对衰变B0→Λ⁺C⁻的观测
Observation of the decay B0-->lambda+cp.
作者信息
Gabyshev N, Kichimi H, Abe K, Abe K, Abe R, Abe T, Adachi I, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich A M, Ban Y, Banas E, Bay A, Bedny I, Bizjak I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder T E, Casey B C K, Chang M-C, Chang P, Chao Y, Chen K-F, Cheon B G, Chistov R, Choi S-K, Choi Y, Choi Y K, Danilov M, Dong L Y, Dragic J, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fang F, Fukunaga C, Garmash A, Gershon T, Golob B, Haba J, Hagner C, Handa F, Hara T, Hasuko K, Hayashii H, Hazumi M, Higuchi I, Hinz L, Hojo T, Hokuue T, Hoshi Y, Hou W-S, Hsiung Y B, Huang H-C, Igaki T, Igarashi Y, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki Y, Jang H K, Kang J H, Kang J S, Kapusta P, Kataoka S U, Katayama N, Kawai H, Kawai H, Kawasaki T, Kim D W, Kim H J, Kim H O, Kim Hyunwoo, Kim J H, Kim S K, Kinoshita K, Kobayashi S, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kuzmin A, Kwon Y-J, Lange J S, Leder G, Lee S H, Li J, Lin S-W, Liventsev D, Lu R-S, MacNaughton J, Majumder G, Mandl F, Matsuishi T, Matsumoto S, Matsumoto T, Mitaroff W, Miyabayashi Y, Miyake H, Miyata H, Moloney G R, Mori T, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Nam J W, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen S L, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park C W, Park H, Park K S, Peak L S, Perroud J-P, Piilonen L E, Rozanska M, Rybicki K, Sagawa H, Saitoh S, Sakai Y, Sarangi T R, Satapathy M, Satpathy A, Schneider O, Schrenk S, Schümann J, Schwartz A J, Semenov S, Senyo K, Seuster R, Sevior M E, Shibuya H, Shwartz B, Sidorov V, Singh J B, Soni N, Stanic S, Staric M, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki S Y, Swain S K, Takahashi T, Takasaki F, Tamai K, Tamura N, Tanaka J, Tanaka M, Taylor G N, Teramoto Y, Tokuda S, Tomura T, Tsuboyama T, Tsukamoto T, Uehara S, Unno Y, Uno S, Varner G, Varvell K E, Wang C C, Wang C H, Wang J G, Wang M-Z, Watanabe Y, Won E, Yabsley B D, Yamada Y, Yamaguchi A, Yamashita Y, Yamashita Y, Yamauchi M, Yanai H, Yuan Y, Yusa Y, Zhang C C, Zhang Z P, Zheng Y, Zhilich V, Zontar D
机构信息
High Energy Accelerator Research Organization (KEK), Tsukuba.
出版信息
Phys Rev Lett. 2003 Mar 28;90(12):121802. doi: 10.1103/PhysRevLett.90.121802. Epub 2003 Mar 26.
We report the measurement of the charmed baryonic decay B(0)-->Lambda(+)(c)p with a branching fraction of (2.19(+0.56)(-0.49)+/-0.32+/-0.57)x10(-5) and a statistical significance of 5.8 sigma. The errors are statistical, systematic, and the error of the Lambda(+)(c)-->pK(-)pi(+) decay branching fraction. This is the first observation of a two-body baryonic B decay. The analysis is based on 78.2 fb(-1) of data accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric e(+)e(-) collider.
我们报告了对粲重子衰变(B^0\to\Lambda_c^+p)的测量，其分支比为((2.19(+0.56)(-0.49)\pm0.32\pm0.57)\times10^{-5})，统计显著性为(5.8\sigma)。误差包括统计误差、系统误差以及(\Lambda_c^+\to pK^-\pi^+)衰变分支比的误差。这是首次观测到两体重子(B)衰变。该分析基于在KEKB非对称(e^+e^-)对撞机上使用Belle探测器在(\Upsilon(4S))共振处积累的(78.2) (fb^{-1})数据。
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