Search for D0-D-0 mixing in D0→K+π- decays and measurement of the doubly-Cabibbo-suppressed decay rate -: art. no. 071801

被引：6

作者：

Li, J ^{[1
]}

Zhang, ZP

Schwartz, AJ

Abe, K

Aihara, H

Akatsu, M

Asano, Y

Aushev, T

Bakich, AM

Bay, A

Bedny, I

Bitenc, U

Bizjak, I

Bondar, A

Bozek, A

Bracko, M

Brodzicka, J

Browder, TE

Chao, Y

Chen, A

Chen, KF

Chen, WT

Cheon, BG

Chistov, R

Choi, SK

Choi, Y

Chuvikov, A

Cole, S

Dalseno, J

Danilov, M

Dash, M

Dong, LY

Drutskoy, A

Eidelman, S

Eiges, V

Enari, Y

Fang, F

Fratina, S

Gabyshev, N

Garmash, A

Gershon, T

Gokhroo, G

Haba, J

Hayasaka, K

Hayashii, H

Hazumi, M

Higuchi, T

Hokuue, T

Hoshi, H

机构：

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

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

[3] Chiba Univ, Chiba, Japan

[4] Chonnan Natl Univ, Kwangju, South Korea

[5] Univ Cincinnati, Cincinnati, OH 45221 USA

[6] Goethe Univ Frankfurt, D-6000 Frankfurt, Germany

[7] Gyeongsang Natl Univ, Chinju, South Korea

[8] Univ Hawaii, Honolulu, HI 96822 USA

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

[10] Hiroshima Inst Technol, Hiroshima, Japan

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

[12] Inst High Energy, Vienna, Austria

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

[14] J Stefan Inst, Ljubljana, Slovenia

[15] Korea Univ, Seoul, South Korea

[16] Kyungpook Natl Univ, Taegu, South Korea

[17] Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol Lausanne, Lausanne, Switzerland

[18] Univ Ljubljana, Ljubljana, 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, Taiwan

[24] Natl Taiwan Univ, Dept Phys, Taipei, Taiwan

[25] H Niewodniczanski Inst Nucl Phys, Krakow, Poland

[26] Nihon Dent Coll, Niigata, Japan

[27] Niigata Univ, Niigata, Japan

[28] Osaka City Univ, Osaka 558, Japan

[29] Peking Univ, Beijing, Peoples R China

[30] Princeton Univ, Princeton, NJ 08544 USA

[31] Univ Sci & Technol, Hefei, Peoples R China

[32] Seoul Natl Univ, Seoul, South Korea

[33] Sungkyunkwan Univ, Suwon, South Korea

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

[35] Tata Inst Fundamental Res, Bombay, Maharashtra, India

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

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

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

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

[40] Tokyo Inst Technol, Tokyo 152, Japan

[41] Tokyo Metropolitan Univ, Tokyo 158, Japan

[42] Tokyo Metropolitan Univ, Tokyo 158, Japan

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

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

[45] Yonsei Univ, Seoul 120749, South Korea

[46] Panjab Univ, Chandigarh 160014, India

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 07期

关键词：

All Open Access; Green;

D O I：

10.1103/PhysRevLett.94.071801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have searched for mixing in the Ddegrees-(D) over cap (0) D-0 system by measuring the decay-time distribution of D0 ! K(+)pi(-) decays. The analysis uses 90 fb(-1) of data collected by the Belle detector at the KEKB e(+) e(-) collider. We fit the decay-time distribution for the mixing parameters x(1) and y(1) and also for the parameter R-D, which is the ratio of the rate for the doubly-Cabibbo-suppressed decay D-0--> K(+)pi(-) to that for the Cabibbo-favored decay D-0 --> K- pi(+). We do these fits both assuming CP conservation and allowing for CP violation. We use a frequentist method to obtain a 95% C. L. region in the x(J2)- y(l) plane. Assuming no mixing, we measure R-D=(0: 381 +/- 0: 017 (+) (0.008)(-0.016))%.

引用

页码：1 / 5

页数：5

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