LIFETIME AND PRODUCTION-RATE OF BEAUTY BARYONS FROM Z-DECAYS

Authors
ABREU P ADAM W ADYE T AGASI E AJINENKO I ALEKSAN R ALEKSEEV GD ALLPORT PP ALMEHED S ALVSVAAG SJ AMALDI U AMATO S ANDREAZZA A ANDRIEUX ML ANTILOGUS P APEL WD ARNOUD Y ASMAN B AUGUSTIN JE AUGUSTINUS A BAILLON P BAMBADE P BARAO F BARATE R BARBIELLINI G BARDIN DY BARKER GJ BARONCELLI A BARING O BARRIO JA BARTL W BATES MJ BATTAGLIA M BAUBILLIER M BAUDOT J BECKS KH BEGALLI M BEILLIERE P BELOKOPYTOV Y BENVENUTI AC BERGGREN M BERTRAND D BIANCHI F BIGI M BILENKY MS BILLOIR P BLOCH D BLUME M BLYTH S BOCCI V BOLOGNESE T BONESINI M BONIVENTO W BOOTH PSL BORISOV G BOSIO C BOSWORTH S BOTNER O BOUQUET B BOURDARIOS C BOWCOCK TJV BOZZO M BRANCHINI P BRAND KD BRENNER RA BRICMAN C BRILLAULT L BROWN RCA BRUCKMAN P BRUNET JM CANKOCAK K CAO F CARENA F CARRILHO P CARROLL L CASO C GIMENEZ MVC CATTAI A CAVALLO FR CERRITO L CHABAUD V CHAPKIN M CHARPENTIER P CHAUSSARD L CHAUVEAU J CONTRERAS JL CONTRI R CORTINA E COSME G COSSUTTI F CRAWLEY HB CRENNELL D CROSETTI G MAESTRO JC CZELLAR S DAHLJENSEN E DAHM J DALMAGNE B DAM M DAMGAARD G DAUM A DAUNCEY PD DAVENPORT M DASILVA W DEFOIX C DELLARICCA G DELPIERRE P DEMARIA N DEANGELIS A DEBOECK H DEBOER W DEBRABANDERE S DECLERCQ C DELAVAISSIERE C DELOTTO B DEMIN A DEPAULA L DESAINTJEAN C DIJKSTRA H DICIACCIO L DJAMA F DOLBEAU J DONSZELMANN M DOROBA K DRACOS M DREES J DREES KA DRIS M DUFOUR Y DUPONT F EDSALL D EHRET R EIGEN G EKELOF T EKSPONG G ELSING M ENGEL JP ERSHAIDAT N ERZEN B SANTO ME FALK E FASSOULIOTIS D FEINDT M FENYUK A FERRER A FILIPPAS TA FIRESTONE A FOETH H FOKITIS E FONTANELLI F FORMENTI F FRANEK B FRENKIEL P FRIES DC FRODESEN AG FRUHWIRTH R FULDAQUENZER F FURSTENAU H FUSTER J GALLONI A GAMBA D GANDELMAN M GARCIA C GARCIA J GASPAR C GASPARINI U GAVILLET P GAZIS EN GELE D GERBER JP GIBBS M GILLESPIE D GOKIELI R GOLOB B GOPAL G GORN L GORSKI M GRACCO V GRAZIANI E GROSDIDIER G GUNNARSSON P GUNTHER M GUY J HAEDINGER U HAHN F HAHN M HAHN S HAJDUK Z HALLGREN A HAMACHER K HAO W HARRIS FJ HEDBERG V HENRIQUES R HERNANDEZ JJ HERQUET P HERR H HESSING TL HIGON E HILKE HJ HILL TS HOLMGREN SO HOLT PJ HOLTHUIZEN D HOULDEN M HRUBEC J HUET K HULTQVIST K IOANNOU P JACKSON JN JACOBSSON R JALOCHA P JANIK R JARLSKOG G JARRY P JEANMARIE B JOHANSSON EK JONSSON L JONSSON P JORAM C JUILLOT P KAISER M KALMUS G KAPUSTA F KARLSSON M KARVELAS E KATSANEVAS S KATSOUFIS EC KERANEN R KHOMENKO BA KHOVANSKI NN KING B KJAER NJ KLEIN H KLOVNING A KLUIT P KOEHNE JH KOENE B KOKKINIAS P KORATZINOS M KOSTIOUKHINE V KOURKOUMELIS C KOUZNETSOV O KRAMER PH KRAMMER M KREUTER C KROLIKOWSKI J KRONKVIST I KRUMSTEIN Z KRUPINSKI W KUBINEC P KUCEWICZ W KURVINEN K LACASTA C LAKTINEH I LAMBLOT S LAMSA JW LANCERI L LANE DW LANGEFELD P LAPIN V LAST I LAUGIER JP LAUHAKANGAS R LEDER G LEDROIT F LEFEBURE V LEGAN CK LEITNER R LEMOIGNE Y LEMONNE J LENZEN G LEPELTIER V LESIAK T LIKO D LINDNER R LIPNIACKA A LIPPI I LOERSTAD B LOKAJICEK M LOKEN JG LOPEZ JM LOPEZFERNANDEZ A AGUERA MAL LOUKAS D LUTZ P LYONS L MACNAUGHTON J MAEHLUM G MAIO A MALYCHEV V MANDL F MARCO J MARECHAL B MARGONI M MARIN JC MARIOTTI C MARKOU A MARON T MARTINEZRIVERO C MARTINEZVIDAL F GARCIA SM MATORRAS F MATTENUZZI C MATTHIAE G MAZZUCATO M MCCUBBIN M MCKAY R MCNULTY R MEDBO J MERONI C MEYER WT MICHELOTTO M MIGLIORE P MUELLER H MUNDIM LM MURRAY WJ MURYN B MYATT G NARAGHI F NAVARRIA FL NAVAS S NEGRI P NEMECEK S NEUMANN W NEUMEISTER N NICOLAIDOU R NIELSEN BS NIEUWENHUIZEN M NIKOLAENKO V NISS P NOMEROTSKI A NORMAND A OBERSCHULTEBECKMANN W OBRAZTSOV V OLSHEVSKI AG ONOFRE A ORAVA R OSTANKOV A OSTERBERG K OURAOU A PAGANINI P PAGANONI M PAGES P PALKA H PAPADOPOULOU TD PAPE L PARKES C PARODI F PASSERI A PEGORARO M PERALTA L PERNEGGER H PERNICKA M PERROTTA A PETRIDOU C PETROLINI A PHILLIPS HT PIANA G PIERRE F PLASZCZYNSKI S PODOBRIN O POL ME POLOK G POROPAT P POZDNIAKOV V PREST M PRIVITERA P PUKHAEVA N PULLIA A RADOJICIC D RAGAZZI S RAHMANI H RAMES J RATOFF PN READ AL REALE M REBECCHI P REDAELLI NG REID D RENTON PB RESVANIS LK RICHARD F RICHARDSON J RIDKY J RINAUDO G RIPP I ROMERO A RONCAGLIOLO I RONCHESE P ROOS L ROSENBERG EI ROSSO E ROUDEAU P ROVELLI T RUCKSTUHL W RUHLMANNKLEIDER V RUIZ A RYBICKI K SAARIKKO H SACQUIN Y SADOVSKY A SAJOT G SALT J SANCHEZ J SANNINO M SCHNEIDER H SCHYNS MAE SCIOLLA G SCURI F SEDYKH Y SEGAR AM SEITZ A SEKULIN R SHELLARD RC SICCAMA I SIEGRIST P SIMONETTI S SIMONETTO F SISAKIAN AN SITAR B SKAALI TB SMADJA G SMIRNOV N SMIRNOVA O SMITH GR SOSNOWSKI R SOUZASANTOS D SPASSOV T SPIRITI E SQUARCIA S STAECK H STANESCU C STAPNES S STAVITSKI I STEPANIAK K STICHELBAUT F STOCCHI A STRAUSS J STRUB R STUGU B SZCZEKOWSKI M SZEPTYCKA M TABARELLI T TAVERNET JP TCHIKILEV O TILQUIN A TIMMERMANS J TKATCHEV LG TODOROV T TOET DZ TOMARADZE A TOME B TORASSA E TORTORA L TRANSTROMER G TREILLE D TRISCHUK W TRISTRAM G TROMBINI A TRONCON C TSIROU A TURLUER ML TYAPKIN LA TYNDEL M TZAMARIAS S UEBERSCHAER B UEBERSCHAER S ULLALAND O UVAROV V VALENTI G VALLAZZA E VANAPELDOORN GW VANDAM P VANDONINCK WK VANELDIK J VASSILOPOULOS V VEGNI G VENTURA L VENUS W VERBEURE F VERLATO M VERTOGRADOV LS VILANOVA D VINCENT P VITALE L VLASOV E VODOPYANOV AS VRBA V WAHLEN H WALCK C WEHR A WEIERSTALL M WEILHAMMER P WETHERELL AM WICKE D WICKENS JH WIELERS M WILKINSON GR WILLIAMS WSC
Citation
P. Abreu et al., LIFETIME AND PRODUCTION-RATE OF BEAUTY BARYONS FROM Z-DECAYS, Zeitschrift fur Physik. C, Particles and fields, 68(3), 1995, pp. 375-390
Citations number
20
Categorie Soggetti
Physics, Particles & Fields
Journal title
Zeitschrift fur Physik. C, Particles and fields → ACNP
ISSN journal
01709739
Volume
68
Issue
3
Year of publication
1995
Pages
375 - 390
Database
ISI
SICI code
0170-9739(1995)68:3<375:LAPOBB>2.0.ZU;2-Y
Abstract
The production and decay of beauty baryons (b-baryons) have been studi ed using 1.7 x 10(6) Z hadronic decays collected by the DELPHI detecto r at LEP. Three different techniques were used to identify the b-baryo ns. The first method used pairs of a Lambda and a lepton to tag the b- baryon decay. The second method associated fully reconstructed Lambda( c) baryons with leptons. The third analysis reconstructed the b-baryon decay points by forming secondary vertices from identified protons an d muons of opposite sign. Using these methods the following production rates were measured: f(b --> b-baryon) x BR(b-baryon --> Lambda l nu( l)X) = (0.30 +/- 0.06 +/- 0.04)%, f(b --> b-baryon) x BR(b-baryon --> Lambda(c)l nu(l)X) = (1.18 +/- 0.26(-0.21)(+0.31)%, f(b --> b-baryon) x BR(b-baryon --> p mu nu(mu)X) = (0.49 +/- 0.11 +/- (+0.15)(-0.11)%. The average b-baryon lifetime was determined to be: tau = 1.21(-0.18)( +.21)(stat.) +/- 0.04(exp.syst.)(-.07)(+.02)(th.syst,) ps.