SEARCH FOR UNSTABLE NEUTRAL AND CHARGED HEAVY-LEPTONS IN E(-) COLLISIONS AT ROOT-S=130 AND 136 GEV()E()

Authors
ALEXANDER G ALLISON J ALTEKAMP N AMETEWEE K ANDERSON KJ ANDERSON S ARCELLI S ASAI S AXEN D AZUELOS G BALL AH BARBERIO E BARLOW RJ BARTOLDUS R BATLEY JR BECHTLUFT J BEESTON C BEHNKE T BELL AN BELL KW BELLA G BENTVELSEN S BERLICH P BETHKE S BIEBEL O BLOBEL V BLOODWORTH IJ BLOOMER JE BOBINSKI M BOCK P BOSCH HM BOUTEMEUR M BOUWENS BT BRAIBANT S BROWN RM BURCKHART HJ BURGARD C BURGIN R CAPILUPPI P CARNEGIE RK CARTER AA CARTER JR CHANG CY CHARLESWORTH C CHARLTON DG CHRISMAN D CHU SL CLARKE PEL COHEN I CONBOY JE COOKE OC CUFFIANI M DADO S DALLAPICCOLA C DALLAVALLE GM DEJONG S DELPOZO LA DESCH K DIXIT MS SILVA EDE DOUCET M DUCHOVNI E DUCKECK G DUERDOTH IP EDWARDS JEG ESTABROOKS PG EVANS HG EVANS M FABBRI F FATH P FIEDLER F FIERRO M FISCHER HM FOLMAN R FONG DG FOUCHER M FURTJES A GAGNON P GAIDOT A GARY JW GASCON J GASCONSHOTKIN SM GEDDES NI GEICHGIMBEL C GENTIT FX GERALIS T GIACOMELLI G GIACOMELLI P GIACOMELLI R GIBSON V GIBSON WR GINGRICH DM GLENZINSKI D GOLDBERG J GOODRICK MJ GORN W GRANDI C GROSS E GRUWE M HAJDU C HANSON GG HANSROUL M HAPKE M HARGROVE CK HART PA HARTMANN C HAUSCHILD M HAWKES CM HAWKINGS R HEMINGWAY RJ HERTEN G HEUER RD HILDRETH MD HILL JC HILLIER SJ HILSE T HOBSON PR HOMER RJ HONMA AK HORVATH D HOWARD R HUGHESJONES RE HUTCHCROFT DE IGOKEMENES P IMRIE DC INGRAM MR ISHII K JAWAHERY A JEFFREYS PW JEREMIE H JIMACK M JOLY A JONES CR JONES G JONES M JONES RWL JOST U JOVANOVIC P JUNK TR KARLEN D KAWAGOE K KAWAMOTO T KEELER RK KELLOGG RG KENNEDY BW KING BJ KIRK J KLUTH S KOBAYASHI T KOBEL M KOETKE DS KOKOTT TP KOMAMIYA S KOWALEWSKI R KRESS T KRIEGER P VONKROGH J KYBERD P LAFFERTY GD LAFOUX H LAHMANN R LAI WP LANSKE D LAUBER J LAUTENSCHLAGER SR LAYTER JG LAZIC D LEE AM LEFEBVRE E LELLOUCH D LETTS J LEVINSON L LEWIS C LLOYD SL LOEBINGER FK LONG GD LOSTY MJ LUDWIG J LUIG A MALIK A MANNELLI M MARCELLINI S MARKUS C MARTIN AJ MARTIN JP MARTINEZ G MASHINO T MATTHEWS W MATTIG P MCDONALD WJ MCKENNA J MCKIGNEY EA MCMAHON TJ MCNAB AI MCPHERSON RA MEIJERS F MENKE S MERRITT FS MES H MEYER J MICHELINI A MIKENBERG G MILLER DJ MIR R MOHR W MONTANARI A MORI T MORII M MULLER U NAGAI K NAKAMURA I NEAL HA NELLEN B NIJJHAR B NISIUS R ONEALE SW OAKHAM FG ODORICI F OGREN HO OMORI T OREGLIA MJ ORITO S PALINKAS J PASZTOR G PATER JR PATRICK GN PATT J PEARCE MJ PETZOLD S PFEIFENSCHNEIDER P PILCHER JE PINFOLD J PLANE DE POFFENBERGER P POLI B POSTHAUS A PRZYSIEZNIAK H REES DL RIGBY D ROBINS SA RODNING N RONEY JM ROOKE A ROS E ROSSI AM ROSVICK M ROUTENBURG P ROZEN Y RUNGE K RUNOLFSSON O RUPPEL U RUST DR RYLKO R SACHS K SARKISYAN EKG SASAKI M SBARRA C SCHAILE AD SCHAILE O SCHARF F SCHARFFHANSEN P SCHENK P SCHMITT B SCHMITT S SCHRODER M SCHULTZCOULON HC SCHULZ M SCHUMACHER M SCHUTZ P SCOTT WG SHEARS TG SHEN BC SHEPHERDTHEMISTOCLEOUS CH SHERWOOD P SIROLI GP SITTLER A SKILLMAN A SKUJA A SMITH AM SMITH TJ SNOW GA SOBIE R SOLDNERREMBOLD S SPRINGER RW SPROSTON M STAHL A STARKS M STEIERT M STEPHENS K STEUERER J STOCKHAUSEN B STROM D STRUMIA F SZYMANSKI P TAFIROUT R TALBOT SD TANAKA S TARAS P TAREM S TECCHIO M THIERGEN M THOMSON MA VONTORNE E TOWERS S TSUKAMOTO T TSUR E TURCOT AS TURNERWATSON MF UTZAT P VANKOOTEN R VASSEUR G VERZOCCHI M VIKAS P VINCTER M VOKURKA EH WACKERLE F WAGNER A WARD CP WARD DR WARD JJ WATKINS PM WATSON AT WATSON NK WEBER P WELLS PS WERMES N WHITE JS WILKENS B WILSON GW WILSON JA WOLF G WOTTON S WYATT TR YAMASHITA S YEKUTIELI G ZACEK V
Citation
G. Alexander et al., SEARCH FOR UNSTABLE NEUTRAL AND CHARGED HEAVY-LEPTONS IN E(-) COLLISIONS AT ROOT-S=130 AND 136 GEV()E(), Physics letters. Section B, 385(1-4), 1996, pp. 433-444
Citations number
31
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
385
Issue
1-4
Year of publication
1996
Pages
433 - 444
Database
ISI
SICI code
0370-2693(1996)385:1-4<433:SFUNAC>2.0.ZU;2-P
Abstract
Searches for unstable neutral and charged heavy leptons (L(0), L(+/-)) have been performed using a data sample of 2.6 pb(-1) at a centre-of- mass energy of root s = 130 GeV and 2.6 pb(-1) at 136 GeV collected wi th the OPAL detector at LEP during November 1995, No candidate event w as observed. If an unstable Dirac neutral heavy lepton L(0) decays onl y into eW, mu W* or tau W*, the lower limits on its mass at 95% C.L. are 62.5 GeV, 63.0 GeV and 57.4 GeV, respectively. The Limits are modi fied for a Majorana L(0) to 51.4 GeV, 52.2 GeV and 44.2 GeV, respectiv ely, For charged heavy leptons, a lower mass limit of 64.5 GeV at 95% C.L. was obtained, if L+/- decays into a stable heavy neutrino nu(L) a nd W-+/-, and if m(L+/-) - m(nu L) > 10 GeV. If L(+/-) decays through lepton flavour mixing into a massless neutrino yr and W-+/-, the low er limit on m(L) was determined to be 63.9 GeV at 95% C.L.