TESTS QED AT LEP ENERGIES USING E(+)E(-)-]GAMMA-GAMMA(GAMMA) AND E(+)E(-)-]L(+)L(-)GAMMA-GAMMA

被引：36

作者：

ACCIARRI, M

ADAM, A

ADRIANI, O

AGUILARBENITEZ, M

AHLEN, S

ALPAT, B

ALCARAZ, J

ALLABY, J

ALOISIO, A

ALVERSON, G

ALVIGGI, MG

AMBROSI, G

AN, Q

ANDERHUB, H

ANDREEV, VP

ANGELESCU, T

ANTREASYAN, D

AREFIEV, A

AZEMOON, T

AZIZ, T

BABA, PVKS

BAGNAIA, P

BAKSAY, L

BALL, RC

BANERJEE, S

BANICZ, K

BARILLERE, R

BARONE, L

BARTALINI, P

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

BOHM, A

BORGIA, B

机构：

[1] RHEIN WESTFAL TH AACHEN, INST PHYS 1, D-52056 AACHEN, GERMANY

[2] RHEIN WESTFAL TH AACHEN, INST PHYS 3, D-52056 AACHEN, GERMANY

[3] NIKHEF H, 1009 DB AMSTERDAM, NETHERLANDS

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

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

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

[7] INST HIGH ENERGY PHYS, BEIJING 100039, PEOPLES R CHINA

[8] HUMBOLDT UNIV BERLIN, D-10099 BERLIN, GERMANY

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

[10] TATA INST FUNDAMENTAL RES, BOMBAY 400005, MAHARASHTRA, INDIA

[11] BOSTON UNIV, BOSTON, MA 02215 USA

[12] NORTHEASTERN UNIV, BOSTON, MA 02115 USA

[13] INST ATOM PHYS, R-76900 BUCHAREST, ROMANIA

[14] UNIV BUCHAREST, R-76900 BUCHAREST, ROMANIA

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

[16] HARVARD UNIV, CAMBRIDGE, MA 02139 USA

[17] MIT, CAMBRIDGE, MA 02139 USA

[18] IST NAZL FIS NUCL, I-50125 FLORENCE, ITALY

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

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

[21] WORLD LAB, FBLIA PROJECT, CH-1211 GENEVA 23, SWITZERLAND

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

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

[24] SEFT, HIGH ENERGY PHYS RES INST, SF-00014 HELSINKI, FINLAND

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

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

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

[28] CIEMAT, E-28040 MADRID, SPAIN

[29] IST NAZL FIS NUCL, I-20133 MILAN, ITALY

[30] INST THEORET & EXPTL PHYS, MOSCOW 117259, RUSSIA

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

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

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

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

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

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

[37] CALTECH, PASADENA, CA 91125 USA

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

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

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

[41] PRINCETON UNIV, PRINCETON, NJ 08544 USA

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

[43] UNIV ROMA LA SAPIENZA, I-00185 ROME, ITALY

[44] RUSSIAN ACAD SCI, INST NUCL PHYS, ST PETERSBURG, RUSSIA

[45] UNIV CALIF SAN DIEGO, SAN DIEGO, CA 92093 USA

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

[47] BULGARIAN ACAD SCI, CENT LAB MECHATRON & INSTRUMENTAT, BU-1113 SOFIA, BULGARIA

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

[49] UNIV ALABAMA, TUSCALOOSA, AL 35486 USA

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

来源：

PHYSICS LETTERS B | 1995年 / 353卷 / 01期

关键词：

D O I：

10.1016/0370-2693(95)00527-R

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Total and differential cross sections for the process e(+)e(-) --> gamma gamma(gamma), and the total cross section for the process e(+)e(-) --> gamma gamma gamma, are measured at energies around 91 GeV using the data collected with the L3 detector from 1991 to 1993. We set lower limits, at 95% CL, on a contact interaction energy scale parameter Lambda > 602 GeV, on the mass of an excited electron m(c)* > 146 GeV and on the QED cut-off parameters Lambda(+) > 149 GeV and Lambda(-) > 143 GeV. Upper limits are also set on the branching fractions of Z decaying into gamma gamma, pi degrees gamma and eta gamma of 5.2 x 10(-5), 5.2 x 10(-5) and 7.6 x 10(-5) respectively. The reactions e(+)e(-) --> rho(+)rho(-)n gamma (rho = e, mu, tau) are studied using the data collected from 1990 to 1994. The data are consistent with the QED expectations.

引用

页码：136 / 144

页数：9

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