DETERMINATION OF ALPHA(S) FOR B-QUARKS AT THE Z(0) RESONANCE

Authors
ABREU P ADAM W ADYE T AGASI E ALEKSAN R ALEKSEEV GD ALGERI A ALLEN P ALMEHED S ALVSVAAG SJ AMALDI U ANDREAZZA A ANTILOGUS P APEL WD APSIMON RJ ARNOUD Y ASMAN B AUGUSTIN JE AUGUSTINUS A BAILLON P BAMBADE P BARAO F BARATE R BARBIELLINI G BARDIN DY BARKER GJ BARONCELLI A BARRING O BARRIO JA BARTL W BATES MJ BATTAGLIA M BAUBILLIER M BECKS KH BEESTON CJ BEGALLI M BEILLIERE P BELOKOPYTOV Y BELTRAN P BENEDIC D BENVENUTI AC BERGGREN M BERTRAND D BIANCHI F BILENKY MS BILLOIR P BJARNE J BLOCH D BLYTH S BOCCI V BOGOLUBOV PN BOLOGNESE T BONESINI M BONIVENTO W BOOTH PSL BORISOV G BORNER H BOSIO C BOSTJANCIC B BOSWORTH S BOTNER O BOUQUET B BOURDARIOS C BOWCOCK TJV BOZZO M BRAIBANT S BRANCHINI P BRAND KD BRENNER RA BRIAND H BRICMAN C BROWN RCA BRUMMER N BRUNET JM BUGGE L BURAN T BURMEISTER H BUYTAERT JAMA CACCIA M CALVI M ROZAS AJC CAMPION R CAMPORESI T CANALE V CAO F CARENA F CARROLL L CASO C GIMENEZ MVC CATTAI A CAVALLO FR CERRITO L CHABAUD V CHAN A CHARPENTIER P CHAUSSARD L CHAUVEAU J CHECCHIA P CHELKOV GA CHEVALIER L CHLIAPNIKOV P CHOROWICZ V CHRIN JTM COLLINS P CONTRERAS JL CONTRI R CORTINA E COSME G COUCHOT F CRAWLEY HB CRENNELL D CROSETTI G CROZON M MAESTRO JC CZELLAR S DAHLJENSEN E DALMAGNE B DAM M DAMGAARD G DAUBIE E DAUM A DAUNCEY PD DAVENPORT M DAVID P DAVIES J DASILVA W DEFOIX C DELPIERRE P DEMARIA N DEANGELIS A DEBOECK H DEBOER W DECLERCQ C LASO MDMD DEGROOT N DELAVAISSIERE C DELOTTO B DEMIN A DIJKSTRA H DICIACCIO L DOLBEAU J DONSZELMANN M DOROBA K DRACOS M DREES J DRIS M DUFOUR Y DUPONT F EDSALL D EEK LO EEROLA PAM EHRET R EKELOF T EKSPONG G PEISERT AE ENGEL JP ERSHAIDAT N FASSOULIOTIS D FEINDT M ALONSO MF FERRER A FILIPPAS TA FIRESTONE A FOETH H FOKITIS E FONTANELLI F FORBES KAJ FOUSSET JL FRANCON S FRANEK B FRENKIEL P FRIES DC FRODESEN AG FRUHWIRTH R FULDAQUENZER F FURNIVAL K FURSTENAU H FUSTER J GAMBA D GARCIA C GARCIA J GASPAR C GASPARINI U GAVILLET P GAZIS EN GERBER JP GIACOMELLI P GOKIELI R GOLOB B GOLOVATYUK VM CADENAS JJGY GOPAL G GORSKI M GRACCO V GRANT A GRARD F GRAZIANI E GROSDIDIER G GROSS E GROSSEWIESMANN P GROSSETETE B GUMENYUK S GUY J HAEDINGER U HAHN F HAHN M HAIDER S HAKANSSON A HALLGREN A HAMACHER K DEMONCHENAULT GH HAO W HARRIS FJ HEDBERG V HENKES T HERNANDEZ JJ HERQUET P HERR H HESSING TL HIETANEN I HIGGINS CO HIGON E HILKE HJ HODGSON SD HOFMOKL T HOLMES R HOLMGREN SO HOLTHUIZEN D HONORE PF HOOPER JE HOULDEN M HRUBEC J HUET K HULTH PO HULTQVIST K IOANNOU P IVERSEN PS JACKSON JN JALOCHA P JARLSKOG G JARRY P JEANMARIE B JOHANSSON EK JOHNSON D JONKER M JONSSON L JUILLOT P KALKANIS G KALMUS G KAPUSTA F KARLSSON M KARVELAS E KATSANEVAS S KATSOUFIS EC KERANEN R KESTEMAN J KHOMENKO BA KHOVANSKI NN KING B KJAER NJ KLEIN H KLOVNING A KLUIT P KOCHMEHRIN A KOEHNE JH KOENE B KOKKINIAS P KORATZINOS M KORYTOV AV KOSTIOUKHINE V KOURKOUMELIS C KOUZNETSOV O KRAMER PH KROLIKOWSKI J KRONKVIST I KRUENERMARQUIS U KRUPINSKI W KULKA K KURVINEN K LACASTA C LAMBROPOULOS C LAMSA JW LANCERI L LAPIN V LAUGIER JP LAUHAKANGAS R LEDER G LEDROIT F LEITNER R LEMOIGNE Y LEMONNE J LENZEN G LEPELTIER V LESIAK T LEVY JM LIEB E LIKO D LINDGREN J LINDNER R LIPNIACKA A LIPPI I LOERSTAD B LOKAJICEK M LOKEN JG LOPEZFERNANDEZ A AGUERA MAL LOS M LOUKAS D LOZANO JJ LUTZ P LYONS L MAEHLUM G MAILLARD J MAIO A MALTEZOS A MANDL F MARCO J MARGONI M MARIN JC MARKOU A MARON T MARTI S MATHIS L MATORRAS F MATTEUZZI C MATTHIAE G MAZZUCATO M MCCUBBIN M MCKAY R MCNULTY R MEOLA G MERONI C MEYER WT MICHELOTTO M MIKULEC I MIRABITO L MITAROFF WA MITSELMAKHER GV MJOERNMARK U MOA T MOELLER R MOENIG K MONGE MR MORETTINI P MUELLER H MURRAY WJ MURYN B MYATT G NAVARRIA FL NEGRI P NICOLAIDOU R NIELSEN BS NIJJHAR B NIKOLAENKO V NILSEN PES NISS P NOMEROTSKI A OBRAZTSOV V OLSHEVSKI AG ORAVA R OSTANKOV A OSTERBERG K OURAOU A PAGANONI M PAIN R PALKA H PAPADOPOULOU TD PAPE L PARODI F PASSERI A PEGORARO M PENNANEN J PERALTA L PERNEGGER H PERNICKA M PERROTTA A PETRIDOU C PETROLINI A PETROVYKH O PIERRE F PIMENTA M PINGOT O PLASZCZYNSKI S PODOBRIN O POL ME POLOK G POROPAT P POZDNIAKOV V PRIVITERA P PULLIA A RADOJICIC D RAGAZZI S RAHMANI H RATOFF PN READ AL REBECCHI P REDAELLI NG REGLER M REID D RENTON PB RESVANIS LK RICHARD F RICHARDSON M RIDKY J RINAUDO G RODITI I ROMERO A RONCAGLIOLO I RONCHESE P RONNQVIST C ROSENBERG EI ROSSI S ROSSO E ROUDEAU P ROVELLI T RUCKSTUHL W RUHLMANNKLEIDER V RUIZ A RYBICKI K SAARIKKO H SACQUIN Y SAJOT G SALT J SANCHEZ J SANNINO M SCHAEL S SCHNEIDER H SCHYNS MAE SCIOLLA G SCURI F SEGAR AM SEITZ A SEKULIN R SESSA M SETTE G SEUFERT R SHELLARD RC SICCAMA I SIEGRIST P SIMONETTI S SIMONETTO F SISAKIAN AN SKJEVLING G SMADJA G SMIRNOV N SMIRNOVA O SMITH GR SOSNOWSKI R SOUZASANTOS D SPASSOFF TS SPIRITI E SQUARCIA S STAECK H STANESCU C STAPNES S STAVROPOULOS G STICHELBAUT F STOCCHI A STRAUSS J STRAVER J STRUB R STUGU B SZCZEKOWSKI M SZEPTYCKA M SZYMANSKI P TABARELLI T TCHIKILEV O THEODOSIOU GE TILQUIN A TIMMERMANS J TIMOFEEV VG TKATCHEV LG TODOROV T TOET DZ TOKER O TOME B TORASSA E TORTORA L TREILLE D TREVISAN U TRISCHUK W TRISTRAM G TRONCON C TSIROU A TSYGANOV EN TURALA M TURLUER ML TUUVA T TYAPKIN IA TYNDEL M TZAMARIAS S UEBERSCHAER S ULLALAND O UVAROV V VALENTI G VALLAZZA E FERRER JAV VANDERVELDE C VANAPELDOORN GW VANDAM P
Citation
P. Abreu et al., DETERMINATION OF ALPHA(S) FOR B-QUARKS AT THE Z(0) RESONANCE, Physics letters. Section B, 307(1-2), 1993, pp. 221-236
Citations number
75
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
307
Issue
1-2
Year of publication
1993
Pages
221 - 236
Database
ISI
SICI code
0370-2693(1993)307:1-2<221:DOAFBA>2.0.ZU;2-M
Abstract
The strong coupling constant for b quarks has been determined, and its flavour independence, as predicted by QCD, investigated. The analysis involved events with lepton candidates selected from approximately 35 6 000 hadronic decays of the Z0, collected by the DELPHI detector at L EP in 1990 and 199 1. A method based on a direct comparison of the thr ee-jet fraction in a b enriched sample, selected by requiring leptons with large momenta and transverse momenta, to that of the entire hadro nic sample, illustrated the significant effect of the b quark mass on the multi-jet cross section, and verified the flavour independence of the strong coupling constant to an accuracy of +/- 6%. A second proced ure based on a fit to the momentum and transverse momentum spectra of the lepton candidates in both two-jet and three (or more)-jet event sa mples simultaneously determined the b content in each, and, using seco nd order QCD calculations, gave an absolute measurement of alpha(s) fo r b quarks of 0. 1 18 +/- 0.004 (stat.) +/- 0.003 (syst.) +/- 0.008 (s cale). A comparison with a, for all quark flavours, as measured from t he three-jet fraction in all hadronic events, further allowed the coup ling strength for b quarks to be expressed in terms relative to that f or udsc quarks, thereby cancelling certain common systematic uncertain ties, and yielded alpha(s)b/alpha(s)udsc = 1.00 +/- 0.04 (stat.) +/- 0 .03 (syst.).