Search for the Flavor-Changing Neutral-Current Decay t→Zq in pp Collisions at s=1.96 TeV

被引：52

作者：

Aaltonen, T. ^{[26
,27
]}

Adelman, J. ^{[15
]}

Akimoto, T. ^{[68
]}

Albrow, M. G. ^{[20
]}

Alvarez Gonzalez, B. ^{[13
]}

Amerio, S. ^{[53
]}

Amidei, D. ^{[43
]}

Anastassov, A. ^{[47
]}

Annovi, A. ^{[22
]}

Antos, J. ^{[16
,17
]}

Apollinari, G. ^{[20
]}

Apresyan, A. ^{[60
]}

Arisawa, T. ^{[70
]}

Artikov, A. ^{[18
]}

Ashmanskas, W. ^{[20
]}

Attal, A. ^{[4
]}

Aurisano, A. ^{[65
]}

Azfar, F. ^{[51
]}

Azzurri, P. ^{[58
]}

Badgett, W. ^{[20
]}

Barbaro-Galtieri, A. ^{[36
]}

Barnes, V. E. ^{[60
]}

Barnett, B. A. ^{[29
]}

Bartsch, V. ^{[38
]}

Bauer, G. ^{[40
]}

Beauchemin, P. -H. ^{[41
,42
]}

Bedeschi, F. ^{[56
]}

Bednar, P. ^{[16
,17
]}

Beecher, D. ^{[38
]}

Behari, S. ^{[29
]}

Bellettini, G.

Bellinger, J. ^{[72
]}

Benjamin, D. ^{[19
]}

Beretvas, A. ^{[20
]}

Beringer, J. ^{[36
]}

Bhatti, A.

Binkley, M. ^{[20
]}

Bisello, D. ^{[53
]}

Bizjak, I. ^{[38
]}

Blair, R. E.

Blocker, C. ^{[8
]}

Blumenfeld, B. ^{[29
]}

Bocci, A. ^{[19
]}

Bodek, A. ^{[61
]}

Boisvert, V. ^{[61
]}

Bolla, G. ^{[60
]}

Bortoletto, D. ^{[60
]}

Boudreau, J. ^{[59
]}

Boveia, A. ^{[12
]}

Brau, B. ^{[12
]}

机构：

[1] Acad Sinica, Inst Phys, Taipei 11529, Taiwan

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

[3] Univ Athens, GR-15771 Athens, Greece

[4] Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain

[5] Baylor Univ, Waco, TX 76798 USA

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

[7] Univ Bologna, I-40127 Bologna, Italy

[8] Brandeis Univ, Waltham, MA 02254 USA

[9] Univ Calif Davis, Davis, CA 95616 USA

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

[11] Univ Calif San Diego, La Jolla, CA 92093 USA

[12] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA

[13] Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain

[14] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[15] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[16] Comenius Univ, Bratislava 84248, Slovakia

[17] Inst Expt Phys, Kosice 04001, Slovakia

[18] Joint Inst Nucl Res, RU-141980 Dubna, Russia

[19] Duke Univ, Durham, NC 27708 USA

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

[21] Univ Florida, Gainesville, FL 32611 USA

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

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

[24] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland

[25] Harvard Univ, Cambridge, MA 02138 USA

[26] Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland

[27] Helsinki Inst Phys, FIN-00014 Helsinki, Finland

[28] Univ Illinois, Urbana, IL 61801 USA

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

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

[31] Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea

[32] Seoul Natl Univ, Seoul 151742, South Korea

[33] Sungkyunkwan Univ, Suwon 440746, South Korea

[34] Korea Inst Sci & Technol Informat, Taejon 305806, South Korea

[35] Chonnam Natl Univ, Kwangju 500757, South Korea

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

[37] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England

[38] UCL, London WC1E 6BT, England

[39] CIEMAT, E-28040 Madrid, Spain

[40] MIT, Cambridge, MA 02139 USA

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

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

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

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

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

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

[47] Northwestern Univ, Evanston, IL 60208 USA

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

[49] Okayama Univ, Okayama 7008530, Japan

[50] Osaka City Univ, Osaka 588, Japan

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 19期

基金：

英国科学技术设施理事会; 瑞士国家科学基金会; 芬兰科学院; 俄罗斯基础研究基金会; 美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.101.192002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a search for the flavor-changing neutral-current decay of the top quark t -> Zq (q=u, c) in pp<collisions at s=1.96 TeV using a data sample corresponding to an integrated luminosity of 1.9 fb(-1) collected by the CDF II detector. This decay is strongly suppressed in the standard model and an observation of a signal at the Fermilab Tevatron would be an indication of physics beyond the standard model. Using Z+>= 4 jet final state candidate events, with and without an identified bottom quark jet, we obtain an upper limit of B(t -> Zq)< 3.7% at 95% C.L.

引用

页数：7

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