在\(D^0 \to K_S \pi^+ \pi^-\)衰变中测量\(D^0 - D^0\)混合参数。
Measurement of D0-D0 mixing parameters in D0 --> Ks pi+ pi- decays.
作者信息
Zhang L M, Zhang Z P, Adachi I, Aihara H, Aulchenko V, Aushev T, Bakich A M, Balagura V, Barberio E, Bay A, Belous K, Bitenc U, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder T E, Chang P, Chao Y, Chen A, Chen K-F, Chen W T, Cheon B G, Chiang C-C, Cho I-S, Choi Y, Choi Y K, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Epifanov D, Fratina S, Gabyshev N, Gokhroo G, Golob B, Ha H, Haba J, Hara T, Hastings N C, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou W-S, Hsiung Y B, Hyun H J, Iijima T, Ikado K, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Joshi N J, Kah D H, Kaji H, Kajiwara S, Kang J H, Kawai H, Kawasaki T, Kichimi H, Kim H J, Kim H O, Kim S K, Kim Y J, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo C C, Kuzmin A, Kwon Y-J, Lee J S, Lee M J, Lee S E, Lesiak T, Li J, Limosani A, Lin S-W, Liu Y, Liventsev D, Matsumoto T, Matyja A, McOnie S, Medvedeva T, Mitaroff W, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Nagasaka Y, Nakamura I, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen S L, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Pakhlova G, Park C W, Park H, Peak L S, Pestotnik R, Piilonen L E, Poluektov A, Sahoo H, Sakai Y, Schneider O, Schümann J, Schwanda C, Schwartz A J, Seidl R, Senyo K, Sevior M E, Shapkin M, Shibuya H, Shinomiya S, Shiu J-G, Shwartz B, Singh J B, Sokolov A, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Sumisawa K, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor G N, Teramoto Y, Tian X C, Tikhomirov I, Tsuboyama T, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Vervink K, Villa S, Vinokurova A, Wang C H, Wang M-Z, Wang P, Watanabe Y, Won E, Yabsley B D, Yamaguchi A, Yamashita Y, Yamauchi M, Yuan C Z, Zhang C C, Zhilich V, Zupanc A
机构信息
University of Science and Technology of China, Hefei.
出版信息
Phys Rev Lett. 2007 Sep 28;99(13):131803. doi: 10.1103/PhysRevLett.99.131803.
We report a measurement of D0-D(0) mixing parameters in D(0) --> K(s)(0) pi(+) pi(-) decays using a time-dependent Dalitz-plot analysis. We first assume CP conservation and subsequently allow for CP violation. The results are based on 540 fb(-1) of data accumulated with the Belle detector at the KEKB e(+)e(-) collider. Assuming negligible CP violation, we measure the mixing parameters x = (0.80 +/- 0.29(-0.07-0.14)(+0.09+0.10))% and y = (0.33+/-0.24(-0.12-0.08)(+0.08+0.06))%, where the errors are statistical, experimental systematic, and systematic due to the Dalitz decay model, respectively. Allowing for CP violation, we obtain the CP-violating parameters |q / p| = 0.86(-0.29-0.03)(+0.30+0.06) +/- 0.08 and arg(q/p) = (-14(-18-3-4)(+16+5+2)) degrees .
我们报告了一项利用含时Dalitz图分析对(D^0\to K^0_S\pi^+\pi^-)衰变中(D^0-\overline{D^0})混合参数的测量。我们首先假定CP守恒，随后考虑CP破坏。结果基于在KEKB正负电子对撞机上使用Belle探测器积累的540(fb^{-1})数据。假定CP破坏可忽略不计，我们测量得到混合参数(x = (0.80\pm0.29(-0.07 - 0.14)(+0.09 + 0.10))%)以及(y = (0.33\pm0.24(-0.12 - 0.08)(+0.08 + 0.06))%)，其中误差分别为统计误差、实验系统误差以及由Dalitz衰变模型导致的系统误差。考虑CP破坏时，我们得到CP破坏参数(\vert q / p\vert = 0.86(-0.29 - 0.03)(+0.30 + 0.06)\pm0.08)以及(\text{arg}(q/p) = (-14(-18 - 3 - 4)(+16 + 5 + 2))^{\circ}) 。
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