Nakahama Y, Sumisawa K, Adachi I, Aihara H, Aushev T, Bakich A M, Balagura V, Barberio E, Bedny I, Belous K, Bitenc U, Bondar A, Bozek A, Bracko M, Browder T E, Chang P, Chao Y, Chen A, Chen K-F, Chen W T, Cheon B G, Chistov R, Cho I-S, Choi Y, Dalseno J, Dash M, Drutskoy A, Eidelman S, Gabyshev N, Golob B, Ha H, Haba J, Hara K, Hara T, Hayasaka K, Hazumi M, Heffernan D, Hoshi Y, Hsiung Y B, Hyun H J, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kah D H, Kaji H, Kang J H, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim H J, Kim H O, Kim Y J, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo C C, Kuzmin A, Kwon Y-J, Lee J, Lee J S, Lee M J, Lee S E, Lesiak T, Limosani A, Lin S-W, Liventsev D, Mandl F, McOnie S, Medvedeva T, Mitaroff W, Miyabayashi K, Miyata H, Miyazaki Y, Mizuk R, Moloney G R, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okuno S, Olsen S L, Ozaki H, Pakhlov P, Pakhlova G, Park C W, Park H, Park K S, Pestotnik R, Piilonen L E, Sahoo H, Sakai Y, Schneider O, Schwanda C, Schwartz A J, Seidl R, Sevior M E, Shapkin M, Shen C P, Shibuya H, Shiu J-G, Shwartz B, Singh J B, Somov A, Stanic S, Staric M, Sumiyoshi T, Tajima O, Takasaki F, Tamura N, Tanaka M, Taylor G N, Teramoto Y, Tikhomirov I, Trabelsi K, Tsuboyama T, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Ushiroda Y, Varner G, Vervink K, Wang C H, Wang P, Wang X L, Watanabe Y, Won E, Yamashita Y, Yusa Y, Zhang Z P, Zupanc A, Zyukova O
Department of Physics, University of Tokyo, Tokyo.
Phys Rev Lett. 2008 Mar 28;100(12):121601. doi: 10.1103/PhysRevLett.100.121601. Epub 2008 Mar 27.
We report a measurement of the CP-violating parameters in B;{0}-->K_{S}{0}K_{S}{0} decays based on a data sample of 657x10{6} BB[over ] pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e;{+}e{-} collider. In this Letter, one neutral B meson is fully reconstructed in the B;{0}-->K_{S}{0}K_{S}{0} decay mode, and the flavor of the accompanying B meson is identified by its decay products. The CP-violating parameters are measured from the asymmetry in the distributions of the proper-time interval between the two B decays: S_K_{S}{0}K_{S}{0}}=-0.38_{-0.77}{+0.69}(stat)+/-0.09(syst) and A_{K_{S}{0}K_{S}{0}}=-0.38+/-0.38(stat)+/-0.05(syst).
我们报告了基于在KEKB非对称能量正负电子对撞机上用Belle探测器在Upsilon(4S)共振处收集的657×10⁶对BB⁻对数据样本，对B⁰→Kₛ⁰Kₛ⁰衰变中CP破坏参数的测量。在本信函中，一个中性B介子在B⁰→Kₛ⁰Kₛ⁰衰变模式中被完全重建，伴随的B介子的味道通过其衰变产物来识别。CP破坏参数是从两个B衰变之间的固有时间间隔分布的不对称性中测量得到的：S_Kₛ⁰Kₛ⁰ = -0.38₋₀.₇₇⁺₀.₆₉(统计)+/-0.09(系统)，A_Kₛ⁰Kₛ⁰ = -0.38+/-0.38(统计)+/-0.05(系统)。
