对B(+)→ppπ⁺、B⁰→ppK⁰和B(+)→ppK*(+)的观测
Observation of B(+)-->pppi+, B0-->ppK0, and B(+)-->ppK(*+).
作者信息
Wang M-Z, Abe K, Abe K, Abe T, Adachi I, Aihara H, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich A M, Bay A, Bizjak I, Bondar A, Bozek A, Bracko M, Browder T E, Chang M-C, Chang P, Chao Y, Chen K-F, Cheon B G, Chistov R, Choi S-K, Choi Y, Choi Y K, Chu P H, Chuvikov A, Danilov M, Dong L Y, Drutskoy A, Eidelman S, Eiges V, Fukunaga C, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Hara T, Hayashii H, Hazumi M, Hokuue T, Hoshi Y, Hou W-S, Huang H-C, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki M, Iwasaki Y, Kang J H, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim H J, Kim Hyunwoo, Kim J H, Kim S K, Kinoshita K, Koppenburg P, Korpar S, Krizan P, Krokovny P, Kuzmin A, Kwon Y-J, Lange J S, Lee S H, Lesiak T, Limosani A, Lin S-W, MacNaughton J, Majumder G, Mandl F, Matsumoto T, Mitaroff W, Miyake H, Miyata H, Nagamine T, Nagasaka Y, Nakano E, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen S L, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park C W, Park H, Parslow N, Piilonen L E, Rozanska M, Sagawa H, Saitoh S, Sakai Y, Sarangi T R, Schneider O, Schwartz A J, Semenov S, Shibuya H, Sidorov V, Singh J B, Soni N, Stanic S, Staric M, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki S Y, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tomura T, Tsuboyama T, Tsukamoto T, Uehara S, Uno S, Varner G, Varvell K E, Wang C H, Wang J G, Watanabe Y, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Yanai H, Ying J, Yuan Y, Yusa Y, Zhang C C, Zhang Z P, Zhilich V, Zontar D
机构信息
Department of Physics, National Taiwan University, Taipei.
出版信息
Phys Rev Lett. 2004 Apr 2;92(13):131801. doi: 10.1103/PhysRevLett.92.131801. Epub 2004 Apr 1.
We report the first observation of a b-->u type charmless baryonic B decay, B+-->pppi(+), as well as b-->s type B0-->ppK0 and B+-->ppK(+) decays. The analysis is based on a 78 fb(-1) data sample recorded on the Upsilon(4S) resonance with the Belle detector at KEKB. We find B(B+-->pppi(+))=(3.06(+0.73)(-0.62)+/-0.37)x10(-6), B(B0-->ppK0)=(1.88(+0.77)(-0.60)+/-0.23)x10(-6), and B(B+-->ppK(+))=(10.3(+3.6+1.3)(-2.8-1.7))x10(-6). We also update B(B+-->ppK+)=(5.66(+0.67)(-0.57)+/-0.62)x10(-6) and present an upper limit on B(B0-->ppK(*0)) at the 90% confidence level. A common feature of the observed decay modes is threshold peaking in baryon pair invariant mass.
我们报告了首次观测到b→u型无粲重子B衰变，即B⁺→ppπ⁺，以及b→s型的B⁰→ppK⁰和B⁺→ppK⁺衰变。该分析基于KEKB上的Belle探测器在Υ(4S)共振处记录的78 fb⁻¹数据样本。我们发现B(B⁺→ppπ⁺)=(3.06(+0.73)(-0.62)±0.37)×10⁻⁶，B(B⁰→ppK⁰)=(1.88(+0.77)(-0.60)±0.23)×10⁻⁶，以及B(B⁺→ppK⁺)=(10.3(+3.6+1.3)(-2.8-1.7))×10⁻⁶。我们还更新了B(B⁺→ppK⁺)=(5.66(+0.67)(-0.57)±0.62)×10⁻⁶，并给出了在90%置信水平下B(B⁰→ppK⁺*)的上限。所观测到的衰变模式的一个共同特征是重子对不变质量中的阈值峰。
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