Determination of the number of light neutrino species from single photon production at LEP

被引：29

作者：

Acciarri, M

Adriani, O

Aguilar-Benitez, M

Ahlen, S

Alcaraz, J

Alemanni, G

Allaby, J

Aloisio, A

Alviggi, MG

Ambrosi, G

Anderhub, H

Andreev, VP

Angelescu, T

Anselmo, F

Arefiev, A

Azemoon, T

Aziz, T

Bagnaia, P

Baksay, L

Ball, RC

Banerjee, S

Banicz, K

Barczyk, A

Barillere, R

Barone, L

Bartalini, P

Baschirotto, A

Basile, M

Battiston, R

Bay, A

Becattini, F

Becker, U

Behner, F

Berdugo, J

Berges, P

Bertucci, B

Betev, BL

Bhattacharya, S

Biasini, M

Biland, A

Bilei, GM

Bizzarri, R

Blaising, JJ

Blyth, SC

Bobbink, GJ

Bock, R

Bohm, A

Boldizsar, L

Borgia, B

机构：

[1] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

[2] Rhein Westfal TH Aachen, Inst Phys 1, D-52056 Aachen, Germany

[3] Rhein Westfal TH Aachen, Inst Phys 3, D-52056 Aachen, Germany

[4] NIKHEF H, Natl Inst High Energy Phys, NL-1009 DB Amsterdam, Netherlands

[5] Univ Amsterdam, NL-1009 DB Amsterdam, Netherlands

[6] Univ Michigan, Ann Arbor, MI 48109 USA

[7] Lab Annecy Le Vieux Phys Particules, LAPP, IN2P3, CNRS, F-74941 Annecy Le Vieux, France

[8] Johns Hopkins Univ, Baltimore, MD 21218 USA

[9] Univ Basel, Inst Phys, CH-4056 Basel, Switzerland

[10] Inst High Energy Phys, Beijing 100039, Peoples R China

[11] Humboldt Univ, D-10099 Berlin, Germany

[12] Univ Bologna, I-40126 Bologna, Italy

[13] Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy

[14] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

[15] Boston Univ, Boston, MA 02215 USA

[16] Northeastern Univ, Boston, MA 02115 USA

[17] Inst Atom Phys, R-76900 Bucharest, Romania

[18] Univ Bucharest, R-76900 Bucharest, Romania

[19] Hungarian Acad Sci, Cent Res Inst Phys, H-1525 Budapest 114, Hungary

[20] MIT, Cambridge, MA 02139 USA

[21] Univ Florence, I-50139 Florence, Italy

[22] INFN, Sez Firenze, I-50139 Florence, Italy

[23] CERN, European Lab Particle Phys, CH-1211 Geneva 23, Switzerland

[24] World Lab, FBLJA Project, CH-1211 Geneva 23, Switzerland

[25] Univ Geneva, CH-1211 Geneva 4, Switzerland

[26] Univ Sci & Technol China, Hefei 230029, Anhui, Peoples R China

[27] SEFT, Res Inst High Energy Phys, SF-00014 Helsinki, Finland

[28] Univ Lausanne, CH-1015 Lausanne, Switzerland

[29] Ist Nazl Fis Nucl, Sez Lecce, I-73100 Lecce, Italy

[30] Univ Lecce, I-73100 Lecce, Italy

[31] Los Alamos Natl Lab, Los Alamos, NM 87544 USA

[32] Univ Claude Bernard, Inst Phys Nucl Lyon, IN2P3, CNRS, F-69622 Villeurbanne, France

[33] CIEMAT, Ctr Invest Energet Medioambientales & Tecnol, E-28040 Madrid, Spain

[34] Inst Theoret & Expt Phys, Moscow 117259, Russia

[35] Ist Nazl Fis Nucl, Sez Napoli, I-80125 Naples, Italy

[36] Univ Naples Federico II, I-80125 Naples, Italy

[37] Univ Cyprus, Dept Nat Sci, Nicosia, Cyprus

[38] Catholic Univ Nijmegen, NL-6525 ED Nijmegen, Netherlands

[39] Natl Inst Nucl Phys & High Energy Phys, NL-6525 ED Nijmegen, Netherlands

[40] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[41] CALTECH, Pasadena, CA 91125 USA

[42] Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy

[43] Univ Perugia, I-06100 Perugia, Italy

[44] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[45] Princeton Univ, Princeton, NJ 08544 USA

[46] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy

[47] Univ Roma La Sapienza, I-00185 Rome, Italy

[48] Inst Phys Nucl, St Petersburg, Russia

[49] Univ Salerno, I-84100 Salerno, Italy

[50] INFN, I-84100 Salerno, Italy

来源：

PHYSICS LETTERS B | 1998年 / 431卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(98)00519-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A determination of the number of light neutrino families performed by measuring the cross section of single photon production in e(+)e(-) collision near the Z resonance is reported. From an integrated luminosity of 100 pb(-1), collected during the years 1991-94, we have observed 2091 single photon candidates with an energy above 1 GeV in the polar angular region 45 degrees < theta(gamma) < 135 degrees. From a maximum likelihood fit to the single photon cross section, the Z decay width into invisible particles is measured to be Gamma(inv) = 498 +/- 12(stat) +/- 12(sys)MeV. Using the Standard Model couplings of neutrinos to the Z, the number of light neutrino species is determined to be N-v = 2.98 +/- 0.07(stat) +/- 0.07(sys). (C) 1998 Published by Elsevier Science B.V. All rights reserved.

引用

页码：199 / 208

页数：10

共 45 条

[1] OBSERVATION OF THE TOP-QUARK [J].

ABACHI, S ;

ABBOTT, B ;

ABOLINS, M ;

ACHARYA, BS ;

ADAM, I ;

ADAMS, DL ;

ADAMS, M ;

AHN, S ;

AIHARA, H ;

ALITTI, J ;

ALVAREZ, G ;

ALVES, GA ;

AMIDI, E ;

AMOS, N ;

ANDERSON, EW ;

ARONSON, SH ;

ASTUR, R ;

AVERY, RE ;

BADEN, A ;

BALAMURALI, V ;

BALDERSTON, J ;

BALDIN, B ;

BANTLY, J ;

BARTLETT, JF ;

BAZIZI, K ;

BENDICH, J ;

BERI, SB ;

BERTRAM, I ;

BEZZUBOV, VA ;

BHAT, PC ;

BHATNAGAR, V ;

BHATTACHARJEE, M ;

BISCHOFF, A ;

BISWAS, N ;

BLAZEY, G ;

BLESSING, S ;

BOEHNLEIN, A ;

BOJKO, NI ;

BORCHERDING, F ;

BORDERS, J ;

BOSWELL, C ;

BRANDT, A ;

BROCK, R ;

BROSS, A ;

BUCHHOLZ, D ;

BURTOVOI, VS ;

BUTLER, JM ;

CASEY, D ;

CASTILLAVALDEZ, H ;

CHAKRABORTY, D .

PHYSICAL REVIEW LETTERS, 1995, 74 (14) :2632-2637

[2] NEARBY DOORWAY STATES, PARITY DOUBLETS, AND PARITY MIXING IN COMPOUND NUCLEAR-STATES [J].

AUERBACH, N ;

BOWMAN, JD ;

SPEVAK, V .

PHYSICAL REVIEW LETTERS, 1995, 74 (14) :2638-2641

[3] 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

[4] Search for direct photons from S-Au collisions at 200 GeV/nucleon by the CERES collaboration - Comment [J].

Kampert, KH ;

Awes, TC ;

Stankus, P ;

Gutbrod, HH ;

Manko, V ;

Peitzmann, T ;

Santo, R .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1997, 74 (04) :587-591

[5] Search for new physics in energetic single photon production in e(+)e(-) annihilation at the Z resonance [J].

Acciarri, M ;

Adriani, O ;

AguilarBenitez, M ;

Ahlen, S ;

Alcaraz, J ;

Alemanni, G ;

Allaby, J ;

Aloisio, A ;

Alverson, G ;

Alviggi, MG ;

Ambrosi, G ;

Anderhub, H ;

Andreev, VP ;

Angelescu, T ;

Anselmo, F ;

Arefiev, A ;

Azemoon, T ;

Aziz, T ;

Bagnaia, P ;

Baksay, L ;

Ball, RC ;

Banerjee, S ;

Banicz, K ;

Barczyk, A ;

Barillere, R ;

Barone, L ;

Bartalini, P ;

Baschirotto, A ;

Basile, M ;

Battiston, R ;

Bay, A ;

Becattini, F ;

Becker, U ;

Behner, F ;

Berdugo, J ;

Berges, P ;

Bertucci, B ;

Betev, BL ;

Bhattacharya, S ;

Biasini, M ;

Biland, A ;

Bilei, GM ;

Blaising, JJ ;

Blyth, SC ;

Bobbink, GJ ;

Bock, R ;

Bohm, A ;

Boldizsar, L ;

Borgia, B .

PHYSICS LETTERS B, 1997, 412 (1-2) :201-209

[6] Search for the standard model Higgs boson in e(+)e(-) interactions at 161<=root s<=172 GeV [J].

Acciarri, M ;

Adriani, O ;

AguilarBenitez, M ;

Ahlen, S ;

Alcaraz, J ;

Alemanni, G ;

Allaby, J ;

Aloisio, A ;

Alverson, G ;

Alviggi, MG ;

Ambrosi, G ;

Anderhub, H ;

Andreev, VP ;

Angelescu, T ;

Anselmo, F ;

Arefiev, A ;

Azemoon, T ;

Aziz, T ;

Bagnaia, P ;

Baksay, L ;

Banerjee, S ;

Banicz, K ;

Barczyk, A ;

Barillere, R ;

Barone, L ;

Bartalini, P ;

Baschirotto, A ;

Basile, M ;

Battiston, R ;

Bay, A ;

Becattini, F ;

Becker, U ;

Behner, F ;

Berdugo, J ;

Berges, P ;

Bertucci, B ;

Betev, BL ;

Bhattacharya, S ;

Biasini, M ;

Biland, A ;

Bilei, GM ;

Blaising, JJ ;

Blyth, SC ;

Bobbink, GJ ;

Bock, R ;

Bohm, A ;

Boldizsar, L ;

Borgia, B ;

Bourilkov, D .

PHYSICS LETTERS B, 1997, 411 (3-4) :373-386

[7] MEASUREMENT OF ENERGETIC SINGLE-PHOTON PRODUCTION AT LEP [J].

ACCIARRI, M ;

ADAM, A ;

ADRIANI, O ;

AGUILARBENITEZ, M ;

AHLEN, S ;

ALCARAZ, J ;

ALOISIO, A ;

ALVERSON, G ;

ALVIGGI, MG ;

AMBROSI, G ;

AN, Q ;

ANDERHUB, H ;

ANDERSON, AL ;

ANDREEV, VP ;

ANGELESCU, T ;

ANTONOV, L ;

ANTREASYAN, D ;

ALKHAZOV, G ;

ARCE, P ;

AREFIEV, A ;

AZEMOON, T ;

AZIZ, T ;

BABA, PVKS ;

BAGNAIA, P ;

BAKKEN, JA ;

BAKSAY, L ;

BALL, RC ;

BANERJEE, S ;

BANICZ, K ;

BARILLERE, R ;

BARONE, L ;

BASCHIROTTO, A ;

BASILE, M ;

BATTISTON, R ;

BAY, A ;

BECATTINI, F ;

BECKER, U ;

BEHNER, F ;

BENCZE, GL ;

BERDUGO, J ;

BERGES, P ;

BERTUCCI, B ;

BETEV, BL ;

BIASINI, M ;

BILAND, A ;

BILEI, GM ;

BIZZARRI, R ;

BLAISING, JJ ;

BOBBINK, GJ ;

BOCK, R .

PHYSICS LETTERS B, 1995, 346 (1-2) :190-198

[8] MEASUREMENT OF CROSS-SECTIONS AND LEPTONIC FORWARD-BACKWARD ASYMMETRIES AT THE Z-POLE AND DETERMINATION OF ELECTROWEAK PARAMETERS [J].

ACCIARRI, M ;

ADAM, A ;

ADRIANI, O ;

AGUILARBENITEZ, M ;

AHLEN, S ;

ALCARAZ, J ;

ALOISIO, A ;

ALVERSON, G ;

ALVIGGI, MG ;

AMBROSI, G ;

AN, Q ;

ANDERHUB, H ;

ANDERSON, AL ;

ANDREEV, VP ;

ANGELESCU, T ;

ANTONOV, L ;

ANTREASYAN, D ;

ALKHAZOV, G ;

ARCE, P ;

AREFIEV, A ;

AZEMOON, T ;

AZIZ, T ;

BABA, PVKS ;

BAGNAIA, P ;

BAKKEN, JA ;

BAKSAY, L ;

BALL, RC ;

BANERJEE, S ;

BANICZ, K ;

BAO, J ;

BARILLERE, R ;

BARONE, L ;

BASCHIROTTO, A ;

BATTISTON, R ;

BAY, A ;

BECATTINI, F ;

BECKER, U ;

BEHNER, F ;

BENCZE, GL ;

BERDUGO, J ;

BERGES, P ;

BERTUCCI, B ;

BETEV, BL ;

BIASINI, M ;

BILAND, A ;

BILEI, GM ;

BIZZARRI, R ;

BLAISING, JJ ;

BOBBINK, GJ ;

BOCK, R .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1994, 62 (04) :551-573

[9] THE L3 SILICON MICROVERTEX DETECTOR [J].

ACCIARRI, M ;

ADAM, A ;

ADRIANI, O ;

AHLEN, S ;

ALCARAZ, J ;

AMBROSI, G ;

BABUCCI, E ;

BAKSAY, L ;

BASCHIROTTO, A ;

BATTISTON, R ;

BAUR, W ;

BAY, A ;

BENCZE, GL ;

BERTUCCI, B ;

BIASINI, M ;

BILEI, GM ;

BOBBINK, GJ ;

BOISSEVAIN, JG ;

BOSETTI, M ;

BROOKS, ML ;

BURGER, WJ ;

BUSENITZ, J ;

CAMPS, C ;

CARIA, M ;

CASTELLINI, G ;

CASTELLO, R ;

CHECCUCCL, B ;

CHEN, A ;

COAN, TE ;

COMMICHAU, V ;

DIBITONTO, D ;

DING, J ;

DUINKER, P ;

DJAMBAZOV, L ;

EASO, S ;

EXTERMANN, P ;

FIANDRINI, E ;

GABBANINI, A ;

GOLDSTEIN, J ;

GOUGAS, A ;

HANGARTER, K ;

HAUVILLER, C ;

HERVE, A ;

HOFER, M ;

HOFER, T ;

HOU, S ;

JOSA, MI ;

KAPUSTINSKY, JS ;

KIM, D ;

KINNISON, WW .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1994, 351 (2-3) :300-312

[10] The forward muon detector of L3 [J].

Adam, A ;

AguilarBenitez, M ;

Alarcon, J ;

Alberdi, J ;

Alexandrov, V ;

Aloisio, A ;

Alviggi, MG ;

Anderhub, H ;

Ariza, M ;

Azemoon, T ;

Aziz, T ;

Bakker, F ;

Banerjee, S ;

Banicz, K ;

Barcala, J ;

Becker, U ;

Berdugo, J ;

Berges, P ;

Betev, BL ;

Biland, A ;

Bobbink, GJ ;

Bock, R ;

Bohm, A ;

Borissov, V ;

Bosseler, K ;

Bouvier, P ;

Brambilla, E ;

Burger, JD ;

Burgos, C ;

Buskens, J ;

Carlier, JC ;

Carlino, G ;

Casaus, J ;

Cavallo, N ;

Cerjak, I ;

Cerrada, M ;

Chang, YH ;

Chen, HS ;

Chendvankar, SR ;

Chvatchkine, V ;

Daniel, M ;

deAsmundis, R ;

Decreuse, G ;

Deiters, K ;

Djambazov, L ;

Duraffourg, P ;

Erne, FC ;

Esser, H ;

Ezekiev, S ;

Faber, G .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1996, 383 (2-3) :342-366

← 1 2 3 4 5 →