SEARCH FOR THE T AND B' QUARKS IN HADRONIC DECAYS OF THE Z0 BOSON

被引：19

作者：

ABREU, P

ADAM, W

ADAMI, F

ADYE, T

ALEKSEEV, GD

ALLABY, JV

ALLEN, P

ALMEHED, S

ALTED, F

ALVSVAAG, SJ

AMALDI, U

ANASSONTZIS, E

APEL, WD

ASMAN, B

FERRERES, CA

AUGUSTIN, JE

AUGUSTINUS, A

BAILLON, P

BAMBADE, P

BARAO, F

BARBIELLINI, G

BARDIN, DY

BARONCELLI, A

BARRING, O

BARTL, W

BATES, MJ

BATYUNIA, BV

BAUBILLIER, M

BECKS, KH

BEESTON, CJ

BEILLIERE, P

BELOKOPYTOV, I

BELTRAN, P

BENEDIC, D

BENLLOCH, JM

BERGGREN, M

BERTRAND, D

BIAGI, S

BIANCHI, F

BIBBY, JH

BILENKY, MS

BILLOIR, P

BJARNE, J

BLOCH, D

BOGOLUBOV, PN

BOLLINI, D

BOLOGNESE, T

BONAPART, M

BONYUSHKIN, YE

BOOTH, PSL

机构：

[1] AUSTRIAN ACAD SCI,INST HOCHENERGIEPHYS,A-1050 VIENNA,AUSTRIA

[2] CENS,PPHPE,F-91191 GIF SUR YVETTE,FRANCE

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

[4] JOINT INST NUCL RES,MOSCOW 101000,USSR

[5] CERN,CH-1211 GENEVA 23,SWITZERLAND

[6] UNIV VALENCIA,CSIC,CTR MIXTO,INST FIS CORPUSCULAR,E-46100 BURJASSOT,SPAIN

[7] UNIV LUND,DEPT PHYS,S-22363 LUND,SWEDEN

[8] UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY

[9] UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE

[10] UNIV KARLSRUHE,INST EXPTL KERNPHYS,W-7500 KARLSRUHE 1,GERMANY

[11] UNIV STOCKHOLM,INST PHYS,S-11346 STOCKHOLM,SWEDEN

[12] UNIV SANTANDER,FAC CIENCIAS,E-39005 SANTANDER,SPAIN

[13] UNIV PARIS 11,ACCELERATEUR LINEAIRE LAB,F-91405 ORSAY,FRANCE

[14] UNIV TRIESTE,DEPARTIMENTO FIS,I-34127 TRIESTE,ITALY

[15] IST NAZL FIS NUCL,TRIESTE,ITALY

[16] UNIV UDINE,IST FIS,I-33100 UDINE,ITALY

[17] IST NAZL FIS NUCL,IST SUPER SANITA,I-00161 ROME,ITALY

[18] UNIV ROME 2,DIPARTIMENTO FIS,I-00173 ROME,ITALY

[19] NATL INST NUCL PHYS,ROME,ITALY

[20] UNIV OXFORD,NUCL PHYS LAB,OXFORD OX1 3RH,ENGLAND

[21] UNIV PARIS 06,LPNHE,F-75230 PARIS 05,FRANCE

[22] UNIV PARIS 07,LPNHE,F-75221 PARIS 05,FRANCE

[23] UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,W-5600 WUPPERTAL 1,GERMANY

[24] COLL FRANCE,PHYS CORPUSCULAIRE LAB,F-75231 PARIS 05,FRANCE

[25] SERPUKHOV HIGH ENERGY PHYS INST,SERPUKHOV 142284,USSR

[26] GREEK ATOM ENERGY COMMISS,NUCL RES CTR DEMOKRITOS,GR-15310 ATHENS,GREECE

[27] CTR RECH NUCL,GRP DELPHI,DIV HAUTES ENERGIES,F-67037 STRASBOURG,FRANCE

[28] UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM

[29] UNIV LIBRE BRUXELLES,IIHE,B-1050 BRUSSELS,BELGIUM

[30] UNIV ETAT MONS,FAC SCI,SERV PHYS PARTICULES ELEMENTAIRES,B-7000 MONS,BELGIUM

[31] UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,ENGLAND

[32] UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE,I-10125 TURIN,ITALY

[33] IST NAZL FIS NUCL,I-10125 TURIN,ITALY

[34] UNIV BOLOGNA,DEPARTIMENTO FIS,I-40126 BOLOGNA,ITALY

[35] IST NAZL FIS NUCL,BOLOGNA,ITALY

[36] NATL INST NUCL PHYS & HIGH ENERGY PHYS,1009 DB AMSTERDAM,NETHERLANDS

[37] UNIV UPPSALA,DEPT RADIAT SCI,S-75121 UPPSALA,SWEDEN

[38] UNIV GENOA,DEPARTIMENTO FIS,I-16126 GENOA,ITALY

[39] IST NAZL FIS NUCL,I-16146 GENOA,ITALY

[40] UNIV HELSINKI,DEPT HIGH ENERGY PHYS,SF-00170 HELSINKI 17,FINLAND

[41] UNIV OSLO,DEPT PHYS,N-1000 OSLO 3,NORWAY

[42] UNIV MILAN,DEPARTIMENTO FIS,I-20133 MILAN,ITALY

[43] NATL INST NUCL PHYS,MILAN,ITALY

[44] UNIV PADUA,DEPARTIMENTO FIS,I-35100 PADUA,ITALY

[45] IST NAZL FIS NUCL,PADUA,ITALY

[46] IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011

[47] IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011

[48] NIELS BOHR INST,DK-2100 COPENHAGEN,DENMARK

[49] INST NUCL STUDIES,PL-00681 WARSAW,POLAND

[50] NATL TECH UNIV ATHENS,DEPT PHYS,GR-15773 ATHENS,GREECE

来源：

PHYSICS LETTERS B | 1990年 / 242卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(90)91808-O

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a search for the third generation up type quark t and a possible fourth down type quark b' in hadronic Z0 decays observed in DELPHI at the LEP collider. For any scenario with a decay through the charged current or into a charged Higgs with a mass at least 6 GeV/c2 below the t and 3 GeVc2 below the b' mass, we set a lower limit for the t quark mass at 44.0 GeV/c2 and for the b' mass at 44.5 GeV/c2. For specific scenarios the mass limits are slightly higher, e.g. for charged current decays the limits are 44.5 and 45.0 GeV/c2 respectively, where all limits are given at a 95% confidence level. © 1990.

引用

页码：536 / 546

页数：11

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