6533b82efe1ef96bd1293450

RESEARCH PRODUCT

Measurement of the Z$^0$ branching fraction to b quark pairs using the boosted sphericity product

P. AbreuW. AdamF. AdamiT. AdyeT. AkessonG. D. AlekseevP. AllenS. AlmehedS. J. AlvsvaagU. AmaldiE. AnassontzisP. AntilogusW. D. ApelR. J. ApsimonB. AsmanJ. -E AugustinA. AugustinusP. BaillonP. BambadeF. BaraoR. BarateGuido BarbielliniD. Yu BardinA. BaroncelliO. BarringW. BartlM. J. BatesM. BattagliaM. BaubillierK. H. BecksC. J. BeestonM. BegalliP. BeilliereYu. BelokopytovP. BeltranD. BenedicJ. M. BenllochM. BerggrenD. BertrandF. BianchiM. S. BilenkiiP. BilloirJ. BjarneD. BlochS. BlythV. BocciP. N. BogolubovT. BologneseM. BonesiniW. BoniventoP. S. L. BoothP. BorgeaudG. BorisovH. BornerC. BosioB. BostjancicO. BotnerB. BouquetC. BourdariosT. J. V. BowcockM. BozzoS. BraibantP. BranchiniK. D. BrandR. A. BrennerH. BriandC. BricmanR. C. A. BrownN. BrummerJ. M. BrunetL. BuggeT. BuranH. BurmeisterJ. A. M. A. BuytaertM. CacciaM. CalviA. J. Camacho RozasT. CamporesiV. CanaleF. CaoF. CarenaL. CarrollC. CasoE. CastelliM. V. Castillo GimenezA. CattaiF. R. CavalloL. CerritoA. ChanM. ChapkinP. CharpentierL. ChaussardJ. ChauveauP. ChecchiaG. A. ChelkovL. ChevalierP. ChliapnikovV. ChorowiczR. CirioM. P. ClaraP. CollinsJ. L. ContrerasR. ContriG. CosmeF. CouchotH. B. CrawleyD. CrennellG. CrosettiM. CrozonJ. Cuevas MaestroS. CzellarSylvie DagoretE. Dahl-jensenB. D. AlmagneM. DamG. DamgaardG. DarboE. DaubieP. D. DaunceyM. DavenportP. DavidW. Da SilvaC. DefoixD. DelikarisS. DelormeP. DelpierreN. DemariaA. AngelisM. BeerH. BoeckW. BoerC. ClercqM. D. M. Fez LasoN. GrootC. La VaissiereB. LottoA. MinH. DijkstraL. Di CiaccioF. DjamaJ. DolbeauM. DonszelmannK. DorobaM. DracosJ. DreesM. DrisY. DufourW. DulinskiL. O. EekP. A. EerolaT. EkelofG. EkspongA. Elliot PeisertJ. P. EngelD. FassouliotisM. FeindtM. Fernandez AlonsoA. FerrerT. A. FilippasA. FirestoneH. FoethE. FokitisP. FolegatiF. FontanelliK. A. J. ForbesB. FranekP. FrenkielD. C. FriesA. G. FrodesenR. FruhwirthF. Fulda-quenzerK. FurnivalH. FurstenauJ. FusterG. GaleazziD. GambaC. GarciaJ. GarciaC. GasparU. GaspariniP. GavilletE. N. GazisJ. P. GerberP. GiacomelliR. GokieliV. M. GolovatyukY. Cadenas J. J. GomezA. GoobarG. GopalM. GorskiV. GraccoA. GrantF. GrardE. GrazianiG. GrosdidierE. GrossP. Grosse-wiesmannB. GrosseteteS. GumenyukJ. GuyF. HahnM. HahnS. HaiderZ. HajdukA. HakanssonA. HallgrenK. HamacherG. Hamel MonchenaultW. HaoF. J. HarrisB. W. HeckT. HenkesJ. J. HernandezP. HerquetH. HerrT. L. HessingI. HietanenC. O. HigginsE. HigonH. J. HilkeS. D. HodgsonT. HofmoklR. HolmesS. O. HolmgrenD. HolthuizenP. F. HonoreJ. E. HooperM. HouldenJ. HrubecP. O. HulthK. HultqvistD. HussonP. IoannouD. IsenhowerP. S. IversenJ. N. JacksonP. JalochaG. JarlskogP. JarryB. Jean-marieE. K. JohanssonD. JohnsonM. JonkerL. JonssonP. JuillotG. KalkanisG. KalmusF. KapustaM. KarlssonS. KatsanevasE. C. KatsoufisR. KeranenJ. KestemanB. A. KhomenkoN. N. KhovanskiB. KingN. J. KjaerH. KleinW. KlemptA. KlovningP. KluitJ. H. KohneB. KoeneP. KokkiniasM. KopfM. KoratzinosK. KorcylA. V. KorytovV. KostioukhineC. KourkoumelisP. H. KramerT. KreuzbergerJ. KrolikowskiI. KronkvistJ. KrsticU. Kruner-marquisW. KrupinskiW. KucewiczK. KurvinenC. LacastaC. LambropoulosJ. W. LamsaL. LanceriV. LapinJ. P. LaugierR. LauhakangasG. LederF. LedroitR. LeitnerY. LemoigneJ. LemonneG. LenzenV. LepeltierA. Letessier-selvonE. LiebD. LikoE. LillethunJ. LindgrenR. LindnerA. LipniackaI. LippiR. LlosaB. LorstadM. LokajicekJ. G. LokenA. Lopez-fernandezM. A. Lopes AgueraM. LosD. LoukasA. LounisJ. J. LozanoP. LutzL. LyonsG. MaehlumJ. MaillardA. MaltezosF. MandlJ. MarcoM. MargoniJ. C. MarinA. MarkouT. MaronS. MartiL. MathisF. MatorrasC. MatteuzziG. MatthiaeM. MazzucatoM. MccubbinR. MckayR. McnultyE. MenichettiG. MeolaC. MeroniW. T. MeyerM. MichelottoW. A. MitaroffG. MitselmakherU. MjornmarkT. MoaR. MollerK. MonigM. R. MongeP. MorettiniH. MullerW. J. MurrayB. MurynG. MyattF. NaraghiF. L. NavarriaP. NegriB. S. NielsenB. NijjharV. NikolaenkoV. ObraztsovK. OesterbergA. G. OlshevskiR. OravaA. OstankovA. OuraouM. PaganoniR. PainH. PalkaT. PapadopoulouL. PapeA. PasseriM. PegoraroJ. PennanenV. PerevozchikovM. PernickaA. PerrottaF. PierreM. PimentaO. PingotM. E. PolG. PolokP. PoropatP. PriviteraA. PulliaD. RadojicicS. RagazziP. N. RatoffA. L. ReadN. G. RedaelliM. ReglerD. ReidP. B. RentonL. K. ResvanisF. RichardM. RichardsonJ. RidkyG. RinaudoI. RoditiA. RomeroI. RoncaglioloP. RoncheseC. RonnqvistE. I. RosenbergU. RossiE. RossoP. RoudeauT. RovelliW. RuckstuhlV. RuhlmannA. RuizK. RybickiH. SaarikkoY. SacquinG. SajotJ. SaltE. SanchezJ. SanchezM. SanninoM. SchaefferS. SchaelH. SchneiderM. A. E. SchynsF. ScuriA. M. SegarR. SekulinM. SessaG. SetteR. SeufertR. C. ShellardP. SiegristS. SimonettiF. SimonettoA. N. SisakianT. B. SkaaliG. SkjevlingG. SmadjaG. R. SmithR. SosnowskiT. S. SpassoffE. SpiritiS. SquarciaH. StackC. StanescuG. StavropoulosF. StichelbautA. StocchiJ. StraussJ. StraverR. StrubM. SzczekowskiM. SzeptyckaP. SzymanskiT. TabarelliS. TavernierO. ChikilevG. TheodosiouA. TilquinJ. TimmermansV. G. TimofeevL. G. TkachevT. TodorovD. Z. ToetO. TokerE. TorassaL. TortoraM. T. TrainorD. TreilleU. TrevisanW. TrischukG. TristramC. TronconA. TsirouE. N. TsyganovM. TuralaR. TurchettaM. TurluerT. TuuvaI. A. TyapkinM. TyndelS. TzamariasS. UberscharO. UllalandV. A. UvarovG. ValentiE. VallazzaJ. A. Valls FerrerC. Vander VeldeG. W. ApeldoornP. DamW. K. DoninckJ. VarelaP. VazG. VegniLaurent VenturaW. VenusF. VerbeureL. S. VertogradovD. VilanovaN. VishnevskiiL. VitaleE. V. VlasovS. VlassopulosA. S. VodopyanovM. VollmerS. VolponiG. VoulgarisM. VoutilainenV. VrbaH. WahlenC. WalckF. WaldnerM. WayneA. WehrM. WeierstallP. WeilhammerJ. WernerA. M. WetherellJ. H. WickensJ. WikneG. R. WilkinsonW. S. C. WilliamsM. WinterD. WormaldG. WormserK. WoschnaggN. YamdagniP. YepesA. ZaitsevA. ZalewskaP. ZalewskiD. ZavrtanikE. ZevgolatakosG. ZhangN. I. ZiminM. ZitoR. ZitounR. Zukanovich FunchalG. ZumerleJ. Zuniga

subject

Nuclear and High Energy PhysicsParticle physicsE+E ANNIHILATIONLUND MONTE-CARLOElectron–positron annihilationHadron01 natural sciencesBottom quarkJET FRAGMENTATIONDECAYSStandard ModelSphericityNuclear physicsPHYSICS0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]010306 general physicsNuclear ExperimentPhysics010308 nuclear & particles physicsBranching fractionHigh Energy Physics::PhenomenologyProduct (mathematics)Física nuclearHigh Energy Physics::ExperimentLUND MONTE-CARLO; JET FRAGMENTATION; E+E ANNIHILATION; PHYSICS; DECAYSParticle Physics - ExperimentLepton

description

Abstract From a sample of about 120 000 hadronic Z 0 decays, using a technique based on a separation of the different event categories in the boosted sphericity product, the fraction of b b decays has been measured to be 0.219 ± 0.014 (stat)± 0.019 (syst). Using the DELPHI determination of the hadronic Z 0 width, this corresponds to a partial width τ b b = 378 ± 42 MeV (in good agreement with the standard model prediction of ∼-380 MeV). Combining this measurement with the determinations based on events with high p t leptons gives an estimate for the branching ratio of b into leptons at LEP of (11.2 ± 1.2)%, consistent with previous determinations.

http://hal.in2p3.fr/in2p3-00001243