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Titolo:
SEARCH FOR HIGH-MASS PHOTON PAIRS IN E--]F(F)OVERBAR-GAMMA-GAMMA (F =E, MU,TAU, NU, Q) AT LEP(E)
Autore:
BUSKULIC D; DEBONIS I; DECAMP D; GHEZ P; GOY C; LEES JP; MINARD MN; PIETRZYK B; ALEMANY R; ARIZTIZABAL F; COMAS P; CRESPO JM; DELFINO M; FERNANDEZ E; FERNANDEZBOSMAN M; GAITAN V; GARRIDO L; MATTISON T; PACHECO A; PADILLA C; PASCUAL A; CREANZA D; DEPALMA M; FARILLA A; IASELLI G; MAGGI G; NATALI S; NUZZO S; QUATTROMINI M; RANIERI A; RASO G; ROMANO F; RUGGIERI F; SELVAGGI G; SILVESTRIS L; TEMPESTA P; ZITO G; CHAI Y; HU H; HUANG D; HUANG X; LIN J; WANG T; XIE Y; XU D; XU R; ZHANG J; ZHANG L; ZHAO W; BLUCHER E; BONVICINI G; BOUDREAU J; CASPER D; DREVERMANN H; FORTY RW; GANIS G; GAY C; HAGELBERG R; HARVEY J; HAYWOOD S; HILGART J; JACOBSEN R; JOST B; KNOBLOCH J; LEHRAUS I; LOHSE T; MAGGI M; MARKOU C; MARTINEZ M; MATO P; MEINHARD H; MINTEN A; MIOTTO A; MIQUEL R; MOSER HG; PALAZZI P; PATER JR; PERLAS JA; PUSZTASZERI JF; RANJARD F; REDLINGER G; ROLANDI L; ROTHBERG J; RUAN T; SAICH M; SCHLATTER D; SCHMELLING M; SEFKOW F; TEJESSY W; VEENHOF R; WACHSMUTH H; WIEDENMANN W; WILDISH T; WITZELING W; WOTSCHACK J; AJALTOUNI Z; BADAUD F; BARDADINOTWINOWSKA M; ELFELLOUS R; FALVARD A; GAY P; GUICHENEY C; HENRARD P; JOUSSET J; MICHEL B; MONTRET JC; PALLIN D; PERRET P; PODLYSKI F; PRORIOL J; PRULHIERE F; SAADI F; FEARNLEY T; HANSEN JD; HANSEN JR; HANSEN PH; MOLLERUD R; NILSSON BS; EFTHYMIOPOULOS I; KYRIAKIS A; SIMOPOULOU E; VAYAKI A; ZACHARIADOU K; BADIER J; BLONDEL A; BONNEAUD G; BRIENT JC; FOUQUE G; ORTEU S; ROUGE A; RUMPF M; TANAKA R; VERDERI M; VIDEAU H; CANDLIN DJ; PARSONS MI; VEITCH E; FOCARDI E; MONETA L; PARRINI G; CORDEN M; GEORGIOPOULOS C; IKEDA M; LANNUTTI J; LEVINTHAL D; SAWYER L; WASSERBAECH S; ANTONELLI A; BALDINI R; BENCIVENNI G; BOLOGNA G; BOSSI F; CAMPANA P; CAPON G; CERUTTI F; CHIARELLA V; DETTORREPIAZZOLI B; FELICI G; LAURELLI P; MANNOCCHI G; MURTAS F; MURTAS GP; PASSALACQUA L; PEPEALTARELLI M; PICCHI P; COLRAIN P; TENHAVE I; LYNCH JG; MAITLAND W; MORTON WT; RAINE C; REEVES P; SCARR JM; SMITH K; SMITH MG; THOMPSON AS; TURNBULL RM; BRANDL B; BRAUN O; GEWENIGER C; HANKE P; HEPP V; KLUGE EE; MAUMARY Y; PUTZER A; RENSCH B; STAHL A; TITTEL K; WUNSCH M; BEUSELINCK R; BINNIE DM; CAMERON W; CATTANEO M; COLLING DJ; DORNAN PJ; GREENE AM; HASSARD JF; LIESKE NM; MOUTOUSSI A; NASH J; PATTON S; PAYNE DG; PHILLIPS MJ; SANMARTIN G; SEDGBEER JK; TOMALIN IR; WRIGHT AG; GIRTLER P; KNERINGER E; KUHN D; RUDOLPH G; BOWDERY CK; BRODBECK TJ; FINCH AJ; FOSTER F; HUGHES G; JACKSON D; KEEMER NR; NUTTALL M; PATEL A; SLOAN T; SNOW SW; WHELAN EP; KLEINKNECHT K; RAAB J; RENK B; SANDER HG; SCHMIDT H; STEEG F; WALTHER SM; WANKE R; WOLF B; BENCHEIKH AM; BENCHOUK C; BONISSENT A; CARR J; COYLE P; DRINKARD J; ETIENNE F; NICOD D; PAPALEXIOU S; PAYRE P; ROOS L; ROUSSEAU D; SCHWEMLING P; TALBY M; ADLUNG S; ASSMANN R; BAUER C; BLUM W; BROWN D; CATTANEO P; DEHNING B; DIETL H; DYDAK F; FRANK M; HALLEY AW; JACOBS K; LAUBER J; LUTJENS G; LUTZ G; MANNER W; RICHTER R; SCHRODER J; SCHWARZ AS; SETTLES R; SEYWERD H; STIERLIN U; STIEGLER U; STDENIS R; WOLF G; BOUCROT J; CALLOT O; CORDIER A; DAVIER M; DUFLOT L; GRIVAZ JF; HEUSSE P; JAFFE DE; JANOT P; KIM DW; LEDIBERDER F; LEFRANCOIS J; LUTZ AM; SCHUNE MH; VEILLET JJ; VIDEAU I; ZHANG Z; ABBANEO D; BAGLIESI G; BATIGNANI G; BOTTIGLI U; BOZZI C; CALDERINI G; CARPINELLI M; CIOCCI MA; DELLORSO R; FERRANTE I; FIDECARO F; FOA L; FORTI F; GIASSI A; GIORGI MA; GREGORIO A; LIGABUE F; LUSIANI A; MANNELLI EB; MARROCCHESI PS; MESSINEO A; PALLA F; RIZZO G; SANGUINETTI G; SPAGNOLO P; STEINBERGER J; TENCHINI R; TONELLI G; TRIGGIANI G; VANNINI C; VENTURI A; VERDINI PG; WALSH J; BETTERIDGE AP; CARTER JM; GAO Y; GREEN MG; MARCH PV; MIR LM; MEDCALF T; QUAZI IS; STRONG JA; WEST LR; BOTTERILL DR; CLIFFT RW; EDGECOCK TR; EDWARDS M; FISHER SM; JONES TJ; NORTON PR; SALMON DP; THOMPSON JC; BLOCHDEVAUX B; COLAS P; DUARTE H; EMERY S; KOZANECKI W; LANCON E; LEMAIRE MC; LOCCI E; MARX B; PEREZ P; RANDER J; RENARDY JF; ROSOWSKY A; ROUSSARIE A; SCHULLER JP; SCHWINDLING J; SIMOHAND D; VALLAGE B; JOHNSON RP; LITKE AM; TAYLOR G; WEAR J; ASHMAN JG; BABBAGE W; BOOTH CN; BUTTAR C; CARTWRIGHT S; COMBLEY F; DAWSON I; THOMPSON LF; BARBERIO E; BOHRER A; BRANDT S; COWAN G; GRUPEN C; LUTTERS G; RIVERA F; SCHAFER U; SMOLIK L; BOSISIO L; DELLAMARINA R; GIANNINI G; GOBBO B; RAGUSA F; BELLANTONI L; CHEN W; CINABRO D; CONWAY JS; COWEN DF; FENG Z; FERGUSON DPS; GAO YS; GRAHL J; HARTON JL; JARED RC; LECLAIRE BW; LISHKA C; PAN YB; SAADI Y; SCHMITT M; SHARMA V; SHI ZH; WALSH AM; WEBER FV; WU SL; WU X; ZHENG M; ZOBERNIG G;
Indirizzi:
IN2P3,CNRS,LAPP F-74019 ANNECY LE VIEUX FRANCE UNIV AUTONOMA BARCELONA,INST FIS ALTES ENERGIES E-08193 BARCELONA SPAIN UNIV BARI,INFN,SEZIONE BARI I-70126 BARI ITALY UNIV BARI,DIPARTIMENTO FIS I-70126 BARI ITALY CHINESE ACAD SCI,INST HIGH ENERGY PHYS BEIJING PEOPLES R CHINA CERN,EUROPEAN LAB PARTICLE PHYS CH-1211 GENEVA 23 SWITZERLAND UNIV CLERMONT FERRAND,IN2P3,CNRS,PHYS CORPUSCULAIRE LAB F-63177 CLERMONT FERRAND FRANCE NIELS BOHR INST DK-2100 COPENHAGEN DENMARK DEMOCRITOS NUCL RES CTR ATHENS GREECE ECOLE POLYTECH,IN2P3,CNRS,PHYS & HAUTES ENERGIES LAB F-91128 PALAISEAU FRANCE UNIV EDINBURGH,DEPT PHYS EDINBURGH EH9 3JZ MIDLOTHIAN SCOTLAND UNIV FLORENCE,DIPARTIMENTO FIS,INFN SEZIONE FIRENZE I-50125 FLORENCE ITALY FLORIDA STATE UNIV,SUPERCOMPUTER COMPUTAT RES INST TALLAHASSEE FL 32306 FLORIDA STATE UNIV,DEPT PHYS TALLAHASSEE FL 32306 INFN,LNF I-00044 FRASCATI ITALY UNIV GLASGOW,DEPT PHYS & ASTRON GLASGOW G12 8QQ SCOTLAND UNIV HEIDELBERG,INST HOCHENERGIEPHYS W-6900 HEIDELBERG GERMANY UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,DEPT PHYS LONDON SW7 2BZ ENGLAND INNSBRUCK UNIV,INST EXPTL PHYS A-6020 INNSBRUCK AUSTRIA UNIV LANCASTER,DEPT PHYS LANCASTER LA1 4YB ENGLAND UNIV MAINZ,INST PHYS W-6500 MAINZ GERMANY FAC SCI LUMINY,IN2P3,CNRS,CTR PHYS PARTICULES F-13288 MARSEILLE FRANCE MAX PLANCK INST PHYS & ASTROPHYS,WERNER HEISENBERG INST W-8000 MUNICHGERMANY UNIV PARIS 11,IN2P3,CNRS,ACCELERATEUR LINEAIRE LAB F-91405 ORSAY FRANCE UNIV PISA,INFN,SEZIONE PISA,DIPARTIMENTO FIS I-56010 PISA ITALY SCUOLA NORMALE SUPER PISA I-56010 PISA ITALY UNIV LONDON,ROYAL HOLLOWAY & BEDFORD NEW COLL,DEPT PHYS SURREY TW20 0EX ENGLAND RUTHERFORD APPLETON LAB,DEPT PARTICLE PHYS DIDCOT OX11 0QX OXON ENGLAND CE SACLAY,PAPNIA,SERV PHYS PARTICULES F-91191 GIF SUR YVETTE FRANCE UNIV CALIF SANTA CRUZ,INST PARTICLE PHYS SANTA CRUZ CA 95064 UNIV SHEFFIELD,DEPT PHYS SHEFFIELD S3 7RH S YORKSHIRE ENGLAND UNIV SIEGEN,FACHBEREICH PHYS W-5900 SIEGEN GERMANY UNIV TRIESTE,DIPARTIMENTO FIS I-34127 TRIESTE ITALY INFN,SEZIONE TRIESTE I-34127 TRIESTE ITALY UNIV WISCONSIN,DEPT PHYS MADISON WI 53706 UNIV WASHINGTON SEATTLE WA 98195 UNIV TURIN,IST COSMO GEOFIS I-10124 TURIN ITALY LBL BERKELEY CA 94720 UNIV SASSARI,IST MATEMAT & FIS I-07100 SASSARI ITALY
Titolo Testata:
Physics letters. Section B
fascicolo: 3-4, volume: 308, anno: 1993,
pagine: 425 - 434
SICI:
0370-2693(1993)308:3-4<425:SFHPPI>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
ALEPH;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
14
Recensione:
Indirizzi per estratti:
Citazione:
D. Buskulic et al., "SEARCH FOR HIGH-MASS PHOTON PAIRS IN E--]F(F)OVERBAR-GAMMA-GAMMA (F =E, MU,TAU, NU, Q) AT LEP(E)", Physics letters. Section B, 308(3-4), 1993, pp. 425-434

Abstract

The result of a search for high mass photon pairs from the processes e+ e- - ffgammagammaBAR (f = e, mu, tau, nu and q) with the ALEPH detector is reported. The result for f = e, mu and tau is to be compared with the observation of 4 events by the L3 Collaboration with invariantmasses, M(gammagamma), of the two photons near 60 GeV. From a data sample approximately twice as large taken from 1990 to 1992, 6 events are found with M(gammagamma) distributed between 50 GeV and 72 GeV, while 4.9 events are expected from a QED calculation. There is no evidencefor a mass peak; only one event (mu+ mu-gammagamma) at M(gammagamma) = 59.4 +/- 0.2 GeV is compatible with the L3 observation. In addition,for M(gammagamma) > 50 GeV, no event is found for e+e- - qqgammagammaBAR and only one event is found consistent with e+e- --> nunugammagamma; this event has M(gammagamma) = 58.5 +/- 1.9 GeV. High mass photon pair events have also been searched for in gammagamma collisions. This allows one to set an upper limit of 50 MeV for the width of an assumedresonance decaying to photon pairs.

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Documento generato il 02/12/20 alle ore 17:11:43