DETERMINATION OF THE NUMBER OF LIGHT NEUTRINO SPECIES

被引：28

作者：

ADRIANI, O

AGUILARBENITEZ, M

AHLEN, S

AKBARI, H

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

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

BLUMENFELD, B

BOBBINK, GJ

BOCCIOLINI, M

机构：

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

[2] BOSTON UNIV, BOSTON, MA 02215 USA

[3] JOHNS HOPKINS UNIV HOSP, BALTIMORE, MD 21218 USA

[4] CERRO TOLOLO INTERAMER OBSERV, EUROPEAN LAB PARTICULE PHYS, LA SERENA, CHILE

[5] IST NAZL FIS NUCL, I-80125 NAPLES, ITALY

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

[7] NORTHEASTERN UNIV, BOSTON, MA 02115 USA

[8] IST NAZL FIS NUCL, I-06100 PERUGIA, ITALY

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

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

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

[12] MIT, CAMBRIDGE, MA 02139 USA

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

[14] BULGARIAN ACAD SCI, BU-1113 SOFIA, BULGARIA

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

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

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

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

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

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

[21] IST NAZL FIS NUCL, I-00185 ROME, ITALY

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

[23] PRINCETON UNIV, PRINCETON, NJ 08544 USA

[24] UNIV ALABAMA, UNIVERSITY, AL 35486 USA

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

[26] LAB PHYS PARTICULES, F-74941 ANNECYVIEUX, FRANCE

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

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

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

[30] NIKHEF NIJMEGEN, 6525 ED NIJMEGEN, NETHERLANDS

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

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

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

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

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

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

[37] INST HIGH ENERGY, BEIJING, PEOPLES R CHINA

[38] HIGH ENERGY PHYS GRP, TAIPEI, TAIWAN

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

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

[41] UNIV SANTIAGO, DEPT FIS PARTICULES ELEMENTALES, E-15706 SANTIAGO, SPAIN

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

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

[44] DESY, INST HOCHENENERGIEPHYS, O-1615 ZEUTHEN, GERMANY

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

[46] CALTECH, PASADENA, CA 91125 USA

[47] HARVARD UNIV, CAMBRIDGE, MA 02139 USA

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

[49] UNIV HAMBURG, W-2000 HAMBURG 13, GERMANY

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

来源：

PHYSICS LETTERS B | 1992年 / 292卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(92)91204-M

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have measured the cross-section of the production of single photon events in e+e- collisions near the Z0 resonance. For an integrated luminosity of 9.6 pb-1, we have observed 202 single photon candidates with energy between 0.9 and 3.5 GeV in the polar angular region between 45-degrees and 135-degrees. Assuming that the only stable weakly interacting particles are light neutrinos with standard model couplings, we determine the number of light neutrino species to be N(nu) = 3.14 +/- 0.24 (stat.) +/- 0.12 (syst.). This corresponds to an invisible Z0 width of GAMMA(inv) = 524 +/- 40 +/- 20 MeV.

引用

页码：463 / 471

页数：9

共 20 条

[1] LOWER LIMIT ON THE TOP-QUARK MASS FROM EVENTS WITH 2 LEPTONS IN PPBAR COLLISIONS AT SQUARE-ROOT=1.8 TEV [J].

ABE, F ;

AMIDEI, D ;

APOLLINARI, G ;

ATAC, M ;

AUCHINCLOSS, P ;

BADEN, AR ;

BACCHETTA, N ;

BAILEY, MW ;

BAMBERGER, A ;

BARNETT, BA ;

BARBAROGALTIERI, A ;

BARNES, VE ;

BAUMANN, T ;

BEDESCHI, F ;

BEHRENDS, S ;

BELFORTE, S ;

BELLETTINI, G ;

BELLINGER, J ;

BENJAMIN, D ;

BENSINGER, J ;

BERETVAS, A ;

BERGE, JP ;

BERTOLUCCI, S ;

BHADRA, S ;

BINKLEY, M ;

BLAIR, R ;

BLOCKER, C ;

BOLOGNESI, V ;

BOOTH, AW ;

BOSWELL, C ;

BRANDENBURG, G ;

BROWN, D ;

BUCKLEYGEER, E ;

BUDD, HS ;

BUSETTO, G ;

BYONWAGNER, A ;

BYRUM, KL ;

CAMPAGNARI, C ;

CAMPBELL, M ;

CANER, A ;

CAREY, R ;

CARITHERS, W ;

CARLSMITH, D ;

CARROLL, JT ;

CASHMORE, R ;

CASTRO, A ;

CERVELLI, F ;

CHADWICK, K ;

CHIARELLI, G ;

CHINOWSKY, W .

PHYSICAL REVIEW LETTERS, 1992, 68 (04) :447-451

[2]

ADEVA B, 1991, Z PHYS C PART FIELDS, V51, P179, DOI [10.1007/BF01475788, 10.1007/BF01475789]

[3] THE CONSTRUCTION OF THE L3 EXPERIMENT [J].

ADEVA, B ;

AGUILARBENITEZ, M ;

AKBARI, H ;

ALCARAZ, J ;

ALOISIO, A ;

ALVAREZTAVIEL, J ;

ALVERSON, G ;

ALVIGGI, MG ;

ANDERHUB, H ;

ANDERSON, AL ;

ANGELOV, AM ;

ANGELOV, TH ;

ANTCHEV, GH ;

ANTONOV, L ;

ANTREASYAN, D ;

AREFIEV, A ;

ATANASOV, IH ;

AUROY, B ;

AYAD, R ;

AYRANOV, OL ;

AZEMOON, T ;

AZIZ, T ;

BACHMANN, U ;

BAHLER, P ;

BAKKEN, JA ;

BAKSAY, L ;

BALDINGER, H ;

BALL, RC ;

BALLANSAT, J ;

BANERJEE, S ;

BAO, J ;

BARBIER, G ;

BARONE, L ;

BASTI, G ;

BAY, A ;

BEAUVAIS, F ;

BECKER, U ;

BEISSEL, R ;

BENDIG, S ;

BENE, P ;

BERDUGO, J ;

BERGES, P ;

BERTHET, M ;

BERTSCH, Y ;

BETEV, BL ;

BILAND, A ;

BISCHOFF, A ;

BISCHOPS, M ;

BIZZARRI, R ;

BLAISING, JJ .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1990, 289 (1-2) :35-102

[4] A DIRECT DETERMINATION OF THE NUMBER OF LIGHT NEUTRINO FAMILIES FROM E+E--]NU-NU-BAR-GAMMA AT LEP [J].

ADEVA, B ;

ADRIANI, O ;

AGUILARBENITEZ, M ;

AKBARI, H ;

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 ;

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 ;

BLOMEKE, P ;

BLUMENFELD, B ;

BOBBINK, GJ .

PHYSICS LETTERS B, 1992, 275 (1-2) :209-221

[5]

AKRAWY MZ, 1991, Z PHYS C PART FIELDS, V50, P373, DOI 10.1007/BF01551449

[6] RADIATIVE Z0 PRODUCTION - A METHOD FOR NEUTRINO COUNTING IN E+E- COLLISIONS [J].

BARBIELLINI, G ;

RICHTER, B ;

SIEGRIST, JL .

PHYSICS LETTERS B, 1981, 106 (05) :414-418

[7] RADIATIVE-CORRECTIONS TO THE PROCESS E+E--]NU-NUBAR-GAMMA [J].

BERENDS, FA ;

BURGERS, GJH ;

MANA, C ;

MARTINEZ, M ;

VANNEERVEN, WL .

NUCLEAR PHYSICS B, 1988, 301 (04) :583-600

[8] THE 1ST LEVEL ENERGY TRIGGER OF THE L3 EXPERIMENT - DESCRIPTION OF THE HARDWARE [J].

BIZZARRI, R ;

CESARONI, F ;

GENTILE, S ;

LUNADEI, G ;

FUKUSHIMA, M ;

HEBBEKER, T .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1992, 317 (03) :463-473

[9]

BRUN R, CERNDDEE841 US GUID

[10] SIGNALS FROM NON-STRONGLY INTERACTING SUPERSYMMETRIC PARTICLES AT LEP ENERGIES [J].

CHEN, M ;

DIONISI, C ;

MARTINEZ, M ;

TATA, X .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1988, 159 (4-5) :201-301

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