Measurement of D0-(D)over-bar0 mixing parameters in D0→Ksπ+π- decays

被引：66

作者：

Zhang, L. M. ^{[1
]}

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.

机构：

[1] Univ Sci & Technol China, Hefei 230026, Peoples R China

[2] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[3] Chiba Univ, Chiba, Japan

[4] Univ Cincinnati, Cincinnati, OH 45221 USA

[5] Hanyang Univ, Seoul 133791, South Korea

[6] Univ Hawaii, Honolulu, HI 96822 USA

[7] High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki, Japan

[8] Hiroshima Inst Technol, Hiroshima, Japan

[9] Univ Illinois, Urbana, IL 61801 USA

[10] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China

[11] Inst High Energy Phys, Vienna, Austria

[12] Inst High Energy Phys, Protvino, Russia

[13] Inst Theoret & Expt Phys, Moscow 117259, Russia

[14] Jozef Stefan Inst, Ljubljana, Slovenia

[15] Kanagawa Univ, Yokohama, Kanagawa, Japan

[16] Korea Univ, Seoul 136701, South Korea

[17] Kyungpook Natl Univ, Taegu 702701, South Korea

[18] Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, CH-1015 Lausanne, Switzerland

[19] Univ Ljubljana, Ljubljana, Slovenia

[20] Univ Maribor, SLO-2000 Maribor, Slovenia

[21] Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia

[22] Nagoya Univ, Nagoya, Aichi, Japan

[23] Nara Womens Univ, Nara 630, Japan

[24] Natl Cent Univ, Chungli 32054, Taiwan

[25] Natl United Univ, Miaoli, Taiwan

[26] Natl Taiwan Univ, Dept Phys, Taipei 10764, Taiwan

[27] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland

[28] Nippon Dent Univ, Niigata, Japan

[29] Niigata Univ, Niigata, Japan

[30] Univ Nova Gorica, Nova Gorica, Slovenia

[31] Osaka City Univ, Osaka 558, Japan

[32] Osaka Univ, Osaka, Japan

[33] Panjab Univ, Chandigarh 160014, India

[34] Peking Univ, Beijing 100871, Peoples R China

[35] Brookhaven Natl Lab, Res Ctr, RIKEN, Upton, NY 11973 USA

[36] Saga Univ, Saga 840, Japan

[37] Univ Sci & Technol China, Hefei 230026, Peoples R China

[38] Seoul Natl Univ, Seoul, South Korea

[39] Sungkyunkwan Univ, Suwon, South Korea

[40] Univ Sydney, Sydney, NSW 2006, Australia

[41] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

[42] Toho Univ, Funabashi, Chiba 274, Japan

[43] Tohoku Gakuin Univ, Tagajo, Miyagi, Japan

[44] Tohoku Univ, Sendai, Miyagi 980, Japan

[45] Univ Tokyo, Dept Phys, Tokyo 113, Japan

[46] Tokyo Inst Technol, Tokyo 152, Japan

[47] Tokyo Metropolitan Univ, Tokyo 158, Japan

[48] Tokyo Univ Agr & Technol, Tokyo, Japan

[49] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA

[50] Yonsei Univ, Seoul 120749, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.99.131803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a measurement of D-0-(D) over bar (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.

引用

页数：6

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