对B⁺→ψ(3770)K⁺的观测
Observation of B+-->psi(3770)K+.
作者信息
Chistov R, Abe K, Abe K, Abe T, Aihara H, Akatsu M, Asano Y, Aushev T, Bakich A M, Ban Y, Banerjee S, Bay A, Bedny I, Bizjak I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder T E, Chao Y, Chen K-F, Cheon B G, Choi Y, Choi Y K, Danilov M, Dash M, Dong L Y, Drutskoy A, Eidelman S, Eiges V, Epifanov D, Gabyshev N, Garmash A, Gershon T, Golob B, Guo R, Haba J, Hara T, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou W-S, Huang H-C, Iijima T, Inami K, Ishikawa A, Iwasaki H, Iwasaki M, Kagan R, Kang J H, Kang J S, Kapusta P, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim S K, Kinoshita K, Koppenburg P, Korpar S, Krizan P, Krokovny P, Kumar S, Kuzmin A, Kwon Y-J, Lange J S, Lesiak T, Li J, Limosani A, Lin S-W, Liventsev D, MacNaughton J, Majumder G, Mandl F, Marlow D, Matsumoto H, Matsumoto T, Matyja A, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mohapatra D, Moloney G R, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Nishida S, Nitoh O, Noguchi S, Ogawa S, Ohshima T, Okuno S, Olsen S L, Ozaki H, Pakhlov P, Palka H, Park H, Parslow N, Piilonen L E, Sagawa H, Sakai Y, Sarangi T R, Schneider O, Schwartz A J, Semenov S, Sevior M E, Shwartz B, Sidorov V, Stamen R, Stanic S, Staric M, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tomura T, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Varner G, Wang C C, Wang C H, Wang M-Z, Yabsley B D, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Zhang C C, Zhang Z P, Zhilich V, Zontar D, Zürcher D
机构信息
Institute for Theoretical and Experimental Physics, Moscow.
出版信息
Phys Rev Lett. 2004 Jul 30;93(5):051803. doi: 10.1103/PhysRevLett.93.051803. Epub 2004 Jul 29.
We report the first observation of the decay B+-->psi(3770)K+ where the psi(3770) is reconstructed in the D0(-)D(0) and D+D- decay channels. The obtained branching fraction is B(B+-->psi(3770)K+)=(0.48+/-0.11+/-0.07)x10(-3). We have measured the branching fraction for the decay B+-->D0(-)D0K+ to be (1.17+/-0.21+/-0.15)x10(-3) and set a 90% confidence level upper limit of 0.90 x 10(-3) for the decay B+-->D+D-K+. We also present the results of a search for possible decays to D(-)D and D0(-)D(0)pi(0) of the recently observed X(3872) particle. The analysis is based on 88 fb(-1) of data collected at the Upsilon(4S) resonance by the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.
我们报告了对衰变B⁺→ψ(3770)K⁺的首次观测，其中ψ(3770)通过D⁰⁻D⁰和D⁺D⁻衰变道进行重建。得到的分支比为B(B⁺→ψ(3770)K⁺) = (0.48±0.11±0.07)×10⁻³。我们测量了衰变B⁺→D⁰⁻D⁰K⁺的分支比为(1.17±0.21±0.15)×10⁻³，并对衰变B⁺→D⁺D⁻K⁺设定了90%置信水平上限为0.90×10⁻³。我们还给出了对最近观测到的X(3872)粒子可能衰变为D⁻D和D⁰⁻D⁰π⁰的搜索结果。该分析基于KEKB非对称能量e⁺e⁻对撞机上Belle探测器在Υ(4S)共振处收集的88 fb⁻¹数据。
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