SEARCHES FOR CHARGINOS AND NEUTRALINOS IN E(-)-COLLISIONS AT ROOT-S=161-GEV AND 172-GEV()E()

Authors
BARATE R BUSKULIC D DECAMP D GHEZ P GOY C LEES JP LUCOTTE A MINARD MN NIEF JY PIETRZYK B CASADO MP CHMEISSANI M COMAS P CRESPO JM DELFINO M FERNANDEZ E FERNANDEZBOSMAN M GARRIDO L JUSTE A MARTINEZ M MERINO G MIQUEL R MIR LM PADILLA C PARK IC PASCUAL A PERLAS JA RIU I SANCHEZ F COLALEO A CREANZA D DEPALMA M GELAO G IASELLI G MAGGI G MAGGI M MARINELLI N NUZZO S RANIERI A RASO G RUGGIERI F SELVAGGI G SILVESTRIS L TEMPESTA P TRICOMI A ZITO G HUANG X LIN J OUYANG Q WANG T XIE Y XU R XUE S ZHANG J ZHANG L ZHAO W ABBANEO D ALEMANY R BAZARKO AO BECKER U BRIGHTTHOMAS P CATTANEO M CERUTTI F DISSERTORI G DREVERMANN H FORTY RW FRANK M GIANOTTI F HAGELBERG R HANSEN JB HARVEY J JANOT P JOST B KNERINGER E LEHRAUS I MATO P MINTEN A MONETA L PACHECO A PUSZTASZERI JF RANJARD F RIZZO G ROLANDI L ROUSSEAU D SCHLATTER D SCHMITT M SCHNEIDER O TEJESSY W TEUBERT F TOMALIN IR WACHSMUTH H WAGNER A AJALTOUNI Z BARRES A BOYER C FALVARD A FERDI C GAY P GUICHENEY C HENRARD P JOUSSET J MICHEL B MONTEIL S MONTRET JC PALLIN D PERRET F PODLYSKI F PRORIOL J ROSNET P ROSSIGNOL JM FEARNLEY T HANSEN JD HANSEN JR HANSEN PH NILSSON BS RENSCH B WAANANEN A DASKALAKIS G KYRIAKIS A MARKOU C SIMOPOULOU E VAYAKI A BLONDEL A BRIENT JC MACHEFERT F ROUGE A RUMPF M VALASSI A VIDEAU H BOCCALI T FOCARDI E PARRINI G ZACHARIADOU K CAVANAUGH R CORDEN M GEORGIOPOULOS C HUEHN T JAFFE DE ANTONELLI A BENCIVENNI G BOLOGNA G BOSSI F CAMPANA P CAPON G GASPER D CHIARELLA V FELICI G LAURELLI P MANNOCCHI G MURTAS F MURTAS GP PASSALACQUA L PEPEALTARELLI M CURTIS L DORRIS SJ HALLEY AW KNOWLES IG LYNCH JG OSHEA V RAINE C SCARR JM SMITH K TEIXEIRADIAS P THOMPSON AS THOMSON E THOMSON F TURNBULL RM BUCHMULLER O DHAMOTHARAN S GEWENIGER C GRAEFE G HANKE P HANSPER G HEPP V KLUGE EE PUTZER A SOMMER J TITTEL K WERNER S WUNSCH M BEUSELINCK R BINNIE DM CAMERON W DORNAN PJ GIRONE M GOODSIR S MARTIN EB MORAWITZ P MOUTOUSSI A NASH J SEDGBEER JK SPAGNOLO P STACEY AM WILLIAMS MD GHETE VM GIRTLER P KUHN D RUDOLPH G BETTERIDGE AP BOWDERY CK BUCK PG COLRAIN P CRAWFORD G FINCH AJ FOSTER F HUGHES G JONES RWL SLOAN T WHELAN EP WILLIAMS MI GIEHL I HOFFMANN C JAKOBS K KLEINKNECHT K QUAST G RENK B ROHNE E SANDER HG VANGEMMEREN P ZEITNITZ C AUBERT JJ BENCHOUK C BONISSENT A BUJOSA G CARR J COYLE P DIACONU C EALET A FOUCHEZ D KONSTANTINIDIS N LEROY O MOTSCH F PAYRE P TALBY M SADOUKI A THULASIDAS M TILQUIN A TRABELSI K ALEPPO M ANTONELLI M RAGUSA F BERLICH R BLUM W BUSCHER V DIETL H GANIS G GOTZHEIN C KROHA H LUTJENS G LUTZ G MANNER W MOSER HG RICHTER R ROSADOSCHLOSSER A SCHAEL S SETTLES R SEYWERD H STDENIS R STENZEL H WIEDENMANN W WOLF G BOUCROT J CALLOT O CHEN S DAVIER M DUFLOT L GRIVAZ JF HEUSSE P HOCKER A JACHOLKOWSKA A KIM DW LEDIBERDER F LEFRANCOIS J LUTZ AM KADO M SCHUNE MH SERIN L TOURNEFIER E VEILLET JJ VIDEAU I ZERWAS D AZZURRI P BAGLIESI G BETTARINI S BOZZI C CALDERINI G CIULLI V DELLORSO R FANTECHI R FERRANTE I GIASSI A GREGORIO A LIGABUE F LUSIANI A MARROCCHESI PS MESSINEO A PALLA F SANGUINETTI G SCIABA A SGUAZZONI G STEINBERGER J TENCHINI R VANNINI C VENTURI A VERDINI PG BLAIR GA BRYANT LM CHAMBERS JT GREEN MG MEDCALF T PERRODO P STRONG JA VONWIMMERSPERGTOELLER JH BOTTERILL DR CLIFFT RW EDGECOCK TR HAYWOOD S MALEY P NORTON PR THOMPSON JC WRIGHT AE BLOCHDEVAUX B COLAS P FABBRO B LANCON E LEMAIRE MC LOCCI E PEREZ P RANDER J RENARDY JF ROSOWSKY A ROUSSARIE A SCHWINDLING J TRABELSI A VALLAGE B BLACK SN DANN JH KIM HY LITKE AM MCNEIL MA TAYLOR G BOOTH CN BREW CAJ CARTWRIGHT S COMBLEY F KELLY MS LEHTO M REEVE J THOMPSON LF AFFHOLDERBACH K BOHRER A BRANDT S COWAN G FOSS J GRUPEN C SMOLIK L STEPHAN F APOLLONIO M BOSISIO L DELLAMARINA R GIANNINI G GOBBO B MUSOLINO G PUTZ J ROTHBERG J WASSERBAECH S WILLIAMS RW ARMSTRONG SR CHARLES E ELMER P FERGUSON DPS GAO Y GONZALEZ S GREENING TC HAYES OJ HU H JIN S MCNAMARA PA NACHTMAN JM NIELSEN J OREJUDOS W PAN YB SAADI Y SCOTT IJ WALSH J WU SL WU X YAMARTINO JM ZOBERNIG G
Citation
R. Barate et al., SEARCHES FOR CHARGINOS AND NEUTRALINOS IN E(-)-COLLISIONS AT ROOT-S=161-GEV AND 172-GEV()E(), EUROPEAN PHYSICAL JOURNAL C-PARTICLES AND FIELDS, 2(3), 1998, pp. 417-439
Citations number
42
Categorie Soggetti
Physics, Particles & Fields
Journal title
EUROPEAN PHYSICAL JOURNAL C-PARTICLES AND FIELDS → ACNP
ISSN journal
14346044
Volume
2
Issue
3
Year of publication
1998
Pages
417 - 439
Database
ISI
SICI code
1434-6044(1998)2:3<417:SFCANI>2.0.ZU;2-Q
Abstract
The data recorded by the ALEPH detector at centre-of-mass energies of 161, 170, and 172 GeV are analysed for signals of chargino and neutral ino production. No evidence of a signal is found, although candidate e vents consistent with the expectations from Standard Model processes a re observed. Limits at 95% C.L. on the production cross sections are d erived and bounds on the parameters of the Minimal Supersymmetric Stan dard Model are set. The lower limit on the mass of the lightest chargi no is 85.5 GeV/c(2) for gaugino-like charginos (mu = -500 GeV/c(2)), a nd 85.0 GeV/c(2) for Higgsino-like charginos (M-2 = 500 GeV/c(2)), for heavy sneutrinos (M(<(nu)over tilde>) greater than or equal to 200 Ge V/c(2)) and tan beta = root 2. The effect of light sleptons on chargin o and neutralino limits is investigated. The assumptions of a universa l slepton mass and a universal gaugino mass are relaxed, allowing less model-dependent limits to be obtained.