Improved constraints on D0-(D)over-bar0 mixing in D0 → K+ π- decays from the Belle detector -: art. no. 151801

被引：75

作者：

Zhang, LM ^{[1
]}

Zhang, ZP

Li, J

Abe, K

Adachi, I

Aihara, H

Anipko, D

Arinstein, K

Asano, Y

Aushev, T

Bahinipati, S

Bakich, AM

Balagura, V

Barbero, M

Bay, A

Bedny, I

Belous, K

Bitenc, U

Bizjak, I

Blyth, S

Bondar, A

Bozek, A

Bracko, M

Brodzicka, J

Browder, TE

Chang, MC

Chang, P

Chao, Y

Chen, A

Chen, WT

Cheon, BG

Chistov, R

Choi, SK

Choi, Y

Choi, YK

Chuvikov, A

Cole, S

Dalseno, J

Danilov, M

Dash, M

Drutskoy, A

Eidelman, S

Gabyshev, N

Gershon, T

Go, A

Gokhroo, G

Golob, B

Gorisek, A

Ha, HC

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] Chonnam Natl Univ, Kwangju, South Korea

[5] Univ Cincinnati, Cincinnati, OH 45221 USA

[6] Gyeongsang Natl Univ, Chinju, South Korea

[7] Univ Hawaii, Honolulu, HI 96822 USA

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

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

[10] Inst High Energy Phys, Vienna, Austria

[11] Inst High Energy Phys, Protvino, Russia

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

[13] Jozef Stefan Inst, Ljubljana, Slovenia

[14] Kanagawa Univ, Yokohama, Kanagawa, Japan

[15] Korea Univ, Seoul 136701, South Korea

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

[17] Swiss Fed Inst Technol, EPFL, CH-1015 Lausanne, Switzerland

[18] Univ Ljubljana, Ljubljana 61000, Slovenia

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

[20] Univ Melbourne, Parkville, Vic 3052, Australia

[21] Nagoya Univ, Nagoya, Aichi, Japan

[22] Nara Womens Univ, Nara 630, Japan

[23] Natl Cent Univ, Chungli 32054, Taiwan

[24] Natl United Univ, Miaoli, Taiwan

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

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

[27] Niigata Univ, Niigata 95021, Japan

[28] Nova Gorica Polytech, Nova Gorica, Slovenia

[29] Osaka City Univ, Osaka 558, Japan

[30] Osaka Univ, Osaka, Japan

[31] Panjab Univ, Chandigarh 160014, India

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

[33] Princeton Univ, Princeton, NJ 08544 USA

[34] RIKEN, BNL Res Ctr, Upton, NY 11973 USA

[35] Saga Univ, Saga 840, Japan

[36] Seoul Natl Univ, Seoul 151, South Korea

[37] Shinshu Univ, Nagano, Japan

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

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

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

[41] Tohoku Univ, Tagajo, Miyagi, Japan

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

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

[44] Tokyo Inst Technol, Tokyo 152, Japan

[45] Tokyo Metropolitan Univ, Tokyo 158, Japan

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

[47] Univ Tsukuba, Tsukuba, Ibaraki 305, Japan

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

[49] Yonsei Univ, Seoul 120749, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.96.151801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the results of a search for D-0-D-0 mixing in D-0-> K(+)pi(-) decays based on 400 fb(-1) of data accumulated by the Belle detector at KEKB. Both assuming CP conservation and allowing for CP violation, we fit the decay-time distribution for the mixing parameters x(') and y('), as well as for the parameter R-D, the ratio of doubly Cabibbo-suppressed decays to Cabibbo-favored decays. The 95% confidence level region in the (x('2),y(')) plane is obtained using a frequentist method. Assuming CP conservation, we find x('2)< 0.72x10(-3) and -9.9x10(-3)< y(')< 6.8x10(-3) at the 95% confidence level; these are the most stringent constraints on the mixing parameters to date. The no-mixing point (0,0) has a confidence level of 3.9%. Assuming no mixing, we measure R-D=(0.377 +/- 0.008 +/- 0.005)%.

引用

页码：1 / 4

页数：6

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