A STUDY OF MUON PAIR PRODUCTION AND EVIDENCE FOR TAU PAIR PRODUCTION IN PHOTON-PHOTON COLLISIONS AT LEP

Authors
AKERS R ALEXANDER G ALLISON J ANDERSON KJ ARCELLI S ASTBURY A AXEN D AZUELOS G BAINES JTM BALL AH BANKS J BARLOW RJ BARNETT S BARTOLDUS R BATLEY JR BEAUDOIN G BECK A BECK GA BECKER J BEESTON C BEHNKE T BELL KW BELLA G BENTKOWSKI P BERLICH P BETHKE S BIEBEL O BLOODWORTH IJ BOCK P BODEN B BOSCH HM BOUTEMEUR M BREUKER H BRIGHTTHOMAS P BROWN RM BUIJS A BURCKHART HJ BURGARD C CAPILUPPI P CARNEGIE RK CARTER AA CARTER JR CHANG CY CHARLTON DG CHU SL CLARKE PEL CLAYTON JC COHEN I CONBOY JE COOPER M COUPLAND M CUFFIANI M DADO S DALLAVALLE GM DEJONG S DELPOZO LA DENG H DIECKMANN A DITTMAR M DIXIT MS SILVA EDE DUBOSCQ JE DUCHOVNI E DUCKECK G DUERDOTH IP DUMAS DJP ELCOMBE PA ESTABROOKS PG ETZION E EVANS HG FABBRI F FABBRO B FIERRO M FINCKEKEELER M FISCHER HM FONG DG FOUCHER M GAIDOT A GARY JW GASCON J GEDDES NI GEICHGIMBEL C GENSLER SW GENTIT FX GIACOMELLI G GIACOMELLI R GIBSON V GIBSON WR GILLIES JD GOLDBERG J GINGRICH DM GOODRICK MJ GORN W GRANDI C GRANT FC HAGEMANN J HANSON GG HANSROUL M HARGROVE CK HARRISON PF HART J HATTERSLEY PM HAUSCHILD M HAWKES CM HEFLIN E HEMINGWAY RJ HERTEN G HEUER RD HILL JC HILLIER SJ HILSE T HINSHAW DA HOBBS JD HOBSON PR HOCHMAN D HOMER RJ HONMA AK HUGHESJONES RE HUMBERT R IGOKEMENES P IHSSEN H IMRIE DC JANISSEN AC JAWAHERY A JEFFREYS PW JEREMIE H JIMACK M JONES M JONES RWL JOVANOVIC P JUI C KARLEN D KAWAGOE K KAWAMOTO T KEELER RK KELLOGG RG KENNEDY BW KING J KLUTH S KOBAYASHI T KOETKE DS KOKOTT TP KOMAMIYA S KRAL JF KOWALEWSKI R VONKROGH J KROLL J KYBERD P LAFFERTY GD LAFOUX H LAHMANN R LAUBER J LAYTER JG LEBLANC P LEE AM LEFEBVRE E LEHTO MH LELLOUCH D LEROY C LETTS J LEVINSON L LLOYD SL LOEBINGER FK LORAH JM LORAZO B LOSTY MJ LOU XC LUDWIG J LUIG A MANNELLI M MARCELLINI S MARKUS C MARTIN AJ MARTIN JP MASHIMO T MATTIG P MAUR U MCKENNA J MCMAHON TJ MCNUTT JR MEIJERS F MENSZNER D MERRITT FS MES H MICHELINI A MIDDLETON RP MIKENBERG G MILDENBERGER J MILLER DJ MIR R MOHR W MOISAN C MONTANARI A MORI T MORI M MULLER U NELLEN B NGUYEN HH ONEALE SW OAKHAM FG ODORICI F OGREN HO ORAM CJ OREGLIA MJ ORITO S PANSART JP PANZERSTEINDEL B PASCHIEVICI P PATRICK GN PAZJAOSHVILI N PEARCE MJ PFISTER P PILCHER JE PINFOLD J PITMAN D PLANE DE POFFENBERGER P POLI B PRITCHARD TW PRZYSIEZNIAK H QUAST G REDMOND MW REES DL RICHARDS GE RISON M ROBINS SA ROBINSON D ROLLNIK A RONEY JM ROS E ROSSBERG S ROSSI AM ROSVICK M ROUTENBURG P RUNGE K RUNOLFSSON O RUST DR SASAKI M SBARRA C SCHAILE AD SCHAILE O SCHAPPERT W SCHARF F SCHARFFHANSEN P SCHENK P SCHMITT B VONDERSCHMITT H SCHRODER M SCHWICK C SCHWIENING J SCOTT WG SETTLES M SHEARS TG SHEN BC SHEPHERDTHEMISTOCLEOUS CH SHERWOOD P SIROLI GP SKILLMAN A SKUJA A SMITH AM SMITH TJ SNOW GA SOBIE R SPRINGER RW SPROSTON M STAHL A STEGMANN C STEPHENS K STEUERER J STROHMER R STROM D TAKEDA H TAKESHITA T TAREM S TECCHIO M TEIXEIRADIAS P TESCH N THOMSON MA TORRENTELUJAN E TOWERS S TRANSTROMER G TRESILIAN NJ TSUKAMOTO T TURNER MF VANDENPLAS D VANKOOTEN R VANDALEN GJ VASSEUR G WAGNER A WAGNER DL WAHL C WARD CP WARD DR WATKINS PM WATSON AT WATSON NK WEBER M WEBER P WELLS PS WERMES N WHALLEY MA WILKENS B WILSON GW WILSON JA WINTERER VH WLODEK T WOLF G WOTTON S WYATT TR YAARI R YEAMAN A YEKUTIELI G YURKO M ZEUNER W ZORN GT
Citation
R. Akers et al., A STUDY OF MUON PAIR PRODUCTION AND EVIDENCE FOR TAU PAIR PRODUCTION IN PHOTON-PHOTON COLLISIONS AT LEP, Zeitschrift fur Physik. C, Particles and fields, 60(4), 1993, pp. 593-600
Citations number
22
Categorie Soggetti
Physics, Particles & Fields
Journal title
Zeitschrift fur Physik. C, Particles and fields → ACNP
ISSN journal
01709739
Volume
60
Issue
4
Year of publication
1993
Pages
593 - 600
Database
ISI
SICI code
0170-9739(1993)60:4<593:ASOMPP>2.0.ZU;2-N
Abstract
We have studied the reactions gammagamma --> mu+mu- and gammagamma --> tau+tau- by measuring the properties of events of the types e+e- --> e+e-mu+mu- and e+e- --> e+e-tau+tau- at e+e- centre-of-mass energies b etween 88 and 94 GeV. The data sample corresponds to an integrated e+e - luminosity of 40.4 pb-1 collected by the OPAL detector at LEP. The Q ED structure function F2 is extracted from a sample of 1462 gammagamma --> mu+mu- events in which one photon is off the mass shell (single-t agged). The Q2 range for these massive photons is 4-400 GeV2, with an average Q2 of 8 GeV2. We have observed 48 e+e- --> e+e-mu+mu- events i n which both final state electrons are detected. In the sample of sing le-tag events we have identified 34.9 +/- 6.7 events as due to the rea ction gammagamma --> tau+tau-, on an estimated background of 5.1 +/- 2 .7 events. In all cases the measured event distributions agree with QE D calculations.