SEARCH FOR A SCALAR TOP-QUARK USING THE OPAL DETECTOR

被引：24

作者：

AKERS, R

ALEXANDER, G

ALLISON, J

ANDERSON, KJ

ARCELLI, S

ASAI, S

ASTBURY, A

AXEN, D

AZUELOS, G

BALL, AH

BARBERIO, E

BARLOW, RJ

BARTOLDUS, R

BATLEY, JR

BEAUDOIN, G

BECK, A

BECK, GA

BECKER, J

BEESTON, C

BEHNKE, T

BELL, KW

BELLA, G

BENTKOWSKI, P

BENTVELSEN, S

BERLICH, P

BETHKE, S

BIEBEL, O

BLOODWORTH, IJ

BOCK, P

BOSCH, HM

BOUTEMEUR, M

BRAIBANT, S

BRIGHTTHOMAS, P

BROWN, RM

BUIJS, A

BURCKHART, HJ

BURGARD, C

CAPILUPPI, P

CARNEGIE, RK

CARTER, AA

CARTER, JR

CHANG, CY

CHARLESWORTH, C

CHARLTON, DG

CHU, SL

CLARKE, PEL

CLAYTON, JC

CLOWES, SG

COHEN, I

CONBOY, JE

机构：

[1] UNIV BOLOGNA,DIPARTMENTO FIS,I-40126 BOLOGNA,ITALY

[2] IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY

[3] UNIV BONN,INST PHYS,D-53115 BONN,GERMANY

[4] UNIV CALIF RIVERSIDE,DEPT PHYS,RIVERSIDE,CA 92521

[5] UNIV CAMBRIDGE,CAVENDISH LAB,CAMBRIDGE CB3 0HE,CAMBS,ENGLAND

[6] CARLETON UNIV,DEPT PHYS,OTTAWA K1S 5B6,ON,CANADA

[7] CARLETON UNIV,CTR RES PARTICLE PHYS,OTTAWA K1S 5B6,ON,CANADA

[8] CERN,EUROPEAN ORG PARTICLE PHYS,CH-1211 GENEVA 23,SWITZERLAND

[9] UNIV CHICAGO,ENRICO FERMI INST,CHICAGO,IL 60637

[10] UNIV CHICAGO,DEPT PHYS,CHICAGO,IL 60637

[11] UNIV FREIBURG,FAK PHYS,D-79104 FREIBURG,GERMANY

[12] UNIV HEIDELBERG,INST PHYS,D-69120 HEIDELBERG,GERMANY

[13] INDIANA UNIV,DEPT PHYS,BLOOMINGTON,IN 47405

[14] UNIV LONDON QUEEN MARY & WESTFIELD COLL,LONDON E1 4NS,ENGLAND

[15] UNIV LONDON BIRKBECK COLL,LONDON WC1E 7HV,ENGLAND

[16] UNIV LONDON UNIV COLL,LONDON WC1E 6BT,ENGLAND

[17] UNIV MANCHESTER,SCHUSTER LAB,DEPT PHYS,MANCHESTER M13 9PL,LANCS,ENGLAND

[18] UNIV MARYLAND,DEPT PHYS,COLLEGE PK,MD 20742

[19] UNIV MONTREAL,PHYS NUCL LAB,MONTREAL H3C 3J7,PQ,CANADA

[20] UNIV OREGON,DEPT PHYS,EUGENE,OR 97403

[21] RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND

[22] CEA SACLAY,DAPNIA SPP,F-91191 GIF SUR YVETTE,FRANCE

[23] TECHNION ISRAEL INST TECHNOL,DEPT PHYS,IL-32000 HAIFA,ISRAEL

[24] TEL AVIV UNIV,DEPT PHYS & ASTRON,IL-69978 TEL AVIV,ISRAEL

[25] UNIV TOKYO,INT CTR ELEMENTARY PARTICLE PHYS,TOKYO 113,JAPAN

[26] UNIV TOKYO,DEPT PHYS,TOKYO 113,JAPAN

[27] KOBE UNIV,KOBE 657,JAPAN

[28] BRUNEL UNIV,UXBRIDGE UB8 3PH,MIDDX,ENGLAND

[29] WEIZMANN INST SCI,DEPT PARTICLE PHYS,IL-76100 REHOVOT,ISRAEL

[30] UNIV HAMBURG,DESY,INST EXPTL PHYS 2,D-22607 HAMBURG,GERMANY

[31] UNIV VICTORIA,DEPT PHYS,VICTORIA V8W 3P6,BC,CANADA

[32] UNIV BRITISH COLUMBIA,DEPT PHYS,VANCOUVER V6T 1Z1,BC,CANADA

[33] UNIV ALBERTA,DEPT PHYS,EDMONTON T6G 2J1,AB,CANADA

[34] DUKE UNIV,DEPT PHYS,DURHAM,NC 27708

[35] RHEIN WESTFAL TH AACHEN,INST PHYS 3,D-52056 AACHEN,GERMANY

来源：

PHYSICS LETTERS B | 1994年 / 337卷 / 1-2期

基金：

加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

D O I：

10.1016/0370-2693(94)91470-2

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A search for a supersymmetric partner of the top quark (($) over tilde t(1)) has been performed by the OPAL experiment in e(+)e(-) collisions at LEP. The integrated luminosity of the data sample analysed was 69.1 pb(-1), which corresponds to 1.68 x 10(6) produced Z(0) --> q ($) over tilde q events. No ($) over tilde t(1) candidates have been found. This study excludes the existence of the ($) over tilde t(1) with a mass below 45.1 GeV at 95% C.L., where the mixing angle of left- and right-handed partners is smaller than 0.85 rad or greater than 1.15 rad, and the mass difference between the ($) over tilde t(1) and the lightest neutralino is greater than 5 GeV.

引用

页码：207 / 218

页数：12

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