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Titolo:
A SEARCH FOR LEPTOQUARKS AT HERA
Autore:
AID S; ANDREEV V; ANDRIEU B; APPUHN RD; ARPAGAUS M; BABAEV A; BAHR J; BAN J; BAN Y; BARANOV P; BARRELET E; BARSCHKE R; BARTEL W; BARTH M; BASSLER U; BECK HP; BEHREND HJ; BELOUSOV A; BERGER C; BERNARDI G; BERNET R; BERTRANDCOREMANS G; BESANCON M; BEYER R; BIDDULPH P; BISPHAM P; BIZOT JC; BLOBEL V; BORRAS K; BOTTERWECK F; BOUDRY V; BRAEMER A; BRAUNSCHWEIG W; BRISSON V; BRUNCKO D; BRUNE C; BUCHOLZ R; BUNGENER L; BURGER J; BUSSER FW; BUNIATIAN A; BURKE S; BURTON MJ; BUSCHHORN G; CAMPBELL AJ; CARLI T; CHARLES F; CHARLET M; CLARKE D; CLEGG AB; CLERBAUX B; COCKS S; CONTRERAS JG; CORMACK C; COUGHLAN JA; COURAU A; COUSINOU MC; COUTURES C; COZZIKA G; CRIEGEE L; CUSSANS DG; CVACH J; DAGORET S; DAINTON JB; DAU WD; DAUM K; DAVID M; DAVIS CL; DELCOURT B; DELBUONO L; DEROECK A; DEWOLF EA; DIRKMANN M; DIXON P; DINEZZA P; DLUGOSZ W; DOLLFUS C; DOWELL JD; DREIS HB; DROUTSKOI A; DUBOC J; DULLMANN D; DUNGER O; DUHM H; EBERT J; EBERT TR; ECKERLIN G; EFREMENKO V; EGLI S; EICHLER R; EISELE F; EISENHANDLER E; ELLISON RJ; ELSEN E; ERDMANN M; ERDMANN W; EVRARD E; FAHR AB; FAVART L; FEDOTOV A; FEEKEN D; FELST R; FELTESSE J; FERENCEI J; FERRAROTTO F; FLAMM K; FLEISCHER M; FLIESER M; FLUGGE G; FOMENKO A; FOMINYKH B; FORBUSH M; FORMANEK J; FOSTER JM; FRANKE G; FRETWURST E; GABATHULER E; GABATHULER K; GAEDE F; GARVEY J; GAYLER J; GEBAUER M; GELLRICH A; GENZEL H; GERHARDS R; GLAZOV A; GOERLACH U; GOERLICH L; GOGITIDZE N; GOLDBERG M; GOLDNER D; GOLECBIERNAT K; GONZALEZPINEIRO B; GORELOV I; GRAB C; GRASSLER H; GRASSLER R; GREENSHAW T; GRIFFITHS R; GRINDHAMMER G; GRUBER A; GRUBER C; HAACK J; HAIDT D; HAJDUK L; HAMON O; HAMPEL M; HAPKE M; HAYNES WJ; HEINZELMANN G; HENDERSON RCW; HENSCHEL H; HERYNEK I; HESS MF; HILDESHEIM W; HILLER KH; HILTON CD; HLADKY J; HOEGER KC; HOPPNER M; HOFFMANN D; HOLTOM T; HORISBERGER R; HUDGSON VL; HUTTE M; HUFNAGEL H; IBBOTSON M; ITTERBECK H; JABIOL MA; JACHOLKOWSKA A; JACOBSSON C; JAFFRE M; JANOTH J; JANSEN T; JONSSON L; JOHANNSEN K; JOHNSON DP; JOHNSON L; JUNG H; KALMUS PIP; KANDER M; KANT D; KASCHOWITZ R; KATHAGE U; KATZY J; KAUFMANN HH; KAZARIAN S; KENYON IR; KERMICHE S; KEUKER C; KIESLING C; KLEIN M; KLEINWORT C; KNIES G; KO W; KOHLER T; KOHNE JH; KOLANOSKI H; KOLE F; KOLYA SD; KORBEL V; KORN M; KOSTKA P; KOTELNIKOV SK; KRAMERKAMPER T; KRASNY MW; KREHBIEL H; KRUCKER D; KRUGER U; KRUNERMARQUIS U; KUSTER H; KUHLEN M; KURCA T; KURZHOFER J; LACOUR D; LAFORGE B; LAMARCHE F; LANDER R; LANDON MPJ; LANGE W; LANGENEGGER U; LANIUS P; LAPORTE JF; LEBEDEV A; LEHNER F; LEVERENZ C; LEVONIAN S; LEY C; LINDSTROM G; LINDSTROEM M; LINK J; LINSEL F; LIPINSKI J; LIST B; LOBO G; LOCH P; LOHMANDER H; LOMAS JW; LOPEZ GC; LUBIMOV V; LUKE D; MAGNUSSEN N; MALINOVSKI E; MANI S; MARACEK R; MARAGE P; MARKS J; MARSHALL R; MARTENS J; MARTIN G; MARTIN R; MARTYN HU; MARTYNIAK J; MASSON S; MAVROIDIS T; MAXFIELD SJ; MCMAHON SJ; MEHTA A; MEIER K; MERZ T; MEYER A; MEYER A; MEYER H; MEYER J; MEYER PO; MIGLIORI A; MIKOCKI S; MILSTEAD D; MOECK J; MOREAU F; MORRIS JV; MULLER G; MULLER K; MURIN P; NAGOVIZIN V; NAHNHAUER R; NAROSKA B; NAUMANN T; NEWMAN PR; NEWTON D; NEYRET D; NGUYEN HK; NICHOLLS TC; NIEBERGALL F; NIEBUHR C; NIEDZBALLA C; NIGGLI H; NISIUS R; NOWAK G; NOYES GW; NYBERGWERTHER M; OAKDEN M; OBERLACK H; OBROCK U; OLSSON JE; OZEROV D; PALMEN P; PANARO E; PANITCH A; PASCAUD C; PATEL GD; PAWLETTA H; PEPPEL E; PEREZ E; PHILLIPS JP; PIEUCHOT A; PITZL D; POPE G; PRELL S; PROSI R; RABBERTZ K; RADEL G; RAUPACH F; REIMER P; REINSHAGEN S; RICK H; RIECH V; RIEDLBERGER J; RIEPENHAUSEN F; RIESS S; RIETZ M; RIZVI E; ROBERTSON SM; ROBMANN P; ROLOFF HE; ROOSEN R; ROSENBAUER K; ROSTOVTSEV A; ROUSE F; ROYON C; RUTER K; RUSAKOV S; RYBICKI K; SAHLMANN N; SANKEY DPC; SCHACHT P; SCHIEK S; SCHLEIF S; SCHLEPER P; VONSCHLIPPE W; SCHMIDT D; SCHMIDT G; SCHONING A; SCHRODER V; SCHUHMANN E; SCHWAB B; SEFKOW F; SEIDEL M; SELL R; SEMENOV A; SHEKELYAN V; SHEVIAKOV I; SHTARKOV LN; SIEGMON G; SIEWERT U; SIROIS Y; SKILLICORN IO; SMIRNOV P; SMITH JR; SOLOCHENKO V; SOLOVIEV Y; SPECKA A; SPIEKERMANN J; SPIELMAN S; SPITZER H; SQUINABOL F; STAROSTA R; STEENBOCK M; STOLZE K; STRAUMANN U; STRUCZINSKI W; SUTTON JP; TAPPROGGE S; TASEVSKY M; TCHERNYSHOV V; TCHETCHELNITSKI S; THEISSEN J; THIEBAUX C; THOMPSON G; TRUOL P; TURNAU J; TUTAS J; UELKES P; USIK A; VALKAR S; VALKAROVA A; VALLEE C; VANDENPLAS D; VANESCH P; VANMECHELEN P; VAZDIK Y; VERRECCHIA P; VILLET G; WACKER K; WAGENER A; WAGENER M; WALTHER A; WAUGH B; WEBER G; WEBER M; WEGENER D; WEGNER A; WELLISCH HP; WEST LR; WILKSEN T; WILLARD S; WINDE M; WINTER GG; WITTEK C; WUNSCH E; YIOU TP; ZACEK J; ZARBOCK D; ZHANG Z; ZHOKIN A; ZIMMER M; ZOMER F; ZSEMBERY J; ZUBER K; ZURNEDDEN M;
Indirizzi:
UNIV HAMBURG,INST EXPTL PHYS 2 W-2000 HAMBURG GERMANY RHEIN WESTFAL TH AACHEN,INST PHYS 1 W-5100 AACHEN GERMANY RHEIN WESTFAL TH AACHEN,INST PHYS 3 W-5100 AACHEN GERMANY HUMBOLDT UNIV BERLIN,INST PHYS BERLIN GERMANY UNIV BIRMINGHAM,SCH PHYS & SPACE RES BIRMINGHAM AL 00000 UNIV INSTELLING ANTWERP B-2610 WILRIJK BELGIUM VUB,ULB,INTERUNIV INST HIGH ENERGIES BRUSSELS BELGIUM RUTHERFORD APPLETON LAB DIDCOT OX11 0QX OXON ENGLAND INST NUCL PHYS KRAKOW POLAND UNIV CALIF DAVIS,DEPT PHYS DAVIS CA 95616 UNIV CALIF DAVIS,IIRPA DAVIS CA 95616 UNIV DORTMUND,INST PHYS W-4600 DORTMUND GERMANY CENS,DAPNIA,DSM,CEA GIF SUR YVETTE FRANCE UNIV GLASGOW,DEPT PHYS & ASTRON GLASGOW LANARK SCOTLAND DESY W-2000 HAMBURG GERMANY UNIV HAMBURG,INST EXPT PHYS 1 HAMBURG GERMANY UNIV HEIDELBERG,INST PHYS W-6900 HEIDELBERG GERMANY UNIV HEIDELBERG,INST HOCHENERGIEPHYS HEIDELBERG GERMANY CHRISTIAN ALBRECHTS UNIV KIEL,INST REINE & ANGEW KERNPHYS W-2300 KIELGERMANY SLOVAK ACAD SCI,INST EXPTL PHYS KOSICE 04353 SLOVAKIA UNIV LANCASTER,SCH PHYS & MAT LANCASTER ENGLAND UNIV LIVERPOOL,DEPT PHYS LIVERPOOL L69 3BX MERSEYSIDE ENGLAND UNIV LONDON QUEEN MARY & WESTFIELD COLL LONDON E1 4NS ENGLAND LUND UNIV,DEPT PHYS LUND SWEDEN UNIV MANCHESTER,DEPT PHYS MANCHESTER M13 9PL LANCS ENGLAND UNIV AIX MARSEILLE 2,CPPM,IN2P3,CNRS MARSEILLE FRANCE INST THEORET & EXPTL PHYS MOSCOW 117259 RUSSIA PN LEBEDEV PHYS INST MOSCOW 117924 RUSSIA MAX PLANCK INST PHYS & ASTROPHYS MUNICH GERMANY UNIV PARIS 11,LAL,IN2P3,CNRS ORSAY FRANCE ECOLE POLYTECH,LPNHE,IN2P3,CNRS PALAISEAU FRANCE UNIV PARIS 06,LPNHE PARIS FRANCE UNIV PARIS 07,CNRS,IN2P3 PARIS FRANCE ACAD SCI CZECH REPUBL,INST PHYS PRAGUE CZECH REPUBLIC UNIV ROMA LA SAPIENZA,DIPARTIMENTO FIS I-00185 ROME ITALY IST NAZL FIS NUCL ROME ITALY CHARLES UNIV,NUCL CTR PRAGUE CZECH REPUBLIC PAUL SCHERRER INST VILLIGEN SWITZERLAND BERG UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS W-5600 WUPPERTAL GERMANY INST HOCHENERGIEPHYS,DESY O-1615 ZEUTHEN GERMANY ETH ZURICH,INST TEILCHENPHYS ZURICH SWITZERLAND UNIV ZURICH,INST PHYS ZURICH SWITZERLAND
Titolo Testata:
Physics letters. Section B
fascicolo: 2, volume: 369, anno: 1996,
pagine: 173 - 185
SICI:
0370-2693(1996)369:2<173:ASFLAH>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
LIQUID ARGON CALORIMETER; LUND MONTE-CARLO; PARTON DISTRIBUTIONS; JET FRAGMENTATION; E+E-PHYSICS; H1; COLLISIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
30
Recensione:
Indirizzi per estratti:
Citazione:
S. Aid et al., "A SEARCH FOR LEPTOQUARKS AT HERA", Physics letters. Section B, 369(2), 1996, pp. 173-185

Abstract

A search for leptoquarks at HERA was performed in H1 using 1994 e(+)pdata corresponding to an integrated luminosity of about 3 pb(-1). Single leptoquarks were searched for in direct positron-quark fusion processes taking into account possible decays into lepton-quark pairs of either the first, the second, or the third generation. No significant deviation from the Standard Model predictions is found in the various final states studied and mass dependent exclusion limits are derived onthe Yukawa couplings of the leptoquarks. Compared with earlier results from an analysis of e(-)p data, exclusion limits are considerably improved for leptoquarks which could be produced via e(+)-valence quark fusion. For leptoquarks with lepton flavour conserving couplings, masses up to 275 GeV (depending on the leptoquark type) are excluded for coupling values larger than root 4 pi alpha(cm). For leptoquarks with lepton flavour violating couplings, masses up to 225 GeV are excluded for couplings with leptons of the second or third generation larger than root 4 pi alpha(em). Fourteen possible combinations of couplings arestudied and stringent exclusion limits comparable or better than any existing direct or indirect limits are obtained for each leptoquark type.

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Documento generato il 30/11/20 alle ore 08:40:23