6533b852fe1ef96bd12aac62

RESEARCH PRODUCT

Classification of the hadronic decays of the Z$^0$ into b and c quark pairs using a neural network

P. AbreuW. AdamT. AdyeE. AgasiG. D. AlekseevA. AlgeriP. AllenS. AlmehedS. J. AlvsvaagU. AmaldiE. G. AnassontzisA. AndreazzaP. AntilogusW. D. ApelR. J. ApsimonB. AsmanJ. E. AugustinA. AugustinusP. BaillonP. BambadeF. BaraoR. BarateG. BarbielliniD. Y. BardinG. BarkerA. BaroncelliO. BarringJ. A. BarrioW. BartlM. J. BatesM. BattagliaM. BaubillierK. H. BecksC. J. BeestonM. BegalliP. BeilliereY. BelokopytovP. BeltranD. BenedicA. C. BenvenutiM. BerggrenD. BertrandF. BianchiM. S. BilenkyP. BilloirJ. BjarneD. BlochS. BlythV. BocciP. N. BogolubovT. BologneseM. BonesiniW. Bonivento P. S. L.P. BorgeaudG. BorisovH. BornerC. BosioB. BostjancicS. BosworthO. BotnerB. BouquetC. Bourdarios T. J. V.M. BozzoS. BraibantP. BranchiniK. D. BrandR. A. BrennerH. BriandC. Bricman R. C. A.N. BrummerJ. M. BrunetL. BuggeT. BuranH. Burmeister J. A. M.M. CacciaM. Calvi A. J. C.T. CamporesiV. CanaleF. CaoF. CarenaL. CarrollC. Caso M. V. C.A. CattaiF. R. CavalloL. CerritoV. ChabaudA. ChanP. CharpentierL. ChaussardJ. ChauveauP. ChecchiaG. A. ChelkovL. ChevalierP. ChliapnikovV. Chorowicz J. T. M.M. CiuchiniM. P. ClaraP. CollinsJ. L. ContrerasR. ContriE. CortinaG. CosmeG. CosmoF. CouchotH. B. CrawleyD. CrennellG. CrosettiM. CrozonJ. C. MaestroS. CzellarE. DahljensenB. DalmagneM. DamG. DamgaardG. DarboE. DaubieA. DaumP. D. DaunceyM. DavenportP. DavidW. DasilvaC. DefoixD. DelikarisS. DelormeP. DelpierreP. DelgiudiceN. DemariaA. DeangelisM. DebeerH. DeboeckW. DeboerC. Declercq M. D. M.N. DegrootC. DelavaissiereB. DelottoA. DeminH. DijkstraL. DiciaccioF. DiamaJ. DolbeauM. DonszelmannK. DorobaM. DracosJ. DreesM. DrisY. DufourL. O. Eek P. A. M.R. EhretT. EkelofG. EkspongA. E. PeisertJ. P. EngelD. FassouliotisM. FeindtM. F. AlonsoA. FerrerT. A. FilippasA. FirestoneH. FoethE. FokitisF. Fontanelli K. A. J.J. L. FoussetS. FranconB. FranekP. FrenkielD. C. FriesA. G. FrodesenR. FruhwirthF. FuldaquenzerK. FurnivalH. FurstenauJ. FusterG. GaleazziD. GambaC. GarciaJ. GarciaC. GasparU. GaspariniP. GavilletE. N. GazisJ. P. GerberP. GiacomelliR. GokieliB. GolobV. M. Goloyatyuk J. J. G.A. GoobarG. GopalM. GorskiV. GraccoA. GrantF. GrardE. GrazianiG. GrosdidierE. GrossP. GrossewiesmannB. GrosseteteS. GumenyukJ. GuyU. HaedingerF. HahnM. HahnS. HaiderZ. HajdukA. HakanssonA. HallgrenK. HamacherG. H. DemonchenaultZ. HajdukA. HakanssonA. HallgrenK. HamacherG. H. DemonchenaultW. HaoF. J. HarrisT. 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. HrubecC. HuetP. O. HulthK. HultqvistP. IoannouD. IsenhowerP. S. IversenJ. N. JacksonP. JalochaG. JarlskogP. JarryB. JeanmarieE. K. JohanssonD. JohnsonM. JonkerL. JonssonP. JuillotG. KalkanisJ. KalkkinenG. KalmusF. KapustaM. KarlssonE. KarvelasS. KatsanevasE. C. KatsoufisR. KeranenJ. KestemanB. A. KhomenkoN. N. KhovanskiB. KingN. J. KjaerH. KleinW. KlemptA. KlovningP. KluitA. KochmehrinJ. H. KoehneB. KoeneP. KokkiniasM. KopfK. KorcylA. V. KorytovV. KostioukhineC. KourkoumelisO. KouznetsovP. H. KramerJ. KrolikowskiI. KronkvistU. KruenermarquisW. KucewiczK. KulkaK. KurvinenC. LacastaC. LambropoulosJ. W. LamsaL. LanceriV. LapinJ. P. LaugierR. LauhakangasG. LederF. LedroitR. LeitnerY. LemoigneJ. LemonneG. LenzenV. LepeltierT. LesiakJ. M. LevyE. LiebD. LikoJ. LindgrenR. LindnerA. LipniackaI. LippiB. LoerstadM. LokajicekJ. G. LokenA. Lopezfernandez M. A. L.M. LosD. LoukasJ. J. LozanoP. LutzL. LyonsG. MaehlumJ. MaillardA. MaltezosF. MandlJ. MarcoM. MargoniJ. C. MarinA. MarkouT. MaronS. MartiL. MathisF. MatorrasC. MatteuzziG. MatthiaeM. MazzucatoM. MccubbinR. MckayR. McnultyG. MeolaC. MeroniW. T. MeyerM. MichelottoI. MikulecL. MirabitoW. A. MitaroffG. V. MitselmakherU. MjoernmarkT. MoaR. MoellerK. MoenigM. R. MongeP. MorettiniH. MuellerW. J. MurrayG. MyattF. NaraghiF. L. NavarriaP. NegriB. S. NielsenB. NijjharV. Nikolaenko P. E. S.P. NissV. ObraztsovA. G. OlshevskiR. OravaA. OstankovK. OsterbergA. OuraouM. PaganoniR. PainH. PalkaT. D. PapadopoulouL. PapeA. PasseriM. PegoraroJ. PennanenV. PerevozchikovM. PernickaA. PerrottaC. PetridouA. PetroliniL. PetrovykhT. E. PettersenF. PierreM. PimentaO. PingotS. PlaszczynskiM. E. PolG. PolokP. PoropatP. PriviteraA. PulliaD. RadojicicS. RagazziH. RahmaniP. N. RatoffA. L. ReadN. G. RedaelliM. ReglerD. ReidP. B. RentonL. K. ResvanisF. RichardM. RichardsonJ. RidkyG. RinaudoI. RoditiAlessandra RomeroI. RoncaglioloP. RoncheseC. RonnqvistE. I. RosenbergS. RossiU. RossiE. RossoP. RoudeauT. RovelliW. RuckstuhlV. RuhlmannkleiderA. RuizH. SaarikkoY. SacquinG. SajotJ. SaltJ. SanchezM. SanninoS. SchaelH. SchneiderB. Schulze M. A. E.G. SciollaF. ScuriA. M. SegarR. SekulinM. SessaG. SetteR. SeufertR. C. ShellardI. SiccamaP. SiegristS. SimonettiF. SimonettoA. N. SisakianT. B. SkaaliG. SkjevlingG. SmadjaG. R. SmithR. SosnowskiT. S. SpassoffE. SpiritiS. SquarciaH. StaeckC. StanescuS. StapnesG. StavropoulosF. StichelbautA. StocchiJ. StraussJ. StraverR. StrubM. SzczekowskiM. SzeptyckaP. SzymanskiT. TabarelliS. TavernierO. TchikilevG. E. TheodosiouA. TilquinJ. TimmermansV. G. TimofeevI. G. TkatchevT. TodorovD. Z. ToetO. TokerE. TorassaL. TortoraD. TreilleU. TrevisanG. TristramC. TronconA. TsirouE. N. TsyganovM. L. TurluerT. TuuvaI. A. TyapkinM. TyndelS. TzamariasS. UeberschaerO. UllalandV. UvarovG. ValentiE. Vallazza J. A. V.C. VanderveldeG. W. VanapeldoornP. VandamM. VanderheijdenW. K. VandoninckP. VazG. VegniL. VenturaW. VenusF. VerbeureL. S. VertogradovD. VilanovaP. VincentL. VitaleE. VlasovA. S. VodopyanovM. VollmerG. VoulgarisM. VoutilainenV. VrbaH. WahlenC. WalckF. WaldnerM. WayneA. WehrM. WeierstallP. WeilhammerJ. WernerF. WaldnerJ. H. WickensJ. WikneG. R. Wilkinson W. S. C.M. WinterM. WitekD. WormaldG. WormserK. WoschnaggN. YamdagniP. YepesA. ZaitsevA. ZalewskaP. ZalewskiD. ZavrtanikE. ZevgolatakosG. ZhangN. I. ZiminM. ZitoR. ZuberiR. Z. FunchalG. ZumerleJ. Zuniga

subject

QuarkNuclear and High Energy PhysicsParticle physicsLUND MONTE-CARLO; HEAVY FLAVOR PRODUCTION; JET FRAGMENTATION; PHYSICS; BOSONHEAVY FLAVOR PRODUCTIONLUND MONTE-CARLOElectron–positron annihilationFlavourHadronMathematicsofComputing_GENERALComputer Science::Digital Libraries01 natural sciencesJET FRAGMENTATIONCharm quarkPHYSICS0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]010306 general physicsPhysicsArtificial neural network010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyTheoryofComputation_GENERALBOSONMathMLComputer Science::Mathematical SoftwareHigh Energy Physics::ExperimentFísica nuclearClassifier (UML)Particle Physics - Experiment

description

A classifier based on a feed-forward neural network has been used for separating a sample of about 123 500 selected hadronic decays of the Z 0 , collected by DELPHI during 1991, into three classes according to the flavour of the original quark pair: u u +d d +s s (unresolved), c c and b b . The classification has been used to compute the partial widths of the Z 0 into b and c quark pairs. This gave Γ c c /Γ h = 0.151 ± 0.008 ( stat. ) ± 0.041 ( syst. ) , Γ b b /Γ h = 0.232±0.005 ( stat. )±0.017 ( syst. ) .

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