OBSERVATION OF MULTIPLE HARD PHOTON FINAL-STATES AT ROOT-S=130-140 GEV AT LEP

Authors
ACCIARRI M ADAM A ADRIANI O AGUILARBENITEZ M AHLEN S ALPAT B ALCARAZ J ALEMANNI G ALLABY J ALOISIO A ALVERSON G ALVIGGI MG AMBROSI G ANDERHUB H ANDREEV VP ANGELESCU T ANTREASYAN D AREFIEV A AZEMOON T AZIZ T 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 BERDUGO J BERGES P BERTUCCI B BETEV BL BIASINI M BILAND A BILEI GM BLAISING JJ BLYTH SC BOBBINK GJ BOCK R BOHM A BORGIA B BOUCHAM A BOURILKOV D BOURQUIN M BRAMBILLA E BRANSON JG BRIGLJEVIC V BROCK IC BUIJS A BUJAK A BURGER JD BURGER WJ BUSENITZ J BUYTENHUIJS A CAI XD CAMPANELLI M CAPELL M ROMEO GC CARIA M CARLINO G CARTACCI AM CASAUS J CASTELLINI G CASTELLO R CAVALLARI F CAVALLO N CECCHI C CERRADA M CESARONI F CHAMIZO M CHAN A CHANG YH CHATURVEDI UK CHEMARIN M CHEN A CHEN G CHAN GM CHEN HF CHEN HS CHEREAU X CHIEFARI G CHIEN CY CHOI MT 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 DAI TS DALESSANDRO R DEASMUNDIS R DEBOECK H 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 FELCINI M FURETTA C FERGUSON T FERNANDEZ D FERRONI F FESEFELDT H FIANDRINI E FIELD JH FILTHAUT F FISHER PH FORCONI G FREDJ L FREUDENREICH K GALAKTIONOV Y GANGULI SN 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 HANGARTER K HARTMANN B HASAN A HEBBEKER T HERVE A VANHOEK WC HOFER H HOORANI H HOU SR HU G ILYAS MM INNOCENTE V JANSSEN H JIN BN JONES LW DEJONG P JOSAMUTUBERRIA I KASSER A KHAN RA KAMYSHKOV Y KAPINOS P KAPUSTINSKY JS KARYOTAKIS Y KAUR M KIENZLEFOCACCI MN KIM D KIM JK KIM SC KIM YG KINNISON WW KIRBY A KIRBY D KIRBY J KITTEL W KLIMENTOV A KONIG AC KONGETER A KOROLKO I KOUTSENKO V KOULBARDIS A KRAEMER RW KRAMER T KRENZ W KUIJTEN H KUNIN A DEGUEVARA P LANDI G LAPOINT C LASSILAPERINI K LEBEAU M LEBEDEV A LEBRUN P LECOMTE P LECOQ P LECOULTRE P LEE JS LEE KY LEGOFF JM LEISTE R LENTI M LEONARDI E LEVTCHENKO P LI C LIEB E LIN WT LINDE FL LINDEMANN B LISTA L LIU ZA LOHMANN W LONGO E LU W LU YS LUBELSMEYER K LUCI C LUCKEY D LUDOVICI L LUMINARI L LUSTERMANN W MA WG MACCHIOLO A MAITY M MAJUMDER G MALGERI L MALININ A MANA C MANGLA S MARCHESINI P MARIN A MARTIN JP MARZANO F MASSARO GGG MAZUMDAR K MCNALLY D MCNEIL RR MELE S MEROLA L MESCHINI M METZGER WJ VONDERMEY M MI Y MIHUL A VANMIL AJW MIRABELLI G MNICH J MOLLER M MONTELEONI B MOORE R MORGANTI S MOUNT R MULLER S MUHEIM F NAGY E NAHN S NAPOLITANO M NESSITEDALDI F NEWMAN H NIPPE A NOWAK H ORGANTINI G OSTONEN R PANDOULAS D PAOLETTI S PAOLUCCI P PARK HK PASCALE G PASSALEVA G PATRICELLI S PAUL T PAULUZZI M PAUS C PAUSS F PEACH D PEI YJ PENSOTTI S PERRETGALLIX D PETRAK S PEVSNER A PICCOLO D PIERI M PINTO JC PIROUE PA PISTOLESI E PLYASKIN V POHL M POJIDAEV V POSTEMA H PRODUIT N RAGHAVAN R RAHALCALLOT G RANCOITA PG RATTAGGI M RAVEN G RAZIS P READ K REN D RESCIGNO M REUCROFT S VANRHEE T RICKER A RIEMANN S RIEMERS BC RILES K RO S ROBOHM A RODIN J RODRIGUEZ FJ ROE BP ROHNER S ROMERO L ROSIERLEES S ROSSELET P VANROSSUM W ROTH S RUBIO JA RYKACZEWSKI H SALICIO J SANCHEZ E SANTOCCHIA A SARAKINOS ME SARKAR S SASSOWSKY M SCHAFER C SCHEGELSKY V SCHMIDTKAERST S SCHMITZ D SCHMITZ P SCHNEEGANS M SCHOENEICH B SCHOLZ N SCHOPPER H SCHOTANUS DJ SCHULTE R SCHULTZE K SCHWENKE J SCHWERING G SCIACCA C SCIARRINO D SENS JC SERVOLI L SHEVCHENKO S SHIVAROV N SHOUTKO V SHUKLA J SHUMILOV E SIEDENBURG T SON D SOPCZAK A SMITH B SPILLANTINI P STEUER M STICKLAND DP STICOZZI F 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 TOKER O TONISCH F TONUTTI M TONWAR SC TOTH J TSAREGORODTSEV A TULLY C TUCHSCHERER H TUNG KL ULBRICHT J UWER U VALENTE E VANDEWALLE RT VETLITSKY I VIERTEL G VIVARGENT M VOLKERT R VOGEL H VOGT H VOROBIEV I VOROBYOV AA VOROBYOV AA VORVOLAKOS A WADHWA M WALLRAFF W WANG JC WANG XL WANG YF 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 ZACCARDELLI C ZALITE A ZEMP P ZENG Y ZHANG ZP ZHOU B ZHOU Y ZHU GY ZHU RY ZICHICHI A
Citation
M. Acciarri et al., OBSERVATION OF MULTIPLE HARD PHOTON FINAL-STATES AT ROOT-S=130-140 GEV AT LEP, Physics letters. Section B, 384(1-4), 1996, pp. 323-332
Citations number
25
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
384
Issue
1-4
Year of publication
1996
Pages
323 - 332
Database
ISI
SICI code
0370-2693(1996)384:1-4<323:OOMHPF>2.0.ZU;2-9
Abstract
We have studied the process e(+)e(-)-->n gamma (n greater than or equa l to 2) at an average center-of-mass energy of 133 GeV using the L3 de tector at LEP. For an integrated luminosity of 4.95 pb(-1) we find one gamma gamma gamma gamma(gamma) final state with only hard photons. Th e rates of both gamma gamma gamma and gamma gamma events are consisten t with QED expectations. The cross section of the reaction e(+)e(-) -- >gamma gamma(gamma) in the polar range 16 degrees<theta(gamma)<164 deg rees is measured to be 22.6+/-2.2 ph. Decays into photons of narrow sc alar resonances with masses between 90 and 130 GeV are not observed. T he observation of the event with four energetic photons is consistent with QED although the kinematic configuration of the photons is atypic al.