OBSERVATION OF EVENTS WITH AN ISOLATED HIGH-ENERGY LEPTON AND MISSINGTRANSVERSE-MOMENTUM AT HERA

Authors
ADLOFF C ANDERSON M ANDREEV V ANDRIEU B ARKADOV V ARNDT C AYYAZ I BABAEV A BAHR J BAN J BARANOV P BARRELET E BARSCHKE R BARTELL W BASSLER U BATE P BECK M BEGLARIAN A BEHNKE O BEHREND HJ BEIER C BELOUSOV A BERGER C BERNARDI G BERTRANDCOREMANS G BIDDULPH P BIZOT JC BOUDRY V BRAEMER A BRAUNSCHWEIG W BRISSON V BROWN DP BRUCKNER W BRUEL P BRUNCKO D BURGER J BUSSER FW BUNIATIAN A BURKE S BUSCHHORN G CALVET D CAMPBELL AJ CARLI T CHABERT E CHARLET M CLARKE D CLERBAUX B COCKS S CONTRERAS JG CORMACK C COUGHLAN JA COUSINOU MC COX BE COZZIKA G CVACH J DAINTON JB DAU WD DAUM K DAVID M DAVIDSSON M DEROECK A DEWOLF EA DELCOURT B DIACONU C DIRKMANN M DIXON P DLUGOSZ W DONOVAN KT DOWELL JD DROUTSKOI A EBERT J ECKERLIN G ECKSTEIN D EFREMENKO V EGLI S EICHLER R EISELE F EISENHANDLER E ELSEN E ENZENBERGER M ERDMANN M FAHR AB FAVART L FEDOTOV A FELST R FELTESSE J FERENCEI J FERRAROTTO F FLEISCHER M FLUGGE G FOMENKO A FORMANEK J FOSTER JM FRANKE G GABATHULER E GABATHULER K GAEDE F GARVEY J GAYLER J GEBAUER M GERHARDS R GHAZARYAN S GLAZOV A GOERLICH L GOGITIDZE N GOLDBERG M GORELOV I GRAB C GRASSLER H GREENSHAW T GRIFFITHS RK GRINDHAMMER G GRUBER C HADIG T HAIDT D HAJDUK L HALLER T HAMPEL M HAUSTEIN V HAYNES WJ HEINEMANN B HEINZELMANN G HENDERSON RCW HENGSTMANN S HENSCHEL H HEREMANS R HERYNEK I HEWITT K HILLER KH HILTON CD HLADKY J HOFFMANN D HOLTOM T HORISBERGER R HUDGSON VL HURLING S IBBOTSON M ISSEVER C ITTERBECK H JACQUET M JAFFRE M JANSEN DM JONSSON L JOHNSON DP JUNG H KAESTLI HC KANDER M KANT D KARLSSON M KATHAGE U KATZY J KAUFMANN HH KAUFMANN O KAUSCH M KENYON IR KERMICHE S KEUKER C KIESLING C KLEIN M KLEINWORT C KNIES G KOHNE JH KOLANOSKI H KOLYA SD KORBEL V KOSTKA P KOTELNIKOV SK KRAMERKAMPER T KRASNY MW KREHBIEL H KRUCKER D KUPPER A KUSTER H KUHLEN M KURCA T LAFORGE B LAHMANN R LANDON MPJ LANGE W LANGENEGGER U LEBEDEV A LEHNER F LEMAITRE V LEVONIAN S LINDSTROEM M LIST B LOBO G LUBIMOV V LUKE D LYTKIN L MAGNUSSEN N MAHLKEKRUGER H MALINOVSKI E MARACEK R MARAGE P MARKS J MARSHALL R MARTIN G MARTYN HU MARTYNIAK J MAXFIELD SJ MCMAHON SJ MCMAHON TR 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 MOHR R MOHRDIECK S MOREAU F MORRIS JV MROCZKO E MULLER D MULLER K MURIN P NAGOVIZIN V NAROSKA B NAUMANN T NEGRI I NEWMAN PR NEWTON D NGUYEN HK NICHOLLS TC NIEBERGALL F NIEBUHR C NIEDZBALLA C NIGGLI H NIX O NOWAK G NUNNEMANN T 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 RABBERTZ K REIMER P REISERT B RICK H RIESS S RIZVI E ROBMANN P ROOSEN R ROSENBAUER K ROSTOVTSEV A ROUSE F ROYON C RUSAKOV S RYBICKI K SANKEY DPC SCHACHT P SCHEINS J SCHIEK S SCHLEIF S SCHLEPER P SCHMIDT D SCHMIDT G SCHOEFFEL L SCHONING A SCHRODER V SCHULTZCOULON HC 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 SPITZER H SQUINABOL F STEFFEN P STEINBERG R STEINHART J STELLA B STELLBERGER A STIEWE J STRAUMANN U STRUCZINSKI W SUTTON JP SWART M TAPPROGGE S TASEVSKY M TCHERNYSHOV V TCHETCHELNITSKI S THEISSEN J THOMPSON G THOMPSON PD TOBIEN N TODENHAGEN R TRUOL P TSIPOLITIS G TURNAU J TZAMARIUDAKI E UDLUFT S USIK A VALKAR S VALKAROVA A VALLEE C VANESCH P VANMECHELEN P VAZDIK Y VILLET G WACKER K WALLNY R WALTER T 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 WITTMANN E WOBISCH M WOLLATZ H WUNSCH E ZACEK J ZALESAK J ZHANG Z ZHOKIN A ZINI P ZOMER F ZSEMBERY J ZURNEDDEN M
Citation
C. Adloff et al., OBSERVATION OF EVENTS WITH AN ISOLATED HIGH-ENERGY LEPTON AND MISSINGTRANSVERSE-MOMENTUM AT HERA, The European Physical Journal. C: Particles and Fields, 5(4), 1998, pp. 575-584
Citations number
22
Categorie Soggetti
Physics, Particles & Fields
Journal title
The European Physical Journal. C: Particles and Fields → ACNP
ISSN journal
14346044
Volume
5
Issue
4
Year of publication
1998
Pages
575 - 584
Database
ISI
SICI code
1434-6044(1998)5:4<575:OOEWAI>2.0.ZU;2-1
Abstract
A search for events with an imbalance in transverse momentum and with isolated high energy leptons has been carried out at the positron-prot on collider HERA. One e(v)ent with and e(-) and five events with a mu( +/-) are found together with evidence for undetected particles carryin g transverse momentum. Within the Standard Model the dominant origin o f events with this kind of topology is the production of W bosons with subsequent leptonic decay. Three of the six events are within measure ment errors found in a region of phase space likely to be populated by this process, while the remaining events show kinematic properties wh ich are atypical of all Standard Model processes considered.