MEASUREMENT OF CROSS-SECTIONS AND LEPTONIC FORWARD-BACKWARD ASYMMETRIES AT THE Z-POLE AND DETERMINATION OF ELECTROWEAK PARAMETERS

Authors
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 BOHM A BORGIA B BOURILKOV D BOURQUIN M BOUTIGNY D BOUWENS B BRAMBILLA E BRANSON JG BRIGLJEVIC V BROCK IC BROOKS M BUJAK A BURGER JD BURGER WJ BURGOS C BUSENITZ J BUYTENHUIJS A BYKOV A CAI XD CAPELL M CARIA M CARLINO G CARTACCI AM CASAUS J CASTELLO R CAVALLO N CERRADA M CESARONI F CHAMIZO M CHANG YH CHATURVEDI UK CHEMARIN M CHEN A CHEN C CHEN G CHEN GM CHEN HF CHEN HS CHEN M CHIEFARI G CHIEN CY CHOI MT CHUNG S CIVININI C CLARE I CLARE R COAN TE COHN HO COIGNET G COLINO N CONTIN A COSTANTINI S COTOROBAI F DELACRUZ B CUI XT CUI XY DAI TS DALESSANDRO R DEASMUNDIS R DEGRE A DEITERS K DENES E DENES P DENOTARISTEFANI F DIBITONTO D DIEMOZ M DIMITROV HR DIONISI C DITTMAR M DJAMBAZOV L DOVA MT DRAGO E DUCHESNEAU D DUINKER P DURAN I EASO S ELMAMOUNI H ENGLER A EPPLING FJ ERNE FC EXTERMANN P FABBRETTI R FABRE M FALCIANO S FAN SJ FAVARA A FAY J FELCINI M FERGUSON T FERNANDEZ D FERNANDEZ G FERRONI F FESEFELDT H FIANDRINI E FIELD JH FILTHAUT F FISHER PH FORCONI G FREDJ L FREUDENREICHG K FRIEBEL W FUKUSHIMA M GAILLOUD M GALAKTINOV Y GALLO E GANGULI SN GARCIAABIA P GENTILE S GHEORDANESCU N GIAGU S GOLDFARB S GONG ZF GONZALEZ E GOUGAS A GOUJON D GRATTA G GRUENEWALD MW GU C GUANZIROLI M GUO JK GUPTA VK GURTU A GUSTAFSON HR GUTAY LJ HANGARTER K HASAN A HAUSCHILDT D HE CF HE JT HEBBEKER T HEBERT M HERVE A HILGERS K HOFER H HOORANI H HOU SR HU G HU GQ LLE B ILYAS MM INNOCENTE V JANSSEN H JIN BN JONES LW JOSAMUTUBERRIA IJ KASSER A KHAN RA KAMYSHKOV Y KAPINOS P KAPUSTINSKY JS KARYOTAKIS Y KAUR M KHOKHAR S KIENZLEFOCACCI MN KIM JK KIM SC KIM YG KINNISON WW KIRKBY A KIRKBY D KIRSCH S KITTEL W KLIMENTOV A KONIG AC KOFFEMAN E KORNADT O KOUTSENKO V KOULBARDIS A KRAEMER RW KRAMER T KRASTEV VR KRENZ W KUIJTEN H KUMAR KS KUNIN A DEGUEVARA PL LANDI G LANSKE D LANZANO S LEBEDEV A LEBRUN P LECOMTE P LECOQ P LECULTRE P LEE DM LEE JS LEE KY LEEDOM I LEGGETT C LEGOFF JM LEISTE R LENTI M LEONARDI E LEVTCHENKO P LI C LI HT LI PJ LIAO JY LIN WT LIN ZY LINDE FL LINDEMANN B LISTA L LIU Y LOHMANN W LONGO E LU W LU YS LUBBERS JM LUBELSMEYER K LUCI C LUCKEY D LUDOVICI L LUMINARI L LUSTERMANN W MA JM MA WG MACDERMOTT M MALGERI L MALIK R MALININ A MANA C MAOLINBAY M MARCHESINI P MARION F MARIN A MARTIN JP MARZANO F MASSARO GG MAZUMDAR K MCBRIDE P MCMAHON T MCNALLY D MERK M MEROLA L MESCHINI M METZGER WJ MI Y MIHUL A MILLS GB MIR Y MIRABELLI G MNICH J MOLLER M MONTELEONI B MORAND R MORGANTI S MOULAI NE MOUNT R MULLER S NAGY E NAPOLITANO M NESSITEDALDI F NEWMAN H NIAZ MA NIPPE A NOAK H ORGANTINI G PANDOULAS D PAOLETTI S PAOLUCCI P PASCALE G PASSALEVA G PATRICELLI S PAUL T PAULUZZI M PAUS C PAUSS F PEI YJ PENSOTTI S PERRETGALLIX D PERRIER J PEVSNER A PICCOLO D PIERI M PINTO JC PIROUE PA PLASIL F PLYASKIN V POHL M POJIDAEV V POSTEMA H QI ZD QIAN JM QURESHI KN RAGHAVAN R RAHALCALLOT G RANCOITA PG RATTAGGI M RAVEN G RAZIS P READ K REDAELLI M REN D REN Z RESCIGNO M REUCROFT S RICKER A RIEMANN S RIEMERS BC RILES K RIND O RIZVI HA RO S ROBOHM A RODRIGUEZ FJ ROE BP ROHNER M ROHNER S ROMERO L ROSIERLEES S ROSMALEN R ROSSELET P VANROSSUM W ROTH S RUBBIA A RUBIO JA RYKACZEWSKI H SACHWITZ M SALICIO J SALICIO JM SANCHEZ E SANDERS GS SANTOCCHIA A SARAKINOS MS SARTORELLI G SASSOWSKY M SAUVAGE G SCHAFER C SCHEGELSKY V SCHMITZ D SCHMITZ P SCHNEEGANS M SCHOLZ N SCHOPPER H SCHOTANUS DJ SHOTKIN S SCHREIBER HJ SHUKLA J SCHULTE R SCHULTZE K SCHWENKE J SCHWERING G SCIACCA C SCOTT I SEHGAL R SEILER PG SENS JC SERVOLI L SHEER I SHEN DZ SHEVCHENKO S SHI XR SHUMILOV E SHOUTKO V SON D SOPCZAK A SOULIMOV V SPARTIOTIS C SPICKERMANN T SPILLANTINI P STAROSTA R STEUER M STICKLAND D STICOZZI F STONE H STRAUCH K SUDHAKAR K SULTANOV G SUN LZ SUSINNO GE SUTER H SWAIN JD SYED AA TANG XW TAYLOR L TING SCC TING SM TOKER O TONUTTI M TONWAR SC TOTH J TSAREGORODTSEV A TSIPOLITIS G TULLY C TUNG KL TUUVA T ULBRICHT J URBAN L UWER U VALENTE E VANDEWALLE RT VETLITSKY I VIERTEL G VIKAS P VIKAS U VIVARGENT M VOGEL H VOGT H VOROBIEV I VOROBYOV AA VOROBYOV AA VUILLEUMIER L WADHWA M WALLRAFF W WANG JC WANG CR WANG XL WANG YF WANG ZM WEBER A WEBER J WEILL R WENNINGER J WHITE M WILLMOTT C WITTGENSTEIN F WRIGHT D WU SX WYNHOFF S WYSLOUCH B XIE YY XU JG XU ZZ XUE ZL YAN DS YANG BZ YANG CG YANG CG YANG G YE CH YE JB YE Q YEH SC YIN ZW YOU JM YUNUS N YZERMAN M ZACCARDELLI C ZEMP P ZENG M ZENG Y ZHANG DH ZHANG ZP ZHOU B ZHOU GJ ZHOU JF ZHU RY ZICHICHI A VANDERZWAAN BCC
Citation
M. Acciarri et al., MEASUREMENT OF CROSS-SECTIONS AND LEPTONIC FORWARD-BACKWARD ASYMMETRIES AT THE Z-POLE AND DETERMINATION OF ELECTROWEAK PARAMETERS, Zeitschrift fur Physik. C, Particles and fields, 62(4), 1994, pp. 551-573
Citations number
77
Categorie Soggetti
Physics, Particles & Fields
Journal title
Zeitschrift fur Physik. C, Particles and fields → ACNP
ISSN journal
01709739
Volume
62
Issue
4
Year of publication
1994
Pages
551 - 573
Database
ISI
SICI code
0170-9739(1994)62:4<551:MOCALF>2.0.ZU;2-3
Abstract
We report on the measurement of the leptonic and hadronic cross sectio ns and leptonic forward-backward asymmetries at the Z peak with the L3 detector at LEP. The total luminosity of 40.8 pb-1 collected in the y ears 1990, 1991 and 1992 corresponds to 1.09 . 10(6) hadronic and 0.98 . 10(5) leptonic Z decays observed. These data allow us to determine the electroweak parameters. From the cross sections we derive the prop erties of the Z boson: M(Z) = 91 195 +/- 9 MeV GAMMA(Z) = 2494 +/- 10 MeV GAMMA(had) = 1748 +/- 10 MeV GAMMA(l) = 83.49 +/- 0.46 MeV, assumi ng lepton universality. We obtain an invisible width of GAMMA(inv) = 4 96.5 +/- 7.9 MeV which, in the Standard Model, corresponds to a number of light neutrino species of N(v) = 2.981 +/- 0.050. Using also the t hree leptonic forward-backward asymmetries and the average tau polariz ation, we determine the effective vector and axial-vector coupling con stants of the neutral weak current to charged leptons to be: g(V)-l = -0.0378(+0.0045/-0.0042) g(A)-l = -0.4998 +/- 0.0014 Within the framew ork of the Standard Model, and including our measurements of the Z --> bbBAR forward-backward asymmetry and partial decay width, we derive a n effective electroweak mixing angle of sin2 theta(W)BAR = 0.2326 +/- 0.0012. We obtain an estimate for the strong coupling constant, alpha( s) = 0.142 +/- 0.013, and for the top-quark mass, m(t) = 158(+32/-40) +/- 19(Higgs) GeV, where the second error arises due to the uncertaint y in the Higgs-boson mass.