6533b872fe1ef96bd12d42e8

RESEARCH PRODUCT

Inclusive semileptonic branching ratios of b hadrons produced in Z decays

A. MessineoO. BuchmullerPierluigi CampanaM. Pepe-altarelliEric LanconR. TenchiniR. TenchiniG. MerinoM. SwynghedauwB. MichelP. MatoB.s. NilssonF. MurtasP. G. VerdiniE. LocciMassimo AntonelliC. RaineJ. KileJohn T HarveyMarkus FrankWerner WiedenmannS. XueE. TournefierE. TournefierG. QuastJf RenardyA. AntonelliS. DhamotharanG. B. TaylorP. TempestaA. JacholkowskaK. AffholderbachK. AffholderbachA. RanieriJohn H. L. HansenGy. WolfK. ZachariadouArno HeisterP. CoyleG. CaponL. DuflotB. PietrzykJ. RanderA. RougéFrancesco RagusaF. CombleyG. A. CowanJ.p. SchullerM. AleppoP. JanotG. MaggiZiad AjaltouniV. ChiarellaG. SelvaggiP. SpagnoloW. OrejudosG. BencivenniBarbara ClerbauxGeorg ZobernigA. PutzerC. K. BowderyPedro Teixeira-diasG. R. BonneaudD. CreanzaM H. LehtoGiuseppe RasoD.p.s. FergusonG.a. BlairG. GianniniB. Bloch-devauxB. Bloch-devauxG. SanguinettiG. BolognaLei ZhangA. ColaleoM. G. GreenB. RenkPierre HenrardF. PodlyskiJ. A. StrongH. HuE. SimopoulouP. PerezG. RudolphKarl JakobsEvelina Vassileva Bouhova-thackerF. BossiVal O'sheaP. GirtlerE. FocardiXin WuP. ElmerPh. HeusseA. RoussarieJean-claude MontretJ. BoucrotJ. CarrM. DavierE. GraugesLorenzo FoàI. GiehlL. SilvestrisG. IaselliJ. RothbergM.r. PearsonY. B. PanJ. J. WalshT. BoccaliJ. K. SedgbeerAlan M. LitkeA. TrabelsiA. TrabelsiF. PallaStephane MonteilPaul HankeChristian ZeitnitzF. RuggieriE. RohneA. GiassiPeter HansenA. VayakiS. BrandtStefan SchaelOlivier LeroyM. De PalmaT. MedcalfR. XuA. SciabàH. DietlJ.j. WardJ. J. VeilletC. N. BoothAlain BonissentO.j. HayesR. SettlesW. CameronK. HüttmannG. PrangeS. L. CartwrightGiuseppe ZitoN. A. RobertsonD. M. BinnieM. Fernandez-bosmanQ. OuyangJiali LinJ.c. ThompsonJ.c. ThompsonJ. JoussetH. VideauJ H. Von Wimmersperg-tollerGünther DissertoriJohn-bjarne HansenV. HeppM.-n. MinardL. M. MirX. HuangYuehong XieB. JostT. R. EdgecockClaus GrupenL. GarridoL. GarridoO. CallotM. MaggiO. SchneiderO. SchneiderP. AzzurriI.j. ScottS. W. K. EmeryH. G. SanderV. M. GheteG.p. MurtasMarco CattaneoJie ZhangD. AbbaneoL. PassalacquaDominique PallinF. BadaudA. VenturiS. BravoR. W. ClifftC. MannertW. KozaneckiPascal PerretY. S. GaoY. S. GaoB. VallageJ.g. LynchI. R. TomalinLester D.r. ThompsonRoger FortyMaria Pilar CasadoC. MarkouI. VideauJ. SchwindlingW. MännerC. GoyD. RousseauM. RumpfY. SaadiH. G. MoserS. NuzzoMarumi KadoL. RolandiMossadek TalbyC. GewenigerT. W. WangAlexander FinchS.r. ArmstrongG. LütjensA. MoutoussiD. KuhnD. DecampE. MerleS. GonzalezAndrea GiammancoT.c. GreeningT.c. GreeningK. TittelG. HansperKonrad KleinknechtG. HughesM. WunschJ. C. BrientM. C. LemaireU. SielerE. E. KlugeN. MarinelliG. BagliesiKyle CranmerW. TejessyN. KonstantinidisF. FosterA. PachecoRoger JonesRoger JonesF. LigabueJ. NielsenA. MisiejukS. JinA. NgacAlain FalvardMaria GironeMaria GironeS. WasserbaechG. GanisG. GanisHasko StenzelM. ChmeissaniR. CavanaughA. WäänänenG. ParriniSau Lan WuJ. D. HansenP. PayreJ. M. CrespoP. ColasH. DrevermannM. MartinezRamon MiquelA. S. ThompsonP. R. NortonF. CeruttiChang-zheng YuanJ. P. LeesR. BeuselinckV. CiulliA. BöhrerH. RuizM. VerderiF. RanjardG. MannocchiEmmerich KneringerF. TeubertJ. LefrançoisA. BlondelR. BarateI. De BonisH. WachsmuthG. BoixD. SchlatterJean-francois GrivazA. TricomiP. NegusP. J. DornanA. DavidE. FernandezA. KyriakisS. Werner

subject

Particle physicsAleph[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex]Physics and Astronomy (miscellaneous)MesonElectron–positron annihilationHadronFOS: Physical sciencesElectron7. Clean energy01 natural sciencesHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]010306 general physicsEngineering (miscellaneous)PhysicsMuon010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyCascadeHigh Energy Physics::ExperimentParticle Physics - ExperimentLepton

description

A measurement of the inclusive semileptonic branching ratios of b hadrons produced in Z decay is presented, using four million hadronic events collected by the ALEPH detector from 1991 to 1995. Electrons and muons are selected opposite to b-tagged hemispheres. Two different methods are explored to distinguish the contributions from direct $\bl$ and cascade $\bcl$ decays to the total lepton yield. One is based on the lepton transverse momentum spectrum, the other makes use of the correlation between the charge of the lepton and charge estimators built from tracks in the opposite hemisphere of the event. The latter method reduces the dependence on the modelling of semileptonic b decays. The results obtained by averaging the two techniques are BR(b->l) = 0.1070 +- 0.0010 +- 0.0023 +- 0.0026 BR(b->c->l) = 0.0818 +- 0.0015 +- 0.0022 + 0.0022 -0.0014

yearjournalcountryeditionlanguage
2001-08-02The European Physical Journal C
https://doi.org/10.1007/s100520100851