SEARCH FOR ISOSINGLET NEUTRAL HEAVY-LEPTONS IN Z0 DECAYS

被引：114

作者：

ADRIANI, O

AGUILARBENITEZ, M

AHLEN, S

ALCARAZ, J

ALOISIO, A

ALVERSON, G

ALVIGGI, MG

AMBROSI, G

AN, Q

ANDERHUB, H

ANDERSON, AL

ANDREEV, VP

ANGELOV, T

ANTONOV, L

ANTREASYAN, D

ARCE, P

AREFIEV, A

ATAMANCHUK, A

AZEMOON, T

AZIZ, T

BABA, PVKS

BAGNAIA, P

BAKKEN, JA

BAKSAY, L

BALL, RC

BANERJEE, S

BAO, J

BARILLERE, R

BARONE, L

BASCHIROTTO, A

BATTISTON, R

BAY, A

BECATTINI, F

BECKER, U

BEHNER, F

BEHRENS, J

BEINGESSNER, S

BENCZE, GL

BERDUGO, J

BERGES, P

BERTUCCI, B

BETEV, BL

BIASINI, M

BILAND, A

BILEI, GM

BIZZARRI, R

BLAISING, JJ

BOBBINK, GJ

BOCCIOLINI, M

BOCK, R

机构：

[1] CTR INVEST ENERGETICAS MEDIOAMBIENTALES & TECNOL, E-28040 MADRID, SPAIN

[2] CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND

[3] INFN, SEZ NAPOLI, I-80125 NAPLES, ITALY

[4] INFN, SEZ PERUGIA, I-06100 PERUGIA, ITALY

[5] WORLD LAB, FBLJA PROJECT, CH-1211 GENEVA 23, SWITZERLAND

[6] ST PETERSBURG NUCL PHYS INST, ST PETERSBURG, USSR

[7] UNIV FLORENCE, I-50125 FLORENCE, ITALY

[8] BOSTON UNIV, BOSTON, MA 02215 USA

[9] NAPLES UNIV, I-80125 NAPLES, ITALY

[10] NORTHEASTERN UNIV, BOSTON, MA 02115 USA

[11] UNIV PERUGIA, I-06100 PERUGIA, ITALY

[12] SWISS FED INST TECHNOL, CH-8093 ZURICH, SWITZERLAND

[13] MIT, CAMBRIDGE, MA 02139 USA

[14] MOSCOW THEORET & EXPTL PHYS INST, MOSCOW 117259, USSR

[15] UNIV MICHIGAN, ANN ARBOR, MI 48109 USA

[16] TATA INST FUNDAMENTAL RES, BOMBAY 400005, INDIA

[17] RHEIN WESTFAL TH AACHEN, INST PHYS 1, W-5100 AACHEN, GERMANY

[18] RHEIN WESTFAL TH AACHEN, INST PHYS 3, W-5100 AACHEN, GERMANY

[19] UNIV ROME LA SAPIENZA, I-00185 ROME, ITALY

[20] PRINCETON UNIV, PRINCETON, NJ 08544 USA

[21] JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA

[22] UNIV GENEVA, CH-1211 GENEVA 4, SWITZERLAND

[23] CATHOLIC UNIV NIJMEGEN, 6525 ED NIJMEGEN, NETHERLANDS

[24] CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA

[25] LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA

[26] PURDUE UNIV, W LAFAYETTE, IN 47907 USA

[27] LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA

[28] OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA

[29] UNIV LAUSANNE, CH-1015 LAUSANNE, SWITZERLAND

[30] HARVARD UNIV, CAMBRIDGE, MA 02139 USA

[31] CALTECH, PASADENA, CA 91125 USA

[32] BULGARIAN ACAD SCI, INST MECHATRON, BU-1113 SOFIA, BULGARIA

[33] INFN, SEZ BOLOGNA, I-40126 BOLOGNA, ITALY

[34] INFN, SEZ ROMA, I-00185 ROME, ITALY

[35] UNIV ALABAMA, TUSCALOOSA, AL 35486 USA

[36] INFN, SEZ MILANO, I-20133 MILAN, ITALY

[37] IN2P3, LAB ANNECY VIEUX PHYS PARTICULES, CNRS, F-74941 ANNECY LE VIEUX, FRANCE

[38] HUNGARIAN ACAD SCI, CENT RES INST PHYS, H-1525 BUDAPEST 114, HUNGARY

[39] NATL INST HIGH ENERGY PHYS, 1009 DB AMSTERDAM, NETHERLANDS

[40] NIKHEF NIJMEGEN, 6525 ED NIJMEGEN, NETHERLANDS

[41] UNIV CALIF SAN DIEGO, SAN DIEGO, CA 92182 USA

[42] UNIV LYON 1, IN2P3, INST PHYS NUCL LYON, CNRS, F-69622 VILLEURBANNE, FRANCE

[43] INST HIGH ENERGY PHYS, BEIJING, PEOPLES R CHINA

[44] CHINESE UNIV SCI & TECHNOL, HEFEI 230029, PEOPLES R CHINA

[45] KOREA ADV INST SCI & TECHNOL, CTR HIGH ENERGY PHYS, TAEJON 305701, SOUTH KOREA

[46] UNIV SANTIAGO, DEPT FIS PARTICULAS ELEMENTALES, E-15706 SANTIAGO, SPAIN

[47] PAUL SCHERRER INST, CH-5232 VILLIGEN, SWITZERLAND

[48] SHANGHAI INST CERAM, SHANGHAI, PEOPLES R CHINA

[49] DESY, INST HOCHENERGIEPHYS, O-1615 ZEUTHEN, GERMANY

[50] UNIV CYPRUS, DEPT NAT SCI, NICOSIA, CYPRUS

来源：

PHYSICS LETTERS B | 1992年 / 295卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(92)91579-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We search for neutral heavy leptons that are isosinglets under the standard SU(2)L gauge group. Such neutral heavy leptons are expected in many extensions of the standard model. Three types of heavy leptons Ne, N(mu), N(tau) associated with the three neutrino types nu(e), nu(mu), nu(tau) have been directly searched for and no evidence for a signal has been found. We set the limit Br(Z0 --> nu(l)N(l)) < 3 x 10(-5) at the 95% CL for the mass range from 3 GeV up to m(Z).

引用

页码：371 / 382

页数：12