Search for Leptoquarks and FCNC in e+e- annihilations √s = 183 GeV

被引：41

作者：

Abreu, P

Adam, W

Adye, T

Adzic, P

Aldeweireld, T

Alekseev, GD

Alemany, R

Allmendinger, T

Allport, PP

Almehed, S

Amaldi, U

Amato, S

Anassontzis, EG

Andersson, P

Andreazza, A

Andringa, S

Antilogus, P

Apel, WD

Arnoud, Y

Åsman, B

Augustin, JE

Augustinus, A

Baillon, P

Bambade, P

Barao, F

Barbiellini, G

Barbier, R

Bardin, DY

Barker, G

Baroncelli, A

Battaglia, M

Baubillier, M

Becks, KH

Begalli, M

Beilliere, P

Belokopytov, Y

Benvenuti, AC

Berat, C

Berggren, M

Bertini, D

Bertrand, D

Besancon, M

Bianchi, F

Bigi, M

Bilenky, MS

Bizouard, MA

Bloch, D

Blom, HM

Bonesini, M

Bonivento, W

机构：

[1] Univ Fed Rio de Janeiro, BR-21945970 Rio De Janeiro, Brazil

[2] FCUL, IST, LIP, PT-1000 Lisbon, Portugal

[3] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[4] Univ Instelling Antwerp, Dept Phys, BE-2610 Wilrijk, Belgium

[5] ULB, VLB, IIHE, BE-1050 Brussels, Belgium

[6] Univ Etat Mons, Fac Sci, BE-7000 Mons, Belgium

[7] Univ Athens, Phys Lab, GR-10680 Athens, Greece

[8] Univ Bergen, Dept Phys, NO-5007 Bergen, Norway

[9] Univ Bologna, Dipartimento Fis, IT-40126 Bologna, Italy

[10] Ist Nazl Fis Nucl, IT-40126 Bologna, Italy

[11] Ctr Brasileiro Pesquisas Fis, BR-22290 Rio De Janeiro, Brazil

[12] Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22453 Rio De Janeiro, Brazil

[13] Univ Estadual Rio de Janeiro, Inst Fis, Rio De Janeiro, Brazil

[14] Comenius Univ, Fac Math & Phys, SK-84215 Bratislava, Slovakia

[15] Coll France, IN2P3, CNRS, Lab Phys Corpusculaire, FR-75231 Paris 05, France

[16] CERN, CH-1211 Geneva 23, Switzerland

[17] ULP, IN2P3, CNRS, Inst Rech Subatom, FR-67037 Strasbourg, France

[18] NCSR Demokritos, Inst Nucl Phys, GR-15310 Athens, Greece

[19] CAS, Inst Phys, FZU, Div High Energy Phys, CZ-18040 Prague 8, Czech Republic

[20] Univ Genoa, Dipartimento Fis, IT-16146 Genoa, Italy

[21] Ist Nazl Fis Nucl, IT-16146 Genoa, Italy

[22] Univ Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, FR-38026 Grenoble, France

[23] Helsinki Inst Phys, FI-00014 Helsinki, Finland

[24] Joint Inst Nucl Res Dubna, RU-101000 Moscow, Russia

[25] Univ Karlsruhe, Inst Expt Kernphys, DE-76128 Karlsruhe, Germany

[26] Inst Nucl Phys, PL-30055 Krakow, Poland

[27] Univ Min & Met, PL-30055 Krakow, Poland

[28] Univ Paris Sud, Accelerateur Lineaire Lab, IN2P3, CNRS, FR-91405 Orsay, France

[29] Univ Lancaster, Sch Phys & Mat, Lancaster LA1 4YB, England

[30] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England

[31] Univ Paris 06, CNRS, IN2P3, LPNHE, FR-75252 Paris 05, France

[32] Univ Paris 07, CNRS, IN2P3, LPNHE, FR-75252 Paris 05, France

[33] Univ Lund, Dept Phys, SE-22363 Lund, Sweden

[34] Univ Lyon 1, CNRS, IPNL, IN2P3, FR-69622 Villeurbanne, France

[35] Univ Aix Marseille 1, CPP, CNRS, IN2P3, FR-13288 Marseille 09, France

[36] Univ Milan, Dipartimento Fis, IT-20133 Milan, Italy

[37] Ist Nazl Fis Nucl, IT-20133 Milan, Italy

[38] Niels Bohr Inst, DK-2100 Copenhagen O, Denmark

[39] Charles Univ, MFF, Nucl Ctr, CZ-18000 Prague 8, Czech Republic

[40] NIKHEF H, NL-1009 DB Amsterdam, Netherlands

[41] Natl Tech Univ Athens, Dept Phys, GR-15773 Zografos, Greece

[42] Univ Oslo, Dept Phys, NO-1000 Oslo 3, Norway

[43] Univ Oviedo, Dept Fis, ES-33007 Oviedo, Spain

[44] Univ Oxford, Dept Phys, Oxford OX1 3RH, England

[45] Univ Padua, Dipartimento Fis, IT-35131 Padua, Italy

[46] Ist Nazl Fis Nucl, IT-35131 Padua, Italy

[47] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[48] Univ Rome 2, Dipartimento Fis, IT-00173 Rome, Italy

[49] Ist Nazl Fis Nucl, IT-00173 Rome, Italy

[50] Univ Rome 3, Dipartimento Fis, IT-00146 Rome, Italy

来源：

PHYSICS LETTERS B | 1999年 / 446卷 / 01期

关键词：

D O I：

10.1016/S0370-2693(98)01525-1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A search fur events with one jet and at most one isolated lepton used data taken at LEP-2 by the DELPHI detector. These data were accumulated at a center-of-mass energy of 183 GeV and correspond to an integrated luminosity of 47.7 pb(-1) Production of single scalar and vector leptoquarks was searched for. Limits at 95% confidence level were derived on the masses (ranging from 134GcV/c(2) to 171GeV/c(2) for electromagnetic type couplings) and couplings of the leptoquark rates. A search for top-charm flavour changing neutral currents (e(+)e(-) --> (t) over bar c or charge conjugate) used the semileptonic decay channel. A limit on the flavour changing cross-section via neutral currents was set at 0.55pb (95%: confidence level). (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：62 / 74

页数：13

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