Measurement of the CP-violation parameter sin(2β) in Bd0/(B)over-bard0→J/ψKS0 decays

被引：49

作者：

Abe, F

Akimoto, H

Akopian, A

Albrow, MG

Amadon, A

Amendolia, SR

Amidei, D

Antos, J

Aota, S

Apollinari, G

Arisawa, T

Asakawa, T

Ashmanskas, W

Atac, M

Azzi-Bacchetta, P

Bacchetta, N

Bagdasarov, S

Bailey, MW

de Barbaro, P

Barbaro-Galtieri, A

Barnes, VE

Barnett, BA

Barone, M

Bauer, G

Baumann, T

Bedeschi, F

Behrends, S

Belforte, S

Bellettini, G

Bellinger, J

Benjamin, D

Bensinger, J

Beretvas, A

Berge, JP

Berryhill, J

Bertolucci, S

Bettelli, S

Bevensee, B

Bhatti, A

Biery, K

Bigongiari, C

Binkley, M

Bisello, D

Blair, RE

Blocker, C

Blusk, S

Bodek, A

Bokhari, W

Bolla, G

Bonushkin, Y

机构：

[1] Argonne Natl Lab, Argonne, IL 60439 USA

[2] Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy

[3] Brandeis Univ, Waltham, MA 02254 USA

[4] Univ Calif Los Angeles, Los Angeles, CA 90024 USA

[5] Univ Chicago, Chicago, IL 60637 USA

[6] Duke Univ, Durham, NC 27708 USA

[7] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[8] Univ Florida, Gainesville, FL 32611 USA

[9] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[10] Univ Geneva, CH-1211 Geneva 4, Switzerland

[11] Harvard Univ, Cambridge, MA 02138 USA

[12] Hiroshima Univ, Higashihiroshima 724, Japan

[13] Univ Illinois, Urbana, IL 61801 USA

[14] McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada

[15] Univ Toronto, Toronto, ON M5S 1A7, Canada

[16] Johns Hopkins Univ, Baltimore, MD 21218 USA

[17] Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany

[18] Natl Lab High Energy Phys, KEK, Tsukuba, Ibaraki 305, Japan

[19] Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[20] MIT, Cambridge, MA 02139 USA

[21] Univ Michigan, Ann Arbor, MI 48109 USA

[22] Michigan State Univ, E Lansing, MI 48824 USA

[23] Univ New Mexico, Albuquerque, NM 87131 USA

[24] Ohio State Univ, Columbus, OH 43210 USA

[25] Osaka City Univ, Osaka 588, Japan

[26] Univ Padua, Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy

[27] Univ Penn, Philadelphia, PA 19104 USA

[28] Univ Pisa, Ist Nazl Fis Nucl, I-56100 Pisa, Italy

[29] Scuola Normale Super Pisa, I-56100 Pisa, Italy

[30] Univ Pittsburgh, Pittsburgh, PA 15260 USA

[31] Purdue Univ, W Lafayette, IN 47907 USA

[32] Univ Rochester, Rochester, NY 14627 USA

[33] Rockefeller Univ, New York, NY 10021 USA

[34] Rutgers State Univ, Piscataway, NJ 08855 USA

[35] Acad Sinica, Taipei 11530, Taiwan

[36] Texas A&M Univ, College Stn, TX 77843 USA

[37] Texas Tech Univ, Lubbock, TX 79409 USA

[38] Univ Trieste, Ist Nazl Fis Nucl, Udine, Italy

[39] Univ Tsukuba, Tokyo, Ibaraki 315, Japan

[40] Tufts Univ, Medford, MA 02155 USA

[41] Waseda Univ, Tokyo 169, Japan

[42] Univ Wisconsin, Madison, WI 53706 USA

[43] Yale Univ, New Haven, CT 06520 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.81.5513

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a measurement of the time-dependent asymmetry in the rate for (B)over-bar(d)(0) versus B-d(0) decays to J/psi K-S(0). A nonzero asymmetry would be an indication of CP violation, and within the standard model this may be used to measure the CP-violation parameter sin(2 beta). A total of 198 +/- 17 B-d(0)/(B)over-bar(d)(0) decays were observed in p(p)over-bar collisions at root s = 1.8 TeV by the CDF detector at the Fermilab Tevatron. B-d(0) and (B)over-bar(d)(0) are distinguished by a technique based on charge correlations from hadronization of the b quark. Our analysis results in sin(2 beta) = 1.8 +/- 1.1 (stat) +/- 0.3(syst).

引用

页码：5513 / 5518

页数：6

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