Search for narrow t(t)over-bar resonances in p(p)over-bar collisions at √s=1.8 TeV -: art. no. 221801

被引：24

作者：

Abazov, VM ^{[1
]}

Abbott, B

Abdesselam, A

Abolins, M

Abramov, V

Acharya, BS

Adams, DL

Adams, M

Ahmed, SN

Alexeev, GD

Alton, A

Alves, GA

Anderson, EW

Arnoud, Y

Avila, C

Babintsev, VV

Babukhadia, L

Bacon, TC

Baden, A

Baffioni, S

Baldin, B

Balm, PW

Banerjee, S

Barberis, E

Baringer, P

Barreto, J

Bartlett, JF

Bassler, U

Bauer, D

Bean, A

Beaudette, F

Begel, M

Belyaev, A

Beri, SB

Bernardi, G

Bertram, I

Besson, A

Beuselinck, R

Bezzubov, VA

Bhat, PC

Bhatnagar, V

Bhattacharjee, M

Blazey, G

Blekman, F

Blessing, S

Boehnlein, A

Bojko, NI

Bolton, TA

Borcherding, F

Bos, K

机构：

[1] Joint Inst Nucl Res, Dubna, Russia

[2] Univ Buenos Aires, Buenos Aires, DF, Argentina

[3] Ctr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, Brazil

[4] Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil

[5] Inst High Energy Phys, Beijing 100039, Peoples R China

[6] Univ Los Andes, Bogota, Colombia

[7] Charles Univ Prague, Ctr Particle Phys, Prague, Czech Republic

[8] Acad Sci, Inst Phys, Ctr Particle Phys, Prague, Czech Republic

[9] Univ San Francisco Quito, Quito, Ecuador

[10] Univ Grenoble 1, Lab Phys Subatom & Cosmol, IN2P3, CNRS, Grenoble, France

[11] Univ Aix Marseille 2, CPPM, IN2P3, CNRS, Marseille, France

[12] IN2P3, CNRS, Lab Accelerateux Lineaire, Orsay, France

[13] Univ Paris 06, LPNHE, IN2P3, CNRS, Paris, France

[14] Univ Paris 07, LPNHE, IN2P3, CNRS, Paris, France

[15] CEA, DAPNIA, Serv Phys Particules, Saclay, France

[16] Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany

[17] Panjab Univ, Chandigarh 160014, India

[18] Univ Delhi, Delhi 110007, India

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

[20] CINVESTAV, Mexico City 14000, DF, Mexico

[21] NIKHEF, FOM Inst, Amsterdam, Netherlands

[22] Univ Amsterdam, NIKHEF, Amsterdam, Netherlands

[23] Univ Nijmegen, NIKHEF, Nijmegen, Netherlands

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

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

[26] Univ Lancaster, Lancaster, England

[27] Univ London Imperial Coll Sci Technol & Med, London, England

[28] Univ Arizona, Tucson, AZ 85721 USA

[29] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

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

[31] Calif State Univ Fresno, Fresno, CA 93740 USA

[32] Univ Calif Irvine, Irvine, CA 92697 USA

[33] Univ Calif Riverside, Riverside, CA 92521 USA

[34] Florida State Univ, Tallahassee, FL 32306 USA

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

[36] Univ Illinois, Chicago, IL 60607 USA

[37] No Illinois Univ, De Kalb, IL 60115 USA

[38] Northwestern Univ, Evanston, IL 60208 USA

[39] Indiana Univ, Bloomington, IN 47405 USA

[40] Univ Notre Dame, Notre Dame, IN 46556 USA

[41] Iowa State Univ Sci & Technol, Ames, IA 50011 USA

[42] Kansas State Univ, Manhattan, KS 66506 USA

[43] Louisiana Tech Univ, Ruston, LA 71272 USA

[44] Univ Maryland, College Pk, MD 20742 USA

[45] Boston Univ, Boston, MA 02215 USA

[46] Northeastern Univ, Boston, MA 02115 USA

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

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

[49] Univ Nebraska, Lincoln, NE 68588 USA

[50] Columbia Univ, New York, NY 10027 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 22期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.92.221801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A search for narrow resonances that decay into t (t) over bar pairs has been performed using 130 pb(-1) of data in the lepton + jets channel collected by the DO detector in p (p) over bar collisions at roots=1.8 TeV. There is no significant deviation observed from the standard-model predictions at a top-quark mass of 175 GeV/c(2). We therefore present upper limits at the 95% confidence level on the product of the production cross section and branching fraction to t (t) over bar for narrow resonances as a function of the resonance mass M-X. These limits are used to exclude the existence of a leptophobic top-color particle with mass M-X<560 GeV/c(2), using a theoretical cross section for a width Gamma(X)=0.012M(X).

引用

页码：221801 / 1

页数：6

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