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

被引：28

作者：

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

机构：

[1] IST NAZL FIS NUCL,SEZ FIRENZE,I-50125 FLORENCE,ITALY

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

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

[4] JOHNS HOPKINS UNIV,BALTIMORE,MD 21218

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

[6] IST NAZL FIS NUCL,SEZ NAPOLI,I-80125 NAPLES,ITALY

[7] NORTHEASTERN UNIV,BOSTON,MA 02115

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

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

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

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

[12] MIT,CAMBRIDGE,MA 02139

[13] ST PETERSBURG NUCL PHYS INST,ST PETERSBURG 188350,USSR

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

[15] PURDUE UNIV,W LAFAYETTE,IN 47907

[16] UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550

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

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

[19] OAK RIDGE NATL LAB,OAK RIDGE,TN 37830

[20] CATHOLIC UNIV NIJMEGEN,NIJMEGEN,NETHERLANDS

[21] NATL INST NUCL PHYS & HIGH ENERGY PHYS,6525 ED NIJMEGEN,NETHERLANDS

[22] PAUL SCHERRER INST,WURENLINGEN,SWITZERLAND

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

[24] INST HOCHENERGIEPHYS,O-1615 ZEUTHEN,GERMANY

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

[26] CALTECH,PASADENA,CA 91125

[27] HARVARD UNIV,CAMBRIDGE,MA 02139

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

[29] CLANP,CENT LAB AUTOMAT & INSTRUMENTAT,SOFIA,BULGARIA

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

[31] UNIV MICHIGAN,ANN ARBOR,MI 48109

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

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

[34] IST NAZL FIS NUCL,SEZ ROMA,I-00185 ROME,ITALY

[35] UNIV ALABAMA,TUSCALOOSA,AL 35486

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

[37] LAB PHYS PARTICULES,F-74519 ANNECY LE VIEUX,FRANCE

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

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

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

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

[42] UNIV CALIF SAN DIEGO,SAN DIEGO,CA 92182

[43] CARNEGIE MELLON UNIV,PITTSBURGH,PA 15213

[44] UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87544

来源：

PHYSICS LETTERS B | 1992年 / 275卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(92)90877-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The L3 detector at LEP has been used to determine the number of light neutrino families by measuring the cross section of single photon even in e+e- collisions at energies near the Z0 resonance. We have observed 61 single photon candidates with more than 1.5 GeV of deposited energy in the barrel electromagnetic calorimeter, for a total integrated luminosity of 3.0 pb-1. From a likelihood fit to the single photon cross sections, we determine N(nu) = 3.24 +/- 0.46 (statistical) +/- 0.22 (systematic).

引用

页码：209 / 221

页数：13

共 32 条

[1] A STUDY ON SINGLE PHOTON PRODUCTION AT SQUARE-ROOT-S =54.0-61.4 GEV [J].

ABE, K ;

AMAKO, K ;

ARAI, Y ;

ASANO, Y ;

CHIBA, M ;

CHIBA, Y ;

DAIGO, M ;

EMURA, T ;

ENDO, I ;

FUKAWA, M ;

FUKUI, T ;

FUKUSHIMA, Y ;

HABA, J ;

HAIDT, D ;

HAYASHIBARA, I ;

HEMMI, Y ;

HIGUCHI, M ;

HIROSE, T ;

HOJYO, Y ;

HOMMA, Y ;

HOSHI, Y ;

IKEGAMI, Y ;

ISHIHARA, N ;

KAMITANI, T ;

KANEMATSU, N ;

KANZAKI, J ;

KIKUCHI, R ;

KONDO, T ;

KOSEKI, T ;

KURASHIGE, H ;

MATSUI, T ;

MINAMI, M ;

MIYAKE, K ;

MORI, S ;

NAGASHIMA, Y ;

NAKAMURA, T ;

NAKANO, I ;

NARITA, Y ;

ODAKA, S ;

OGAWA, K ;

OHAMA, T ;

OHSUGI, T ;

OKAMOTO, A ;

ONO, A ;

OSABE, H ;

OYAMA, T ;

SAITO, H ;

SAKAE, H ;

SAKAMOTO, H ;

SAKAMOTO, S .

PHYSICS LETTERS B, 1989, 232 (03) :431-436

[2]

ABREU P, 1991, CERNPPE9195 PREPR

[3]

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

[4] 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

[5]

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

[6]

ALEXANDER G, 1991, CERNPPE9167 PREPR

[7] 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

[8] NEUTRINO COUNTING WITH THE CELLO DETECTOR AND SEARCH FOR SUPERSYMMETRIC PARTICLES [J].

BEHREND, HJ ;

CRIEGEE, L ;

DAINTON, JB ;

FIELD, JH ;

FRANKE, G ;

JUNG, H ;

MEYER, J ;

SCHRODER, V ;

WINTER, GG ;

BUSSEY, PJ ;

BUTTAR, C ;

CAMPBELL, AJ ;

HENDRY, D ;

MCCURRACH, G ;

SCARR, JM ;

SKILLICORN, IO ;

SMITH, KM ;

AHME, J ;

BLOBEL, V ;

FEINDT, M ;

FENNER, H ;

HARJES, J ;

PETERS, JH ;

POPPE, M ;

SPITZER, H ;

APEL, WD ;

BOHRER, A ;

ENGLER, J ;

FLUGGE, G ;

FRIES, DC ;

FUSTER, J ;

GAMERDINGER, K ;

GROSSEWIESMANN, P ;

HANSMEYER, J ;

KNAPP, J ;

KUSTER, H ;

MAYER, P ;

MULLER, H ;

RANITZSCH, KH ;

SCHNEIDER, H ;

WOLF, J ;

DEBOER, W ;

BUSCHHORN, G ;

GRINDHAMMER, G ;

GUNDERSON, B ;

KIESLING, C ;

KOTTHAUS, R ;

KROHA, H ;

LUERS, D ;

OBERLACK, H .

PHYSICS LETTERS B, 1988, 215 (01) :186-194

[9] DISTRIBUTIONS FOR ELECTRON-POSITRON ANNIHILATION INTO 2 AND 3 PHOTONS [J].

BERENDS, FA ;

KLEISS, R .

NUCLEAR PHYSICS B, 1981, 186 (01) :22-34

[10] 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

← 1 2 3 4 →