A study of the reaction e(+)e(-)->mu(+)mu(-)gamma(ISR) at LEP and search for new physics at annihilation energies near 80 GeV

被引：10

作者：

Abreu, P

Adam, W

Adye, T

Ajinenko, I

Alekseev, GD

Alemany, R

Allport, PP

Almehed, S

Amaldi, U

Amato, S

Andersson, P

Andreazza, A

Antilogus, P

Apel, WD

Asman, B

Augustin, JE

Augustinus, A

Baillon, P

Bambade, P

Barao, F

Barbi, M

Barbiellini, G

Bardin, DY

Barker, G

Baroncelli, A

Barring, O

Bates, MJ

Battaglia, M

Baubillier, M

Baudot, J

Becks, KH

Begalli, M

Beilliere, P

Belokopytov, Y

Belous, K

Benvenuti, AC

Berggren, M

Bertini, D

Bertrand, D

Besancon, M

Bianchi, F

Bigi, M

Bilenky, MS

Billoir, P

Bizouard, MA

Bloch, D

Blume, M

Bonesini, M

Bonivento, W

Booth, PSL

机构：

[1] IOWA STATE UNIV,DEPT PHYS & ASTRON,AMES,IA 50011

[2] UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM

[3] FREE UNIV BRUSSELS,IIHE,B-1050 BRUSSELS,BELGIUM

[4] UNIV MONS,FAC SCI,B-7000 MONS,BELGIUM

[5] UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE

[6] UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY

[7] UNIV BOLOGNA,DIPARTMENTO FIS,I-40126 BOLOGNA,ITALY

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

[9] CTR BRASILEIRO PESQUISAS FIS,BR-22290 RIO JANEIRO,BRAZIL

[10] PONTIFICIA UNIV CATOLICA RIO DE JANEIRO,DEPT FIS,BR-22453 RIO JANEIRO,BRAZIL

[11] UNIV FED RIO DE JANEIRO,INST FIS,RIO JANEIRO,BRAZIL

[12] COMENIUS UNIV BRATISLAVA,FAC MATH & PHYS,SK-84215 BRATISLAVA,SLOVAKIA

[13] COLL FRANCE,PHYS CORPUSCULAIRE LAB,IN2P3,CNRS,F-75231 PARIS 05,FRANCE

[14] CERN,CH-1211 GENEVA 23,SWITZERLAND

[15] ULP,CTR RECH NUCL,IN2P3,CNRS,F-67037 STRASBOURG,FRANCE

[16] NCSR DEMOKRITOS,INST NUCL PHYS,GR-15310 ATHENS,GREECE

[17] ACAD SCI CZECH REPUBL,INST PHYS,FZU,DIV HIGH ENERGY PHYS,CZ-18040 PRAGUE 8,CZECH REPUBLIC

[18] UNIV GENOA,DIPARTIMENTO FIS,I-16146 GENOA,ITALY

[19] IST NAZL FIS NUCL,I-16146 GENOA,ITALY

[20] UNIV GRENOBLE 1,CNRS,IN2P3,INST NUCL SCI,F-38026 GRENOBLE,FRANCE

[21] HELSINKI INST PHYS,FIN-00014 HELSINKI,FINLAND

[22] JOINT INST NUCL RES DUBNA,MOSCOW 101000,RUSSIA

[23] UNIV KARLSRUHE,INST EXPT KERNPHYS,D-76128 KARLSRUHE,GERMANY

[24] INST NUCL PHYS,PL-30055 KRAKOW,POLAND

[25] STANISLAW STASZIC UNIV MIN & MET,PL-30055 KRAKOW,POLAND

[26] UNIV PARIS 11,ACCELERATEUR LINEAIRE LAB,IN2P3,CNRS,F-91405 ORSAY,FRANCE

[27] UNIV LANCASTER,SCH PHYS & CHEM,LANCASTER LA1 4YB,ENGLAND

[28] INST SUPER TECN,LIP,FCUL,P-1000 LISBON,PORTUGAL

[29] UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND

[30] UNIV PARIS 06,LPNHE,IN2P3,CNRS,F-75252 PARIS 05,FRANCE

[31] UNIV PARIS 07,F-75252 PARIS 05,FRANCE

[32] LUND UNIV,DEPT PHYS,S-22363 LUND,SWEDEN

[33] UNIV LYON 1,IPNL,IN2P3,CNRS,F-69622 VILLEURBANNE,FRANCE

[34] UNIV AIX MARSEILLE 2,CPP,IN2P3,CNRS,F-13288 MARSEILLE 09,FRANCE

[35] UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY

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

[37] NIELS BOHR INST,DK-2100 COPENHAGEN 0,DENMARK

[38] CHARLES UNIV,NUCL CTR,MFF,CR-18000 PRAGUE 8,CZECH REPUBLIC

[39] NIKHEF H,NL-1009 DB AMSTERDAM,NETHERLANDS

[40] NATL TECH UNIV ATHENS,DEPT PHYS,GR-15773 ATHENS,GREECE

[41] UNIV OSLO,DEPT PHYS,N-1000 OSLO 3,NORWAY

[42] UNIV OVIEDO,DEPT FIS,E-33007 OVIEDO,SPAIN

[43] UNIV OXFORD,DEPT PHYS,OXFORD OX1 3RH,ENGLAND

[44] UNIV PADUA,DIPARTIMENTO FIS,I-35131 PADUA,ITALY

[45] IST NAZL FIS NUCL,I-35131 PADUA,ITALY

[46] RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND

[47] UNIV ROMA TOR VERGATA,DIPARTIMENTO FIS,I-00173 ROME,ITALY

[48] IST NAZL FIS NUCL,I-00173 ROME,ITALY

[49] CTR ETUD SACLAY,CEA,DAPNIA,SERV PHYS PARTICULES,F-91191 GIF SUR YVETTE,FRANCE

[50] UNIV CANTABRIA,CSIC,INST FIS CANTABRIA,SANTANDER 39006,SPAIN

来源：

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1997年 / 75卷 / 04期

关键词：

D O I：

10.1007/s002880050504

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

A study of the channel e(+)e(-) --> mu(+)mu(-)gamma ISR, where gamma ISR is an initial state radiation photon, is presented using data collected by the DELPHI experiment from 1991 to 1994. The total cross-section at effective annihilation: energies (root s') below the Z(0) peak is obtained by using the events with relatively hard initial state radiative photon(s) (E gamma > 1 GeV). The differential cross-section as a function of the muon polar production angle is also determined in order eo extract the forward-backward asymmetries for the reaction e(+)e(-) --> mu(+)mu(-) at energies root s' between 20 and 87 GeV. The ratio of the helicity cross-sections sigma LL+sigma RR/sigma RL+sigma LR, where the two subscripts stand for the helicities of the incoming e(-) and outgoing mu(-) respectively, is extracted from the differential cross-sections in order to test the Standard Model and to look for new physics near 80 GeV. No deviations from the Standard Model were found.

引用

页码：581 / 592

页数：12

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