STUDY OF HADRONIC EVENTS AND MEASUREMENTS OF ALPHA(S) BETWEEN 30 AND 91 GEV

Authors
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 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 BOUCHAM A BOURILKOV D BOURQUIN M BOUTIGNY D BRACCINI S BRANSON JG BRIGLJEVIC V BROCK IC BUFFINI A BUIJS A BURGER JD BURGER WJ BUSENITZ J CAI XD CAMPANELLI M CAPELL M ROMEO GC CARLINO G CARTACCI AM CASAUS J CASTELLINI G CAVALLARI F CAVALLO N CECCHI C CERRADA M CESARONI F CHAMIZO M CHANG YH CHATURVEDI UK CHEKANOV SV CHEMARIN M CHEN A CHEN G CHEN GM CHEN HF CHEN HS CHEN M CHIEFARI G CHIEN CY CIFARELLI L CINDOLO F CIVININI C CLARE I CLARE R COHN HO COIGNET G COLIJN AP COLINO N COMMICHAU V COSTANTINI S COTOROBAI F DELACRUZ B CSILLING A DAI TS DALESSANDRO R DEASMUNDIS R DEGRE A DEITERS K DENES P DENOTARISTEFANI F DIBITONTO D DIEMOZ M VANDIERENDONCK D DILODOVICO F DIONISI C DITTMAR M DOMINGUEZ A DORIA A DORNE I DOVA MT DRAGO E DUCHESNEAU D DUINKER P DURAN I DUTTA S EASO S EFREMENKO Y ELMAMOUNI H ENGLER A EPPLING FJ ERNE FC ERNENWEIN JP EXTERMANN P FABRE M FACCINI R FALCIANO S FAVARA A FAY J FEDIN O FELCINI M FENYI B FERGUSON T FERRONI F FESEFELDT H FIANDRINI E FIELD JH FILTHAUT F FISHER PH FISK I FORCONI G FREDJ L FREUDENREICH K FURETTA C GALAKTIONOV Y GANGULI SN GARCIAABIA P GAU SS GENTILE S GERALD J GHEORDANESCU N GIAGU S GOLDFARB S GOLDSTEIN J GONG ZF GOUGAS A GRATTA G GRUENEWALD MW GUPTA VK GURTU A GUTAY LJ HARTMANN B HASAN A HATZIFOTIADOU D HEBBEKER T HERVE A VANHOEK WC HOFER H HONG SJ HOORANI H HOU SR HU G INNOCENTE V JANSSEN H JENKES K JIN BN JONES LW DEJONG P JOSAMUTUBERRIA I KASSER A KHAN RA KAMRAD D KAMYSHKOV Y KAPUSTINSKY JS KARYOTAKIS Y KAUR M KIENZLEFOCACCI MN KIM D KIM DH KIM JK KIM SC KIM YG KINNISON WW KIRKBY A KIRKBY D KIRKBY J KISS D KITTEL W KLIMENTOV A KONIG AC KOPP A KOROLKO I KOUTSENKO V KRAEMER RW KRENZ W KUNIN A DEGUEVARA PL LANDI G LAPOINT C LASSILAPERINI K LAURIKAINEN P LEBEAU M LEBEDEV A LEBRUN P LECOMTE P LECOQ P LECOULTRE P LEGGETT C LEGOFF JM LEISTE R LEONARDI E LEVTCHENKO P LI C LIN CH LIN WT LINDE FL LISTA L LIU ZA LOHMANN W LONGO E LU W LU YS LUBELSMEYER K LUCI C LUCKEY D LUMINARI L LUSTERMANN W MA WG MAITY M MAJUMDER G MALGERI L MALININ A MANA C MANGEOL D MANGLA S MARCHESINI P MARIN A MARTIN JP MARZANO F MASSARO GGG MCNALLY D MELE S MEROLA L MESCHINI M METZGER WJ VONDERMEY M MI Y MIHUL A VANMIL AJW MIRABELLI G MNICH J MOLNAR P MONTELEONI B MOORE R MORGANTI S MOULIK T MOUNT R MULLER S MUHEIM F MUIJS AJM NAHN S NAPOLITANO M NESSITEDALDI F NEWMAN H NIESSEN T NIPPE A NISATI A NOWAK H OH YD OPITZ H ORGANTINI G OSTONEN R PALOMARES C PANDOULAS D PAOLETTI S PAOLUCCI P PARK HK PARK LH PASCALE G PASSALEVA G PATRICELLI S PAUL T PAULUZZI M PAUS C PAUSS F PEACH D PEI YJ PENSOTTI S PERRETGALLIX D PETERSEN B PETRAK S PEVSNER A PICCOLO D PIERI M PINTO JC PIROUE PA PISTOLESI E PLYASKIN V POHL M POJIDAEV V POSTEMA H PRODUIT N PROKOFIEV D RAHALCALLOT G RAJA N RANCOITA PG RATTAGGI M RAVEN G RAZIS P READ K REN D RESCIGNO M REUCROFT S VANRHEE T RIEMANN S RILES K RIND O ROBOHM A RODIN J ROE BP ROMERO L ROSIERLEES S ROSSELET P VANROSSUM W ROTH S RUBIO JA RUSCHMEIER D RYKACZEWSKI H SALICIO J SANCHEZ E SANDERS MP SARAKINOS ME SARKAR S SASSOWSKY M SAUVAGE G SCHAFER C SCHEGELSKY V SCHMIDTKAERST S SCHMITZ D SCHMITZ P SCHNEEGANS M SCHOLZ N SCHOPPER H SCHOTANUS DJ SCHWENKE J SCHWERING G SCIACCA C SCIARRINO D SERVOLI L SHEVCHENKO S SHIVAROV N SHOUTKO V SHUKLA J SHUMILOV E SHVOROB A SIEDENBURG T SON D SOPCZAK A SOULIMOV V SMITH B SPILLANTINI P STEUER M STICKLAND DP STONE H STOYANOV B STRAESSNER A STRAUCH K SUDHAKAR K SULTANOV G SUN LZ SUSINNO GF SUTER H SWAIN JD TANG XW TAUSCHER L TAYLOR L TING SCC TING SM TONUTTI M TONWAR SC TOTH J TULLY C TUCHSCHERER H TUNG KL UCHIDA Y ULBRICHT J UWER U VALENTE E VANDEWALLE RT VESZTERGOMBI G VETLITSKY I VIERTEL G VIVARGENT M VOLKERT R VOGEL H VOGT H VOROBIEV I VOROBYOV AA VORVOLAKOS A WADHWA M WALLRAFF W WANG JC WANG XL WANG ZM WEBER A WITTGENSTEIN F WU SX WYNHOFF S XU J XU ZZ YANG BZ YANG CG YAO XY YE JB YEH SC YOU JM ZALITE A ZALITE Y ZEMP P ZENG Y ZHANG Z ZHANG ZP ZHOU B ZHOU Y ZHU GY ZHU RY ZICHICHI A ZIEGLER F
Citation
M. Acciarri et al., STUDY OF HADRONIC EVENTS AND MEASUREMENTS OF ALPHA(S) BETWEEN 30 AND 91 GEV, Physics letters. Section B, 411(3-4), 1997, pp. 339-353
Citations number
46
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
411
Issue
3-4
Year of publication
1997
Pages
339 - 353
Database
ISI
SICI code
0370-2693(1997)411:3-4<339:SOHEAM>2.0.ZU;2-O
Abstract
We have studied the structure of hadronic events with a hard, isolated photon in the final state (e(+)e(-) --> Z --> hadrons + gamma) in the 3.6 million hadronic events collected with the L3 detector at centre- of-mass energies around 91 GeV. The centre-of-mass energy of the hadro nic system is in the range 30 GeV to 86 GeV. Event shape variables hav e been measured at these reduced centre-of-mass energies and have been compared with the predictions of different QCD Monte Carlo programs. The event shape variables and the energy dependence of their mean valu es are well reproduced by QCD models. We fit distributions of several global event shape variables to resummed O/alpha(s)(2)/calculations to determine the strong coupling constant a, over a wide range of energi es. We find that the strong coupling constant alpha(s) decreases with increasing energy, as expected from QCD. (C) 1997 Elsevier Science B.V .