pi(-) and observe a significant signal at the mass of 3082.8+/-1.8+/-1.5 MeV/c2. 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).
我们报告了首次观测到两个衰变到Λc(+)K−π+的粲奇异重子。测量到这两个态中较宽的那个质量为2978.5±2.1±2.0 MeV/c2，宽度为43.5±7.5±7.0 MeV/c2。窄态的质量和宽度分别测量为3076.7±0.9±0.5 MeV/c2和6.2±1.2±0.8 MeV/c2。我们还对衰变到Λc(+)K0/(s)π−的同位旋伙伴态进行了搜寻，并在质量为3082.8±1.8±1.5 MeV/c2处观测到一个显著信号。本分析所用数据是在Υ(4S)共振处或其附近积累的，使用的是e+e−非对称能量对撞机KEKB上的Belle探测器。所用数据样本的积分亮度为461.5 fb−1。
