Kaneko J, Abe K, Abe K, Abe T, Adachi I, Ahn Byoung Sup, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich A M, Ban Y, Banas E, Bartel W, Bay A, Behera P K, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder T E, Casey B C K, Chang P, Chao Y, Chen K-F, Cheon B G, Chistov R, Choi Y, Choi Y K, Danilov M, Dong L Y, Eidelman S, Eiges V, Enari Y, Everton C W, Fang F, Fujii H, Fukunaga C, Gabyshev N, Garmash A, Gershon T, Guo R, Haba J, Handa F, Hara T, Harada Y, Hastings N C, Hayashii H, Hazumi M, Heenan E M, Higuchi I, Higuchi T, Hinz L, Hojo T, Hoshi Y, Hou W-S, Huang H-C, Igaki T, Igarashi Y, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki H, Iwasaki Y, Jang H K, Kang J H, Kang J S, Katayama N, Kawai H, Kawakami Y, Kawamura N, Kawasaki T, Kichimi H, Kim D W, Kim Heejong, Kim H J, Kim H O, Kim Hyunwoo, Kim S K, Kinoshita K, Kobayashi S, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar S, Kwon Y-J, Lange J S, Leder G, Lee S H, Li J, Limosani A, Lu R-S, MacNaughton J, Majumder G, Mandl F, Marlow D, Matsumoto S, Matsumoto T, Mitaroff W, Miyabayashi K, Miyabayashi Y, Miyake H, Moloney G R, Mori T, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Nam J W, Neichi K, 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, Perroud J-P, Peters M, Piilonen L E, Root N, Rybicki K, Sagawa H, Sakai Y, Sakamoto H, Satapathy M, Satpathy A, Schneider O, Schrenk S, Schwanda C, Semenov S, Senyo K, Seuster R, Shibuya H, Shwartz B, Sidorov V, Singh J B, Soni N, Stanic S, Sumisawa K, Sumiyoshi T, Suzuki K, Suzuki S, Suzuki S Y, Swain S K, Tajima H, Takahashi T, Takasaki F, Tamai K, Tamura N, Tanaka J, Tanaka M, Taylor G N, Teramoto Y, Tokuda S, Tomoto M, Tomura T, Trabelsi K, Trischuk W, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Uno S, Ushiroda Y, 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, Yamauchi M, Yanai H, Yashima J, Yokoyama M, Yuan Y, Yusa Y, Zhang C C, Zhang J, Zhang Z P, Zheng Y, Zhilich V, Zontar D
Tokyo Institute of Technology, Tokyo.
Phys Rev Lett. 2003 Jan 17;90(2):021801. doi: 10.1103/PhysRevLett.90.021801. Epub 2003 Jan 16.
We report the first measurement of the branching fraction for the inclusive decay B-->X(s)l(+)l(-), where l is either an electron or a muon, and X(s) is a hadronic recoil system that contains an s quark. We analyzed a data sample of 65.4 x 10(6) B meson pairs collected with the Belle detector at the KEKB e(+)e(-) asymmetric-energy collider. We find B(B-->X(s)l(+)l(-))=[6.1 +/-1.4(stat) +1.4-1.1(syst)] x 10(-6) for dilepton masses greater than 0.2 GeV/c(2).
我们报告了对包含性衰变B→X(s)l⁺l⁻分支比的首次测量，其中l为电子或μ子，X(s)是一个包含s夸克的强子反冲系统。我们分析了在KEKB正负电子非对称能量对撞机上用Belle探测器收集的65.4×10⁶个B介子对的数据样本。对于双轻子质量大于0.2 GeV/c²的情况，我们发现B(B→X(s)l⁺l⁻)=[6.1±1.4(统计)+1.4 - 1.1(系统)]×10⁻⁶ 。
