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Titolo:
OBSERVATION OF EVENTS AT VERY HIGH Q(2) IN EP COLLISIONS AT HERA
Autore:
ADLOFF C; AID S; ANDERSON M; ANDREEV V; ANDRIEU B; ARKADOV V; ARNDT C; AYYAZ I; BABAEV A; BAHR J; BAN J; BAN Y; BARANOV P; BARRELET E; BARSCHKE R; BARTEL W; BASSLER U; BECK HP; BECK M; BEHREND HJ; BELOUSOV A; BERGER C; BERNARDI G; BERTRANDCOREMANS G; BEYER R; BIDDULPH P; BISPHAM P; BIZOT JC; BORRAS K; BOTTERWECK F; BOUDRY V; BOUROV S; BRAEMER A; BRAUNSCHWEIG W; BRISSON V; BRUCKNER W; BRUEL P; BRUNCKO D; BRUNE C; BUCHHOLZ R; BUNGENER L; BURGER J; BUSSER FW; BUNIATIAN A; BURKE S; BUSCHHORN G; CALVET D; CAMPBELL AJ; CARLI T; CHARLET M; CLARKE D; CLERBAUX B; COCKS S; CONTRERAS JG; CORMACK C; COUGHLAN JA; COURAU A; COUSINOU MC; COX BD; COZZIKA G; CRIEGEE L; CUSSANS DG; CVACH J; DAGORET S; DAINTON JB; DAU WD; DAUM K; DAVID M; DAVIS CL; DEROECK A; DEWOLF EA; DELCOURT B; DIRKMANN M; DIXON P; DLUGOSZ W; DOLLFUS C; DONOVAN KT; DOWELL JD; DREIS HB; DROUTSKOI A; DUNGER O; EBERT J; EBERT TR; ECKERLIN G; EFREMENKO V; EGLI S; EICHLER R; EISELE F; EISENHANDLER E; ELSEN E; ERDMANN M; FAHR AB; FAVART L; FEDOTOV A; FELST R; FELTESSE J; FERENCEI J; FERRAROTTO F; FLAMM K; FLEISCHER M; FLIESER M; FLUGGE G; FOMENKO A; FORMANEK J; FOSTER JM; FRANKE G; FRETWURST E; GABATHULER E; GABATHULER K; GAEDE F; GARVEY J; GAYLER J; GEBAUER M; GENZEL H; GERHARDS R; GLAZOV A; GOERLICH L; GOGITIDZE N; GOLDBERG M; GOLDNER D; GOLECBIERNAT K; GONZALEZPINEIRO B; GORELOV I; GRAB C; GRASSLER H; GREENSHAW T; GRIFFITHS RK; GRINDHAMMER G; GRUBER A; GRUBER C; HADIG T; HAIDT D; HAJDUK L; HALLER T; HAMPEL M; HAYNES WJ; HEINEMANN B; HEINZELMANN G; HENDERSON RCW; HENSCHEL H; HERYNEK I; HESS MF; HEWITT K; HILLER KH; HILTON CD; HLADKY J; HOPPNER M; HOFFMANN D; HOLTOM T; HORISBERGER R; HUDGSON VL; HUTTE M; IBBOTSON M; ISSEVER C; ITTERBECK H; JACHOLKOWSKA A; JACOBSSON C; JACQUET M; JAFFRE M; JANOTH J; JANSEN DM; JANSEN T; JONSSON L; JOHNSON DP; JUNG H; KALMUS PIP; KANDER M; KANT D; KASCHOWITZ R; KATHAGE U; KATZY J; KAUFMANN HH; KAUFMANN O; KAUSCH M; KAZARIAN S; KENYON IR; KERMICHE S; KEUKER C; KIESLING C; KLEIN M; KLEINWORT C; KNIES G; KOHLER T; KOHNE JH; KOLANOSKI H; KOLYA SD; KORBEL V; KOSTKA P; KOTELNIKOV SK; KRAMERKAMPER T; KRASNY MW; KREBBIEL H; KRUCKER D; KUPPER A; KUSTER H; KUHLEN M; KURCA T; KURZHOFER J; LAFORGE B; LANDON MPJ; LANGE W; LANGENEGGER U; LEBEDEV A; LEHNER F; LEMAITRE V; LEVONIAN S; LINDSTROM G; LINDSTROEM M; LINSEL F; LIPINSKI J; LIST B; LOBO G; LOPEZ GC; LUBIMOV V; LUKE D; LYTKIN L; MAGNUSSEN N; MAHLKEKRUGER H; MALINOVSKI E; MARACEK R; MARAGE P; MARKS J; MARSHALL R; MARTENS J; MARTIN G; MARTIN R; MARTYN HU; MARTYNIAK J; MAVROIDIS T; MAXFIELD SJ; MCMAHON SJ; MEHTA A; MEIER K; MERKEL P; METLICA F; MEYER A; MEYER A; MEYER H; MEYER J; MEYER PO; MIGLIORI A; MIKOCKI S; MILSTEAD D; MOECK J; MOREAU F; MORRIS JV; MROCZKO E; MULLER D; MULLER K; MURIN P; NAGOVIZIN V; NAHNHAUER R; NAROSKA B; NAUMANN T; NEGRI I; NEWMAN PR; NEWTON D; NGUYEN HK; NICHOLLS TC; NIEBERGALL F; NIEBUHR C; NIEDZBALLA C; NIGGLI H; NOWAK G; NUNNEMANN T; NYBERGWERTHER M; OBERLACK H; OLSSON JE; OZEROV D; PALMEN P; PANARO E; PANITCH A; PASCAUD C; PASSAGGIO S; PATEL GD; PAWLETTA H; PEPPEL E; PEREZ E; PHILLIPS JP; PIEUCHOT A; PITZL D; POSCHL R; POPE G; POVH B; PRELL S; RABBERTZ K; REIMER P; RICK H; RIESS S; RIZVI E; ROBMANN P; ROOSEN R; ROSENBAUER K; ROSTOVTSEV A; ROUSE F; ROYON C; RUTER K; RUSAKOV S; RYBICKI K; SANKEY DPC; SCHACHT P; SCHIEK S; SCHLEIF S; SCHLEPER P; VONSCHLIPPE W; SCHMIDT D; SCHMIDT G; SCHOEFFEL L; SCHONING A; SCHRODER V; SCHUHMANN E; SCHWAB B; SEFKOW F; SEMENOV A; SHEKELYAN V; SHEVIAKOV I; SHTARKOV LN; SIEGMON G; SIEWERT U; SIROIS Y; SKILLICORN IO; SLOAN T; SMIRNOV P; SMITH M; SOLOCHENKO V; SOLOVIEV Y; SPECKA A; SPIEKERMANN J; SPIELMAN S; SPITZER H; SQUINABOL F; STEFFEN P; STEINBERG R; STEINHART J; STELLA B; STELLBERGER A; STIER J; STIEWE J; STOSSLEIN U; STOLZE K; STRAUMANN U; STRUCZINSKI W; SUTTON JP; TAPPROGGE S; TASEVSKY M; TCHERNYSHOV V; TCHETCHELNITSKI S; THEISSEN J; THIEBAUX C; THOMPSON G; THOMPSON PD; TOBIEN N; TODENHAGEN R; TRUOL P; TSIPOLITIS G; TURNAU J; TZAMARIUDAKI E; UELKES P; USIK A; VALKAR S; VALKAROVA A; VALLEE C; VANESCH P; VANMECHELEN P; VANDENPLAS D; VAZDIK Y; VERRECCHIA P; VILLET G; WACKER K; WAGENER A; WAGENER M; WALLNY R; WAUGH B; WEBER G; WEBER M; WEGENER D; WEGNER A; WENGLER T; WERNER M; WEST LR; WIESAND S; WILKSEN T; WILLARD S; WINDE M; WINTER GG; WITTEK C; WOBISCH M; WOLLATZ H; WUNSCH E; ZACEK J; ZARBOCK D; ZHANG Z; ZHOKIN A; ZINI P; ZOMER F; ZSEMBERY J; ZUBER K; ZURNEDDEN M;
Indirizzi:
BERG UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS D-42097 WUPPERTAL GERMANY UNIV LANCASTER,SCH PHYS & CHEM LANCASTER LA1 4YB ENGLAND UNIV LIVERPOOL,DEPT PHYS LIVERPOOL L69 3BX MERSEYSIDE ENGLAND UNIV LONDON QUEEN MARY & WESTFIELD COLL LONDON E1 4NS ENGLAND LUND UNIV,DEPT PHYS S-22362 LUND SWEDEN UNIV MANCHESTER,DEPT PHYS MANCHESTER M13 9PL LANCS ENGLAND UNIV AIX MARSEILLE 2,IN2P3,CNRS,CPPM F-13288 MARSEILLE FRANCE INST THEORET & EXPT PHYS RU-117259 MOSCOW RUSSIA PN LEBEDEV PHYS INST RU-117924 MOSCOW RUSSIA MAX PLANCK INST PHYS & ASTROPHYS D-80805 MUNICH GERMANY UNIV PARIS 11,IN2P3,CNRS,LAL F-91405 ORSAY FRANCE ECOLE POLYTECH,CNRS,IN2P3,LPNHE F-91128 PALAISEAU FRANCE UNIV PARIS 06,LPNHE F-75252 PARIS FRANCE UNIV PARIS 07,IN2P3,CNRS F-75252 PARIS FRANCE ACAD SCI CZECH REPUBL,INST PHYS CZ-18040 PRAGUE CZECH REPUBLIC CHARLES UNIV,NUCL CTR CZ-18000 PRAGUE CZECH REPUBLIC UNIV ROMA 1,IST NAZL FIS NUCL I-00146 ROME ITALY UNIV ROMA 3,DIPARTIMENTO FIS I-00146 ROME ITALY PAUL SCHERRER INST CH-5232 VILLIGEN SWITZERLAND DESY,INST HOCHENERGIEPHYS D-15738 ZEUTHEN GERMANY ETH ZURICH,INST TEILCHENPHYS CH-8093 ZURICH SWITZERLAND UNIV ZURICH,INST PHYS CH-8001 ZURICH SWITZERLAND HUMBOLDT UNIV BERLIN,INST PHYS D-10115 BERLIN GERMANY BERG UNIV GESAMTHSCH WUPPERTAL,RECHENZENTRUM D-42097 WUPPERTAL GERMANY RHEIN WESTFAL TH AACHEN,INST PHYS 1 D-52074 AACHEN GERMANY RHEIN WESTFAL TH AACHEN,INST PHYS 3 D-52074 AACHEN GERMANY UNIV BIRMINGHAM,SCH PHYS & SPACE RES BIRMINGHAM B15 2TT W MIDLANDS ENGLAND UNIV INSTELLING ANTWERP B-2610 WILRIJK BELGIUM FREE UNIV BRUSSELS,VUB,INTERUNIV INST HIGH ENERGIES BRUSSELS BELGIUM RUTHERFORD APPLETON LAB DIDCOT OX11 0QX OXON ENGLAND INST NUCL PHYS PL-30055 KRAKOW POLAND UNIV CALIF DAVIS,DEPT PHYS DAVIS CA 95616 UNIV CALIF DAVIS,IIRPA DAVIS CA 95616 UNIV DORTMUND,INST PHYS D-44227 DORTMUND GERMANY CE SACLY,CEA,DAPNIA,DSM F-91191 GIF SUR YVETTE FRANCE UNIV GLASGOW,DEPT PHYS & ASTRON GLASGOW G12 8QQ LANARK SCOTLAND DESY D-22603 HAMBURG GERMANY UNIV HAMBURG,INST EXPT PHYS 1 D-22761 HAMBURG GERMANY UNIV HAMBURG,INST EXPT PHYS 2 D-22761 HAMBURG GERMANY MAX PLANCK INST KERNPHYS D-69029 HEIDELBERG GERMANY UNIV HEIDELBERG,INST PHYS D-69120 HEIDELBERG GERMANY UNIV HEIDELBERG,INST HOCHENERGIEPHYS D-69120 HEIDELBERG GERMANY CHRISTIAN ALBRECHTS UNIV KIEL,INST REINE & ANGEW KERNPHYS D-24118 KIEL GERMANY SLOVAK ACAD SCI,INST EXPT PHYS KOSICE 04353 SLOVAKIA
Titolo Testata:
Zeitschrift fur Physik. C, Particles and fields
fascicolo: 2, volume: 74, anno: 1997,
pagine: 191 - 205
SICI:
0170-9739(1997)74:2<191:OOEAVH>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
LIQUID ARGON CALORIMETER; ; INELASTIC MUON SCATTERING; PHOTON CROSS-SECTION; LEADING ORDER; QCD CASCADES; PROTON; H1; LEPTOQUARKS; (P)OVER-BAR-P;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
80
Recensione:
Indirizzi per estratti:
Citazione:
C. Adloff et al., "OBSERVATION OF EVENTS AT VERY HIGH Q(2) IN EP COLLISIONS AT HERA", Zeitschrift fur Physik. C, Particles and fields, 74(2), 1997, pp. 191-205

Abstract

Measurements of ep scattering with squared 4-momentum transfer Q(2) up to 35000 GeV2 are compared with the expectation of the standard deep-inelastic model of lepton-nucleon scattering (DIS). For Q(2) > 15000 GeV2 N-obs = 12 neutral current candidate events are observed where the expectation is N-DIS = 4.71 +/- 0.76 events. In the same Q(2) range,N-obs = 4 charged current candidates are observed where the expectation is N-DIS = 1.77 +/- 0.87 events. The probability P(N greater than or equal to N-obs) that the DIS model signal N fluctuates to N greater than or equal to N-obs in a random set of experiments is 6 x 10(-3) for neutral current and 0.14, for charged cur rent, The difference in the observed and expected number of Neutral Current events is mostly dueto events at large masses M = root xs in which the positron is backscattered at large y = Q(2)/M-2.

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Documento generato il 04/12/20 alle ore 09:34:14