Experimental constraints on the spin and parity of the Lambdac(2880)+.
作者信息
Mizuk R, 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, Chen A, Chen K-F, Chen W T, Cheon B G, Chistov R, Choi Y, Choi Y K, Cole S, Dalseno J, Danilov M, Drutskoy A, Eidelman S, Epifanov D, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Ha H, Haba J, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou S, Hou W-S, Iijima T, Ikado K, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kaji H, Kang J H, Kapusta P, Katayama N, Khan H R, Kichimi H, Kim Y J, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo C C, Kuzmin A, Kwon Y-J, Leder G, Lee J, Lee M J, Lee S E, Lesiak T, Lin S-W, Liventsev D, Majumder G, Mandl F, Matsumoto T, Matyja A, McOnie S, Miyake H, Miyata H, Miyazaki Y, Nakao M, Natkaniec Z, Nishida S, Ogawa S, Ohshima T, Okuno S, Onuki Y, Ozaki H, Pakhlov P, Pakhlova G, Park H, Park K S, Peak L S, Pestotnik R, Piilonen L E, Sakai Y, Satoyama N, Schneider O, Schümann J, Seidl R, Senyo K, Sevior M E, Shapkin M, Shibuya H, Singh J B, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Suzuki S Y, Takasaki F, Tamai K, Tanaka M, Taylor G N, Teramoto Y, Tian X C, Tikhomirov I, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Usov Y, Varner G, Villa S, Wang C H, Watanabe Y, Won E, Xie Q L, Yabsley B D, Yamaguchi A, Yamashita Y, Yamauchi M, Yuan C Z, Zhang L M, Zhang Z P, Zhilich V, Zupanc A
机构信息
Institute for Theoretical and Experimental Physics, Moscow.
出版信息
Phys Rev Lett. 2007 Jun 29;98(26):262001. doi: 10.1103/PhysRevLett.98.262001. Epub 2007 Jun 28.
We report the results of several studies of the Lambda(c)(+)pi(+)pi(-)X final state in continuum e(+)e(-) annihilation data collected by the Belle detector. An analysis of angular distributions in Lambda(c)(2880)(+)-->Sigma(c)(2455)(0,++)pi(+,-) decays strongly favors a Lambda(c)(2880)(+) spin assignment of 5/2 over 3/2 or 1/2. We find evidence for Lambda(c)(2880)(+)-->Sigma(c)(2520)(0,++)pi(+,-) decay and measure the ratio of Lambda(c)(2880)(+) partial widths Gamma(Sigma(c)(2520)pi)/Gamma(Sigma(c)(2455)pi)=0.225+/-0.062+/-0.025. This value favors the Lambda(c)(2880)(+) spin-parity assignment of 5/2(+) over 5/2(-). We also report the first observation of Lambda(c)(2940)(+)-->Sigma(c)(2455)(0,++)pi(+,-) decay and measure Lambda(c)(2880)(+) and Lambda(c)(2940)(+) mass and width parameters. These studies are based on a 553 fb(-1) data sample collected at or near the Upsilon(4S) resonance at the KEKB collider.
Zotero 插件