6533b850fe1ef96bd12a8627

RESEARCH PRODUCT

Inclusive production of neutral pions in hadronic Z decays

A. RanieriH. HuD. SchlatterA. RougéP. ColasC. GewenigerJ-c. BrientS. SchaelG. SanguinettiM. MartinezRamon MiquelG. BujosaRm TurnbullR DellamarinaZiad AjaltouniG. FeliciPhilippe RosnetGp MurtasJ. ReeveI.j. ScottLei ZhangS. J. ChenA. PascualM-n MinardB. RenkO. CallotH. SeywerdRoberto Dell'orsoStefan SimionAlain FalvardJ.y. NiefManuel DelfinoE. SimopoulouDavid CalvetM. SchmellingM. SchmellingR. HagelbergP. HenrardOlivier LeroyBotterillG. LütjensImma RiuG. CaponKevin M. SmithGuido TonelliGuido TonelliF. StephanAw HalleyPaul HankeAo BrightthomasX. HuangJ. SommerJ. BoucrotPablo Rodriguez PerezF. BossiJ. KnoblochG. MannocchiLucia SilvestrisU. BeckerD. DecampJm ScarrP. SaraivaA. PutzerDm BinnieAnna ColaleoJ.d. HansenG. R. BonneaudPaolo LaurelliD. RousseauA. JacholkowskaC. N. BoothR. XuA. RoussarieP. GhezAlessia TricomiJa StrongTing WangF LediberderMaria GironeS. WasserbaechS. WernerJ-f GrivazE-e KlugeQ. OuyangW. KozaneckiGiovanna SelvaggiJf PusztaszeriBs NilssonAm StaceyD.p.s. FergusonO. SchneiderC. BozziFranco LigabueHj ParkJ. JoussetMichael SchmittYoung-il ChoiF. PodlyskiD. BuskulicS. EmeryChristian ZeitnitzCristinel DiaconuYb PanPh. HeusseT. R. EdgecockF. CombleyE. FernandezEric LanconAm LutzP. GirtlerB. MichelGa BlairM. ApollonioMg GreenKellyA. SciabàA. JusteJc ThompsonD. KuhnGunter QuastL. BosisioPatrick JanotA. GallaPeter ElmerIc ParkDe JaffeA. VayakiS. BettariniGiuseppe ZitoMarco CattaneoI. VideauJ. SchwindlingMc LemaireJ.h. DannB. Bloch-devauxF. RuggieriEttore FocardiEttore FocardiJm CrespoJohn RanderGy. WolfWm NewtonPr NortonM. ThulasidasE. RohneG. A. CowanCiulliJk SedgbeerG. MusolinoMa GiorgiC. MarkouJoseph RothbergJb HansenS. BrandtH. DrevermannR. SettlesP. PerretXin WuO'sheaM DepalmaF. ThomsonA. HockerT. J. SloanJ-j. AubertC. RaineA. ValassiF. EtienneFrancesco RagusaFrancesco RagusaRoberto TenchiniGeorg ZobernigS. MonteilJ. P. LeesChiarellaW. MännerAm LitkeC. GoyGerardo GanisA. BarresI. NikolicG. LutzB. RenschF. SanchezC. HoffmannKarl JakobsB. PietrzykHubert KrohaF. CeruttiI. GiehlJg LynchPs MarrocchesiS.n. BlackA.e. WrightYang GaoG. GraefeC. GeorgiopoulosA. BlondelW. ZhaoG. BolognaM. DavierL. F. ThompsonM. RumpfK. ZachariadouR. BeuselinckG. B. TaylorP. TempestaClaus GrupenM. Pepe-altarelliHeppJ-c. MontretM. VerderiA. TrabelsiMi WilliamsR. BarateA. BöhrerC. GuicheneyCaj BrewHg MoserH. WachsmuthJ. J. WalshJm YamartinoJ. CarrMa McneilR. BerlichMi ParsonsT. MedcalfM. AleppoH SchuneF. RanjardJ. SteinbergerF. DydakF. DydakPj DornanC. VanniniJie ZhangTc GreeningEmmerich KneringerW. CameronWilliamsG. CalderiniG. GianniniM. LethoAristotelis KyriakisHansenC. PadillaY. SaadiJordan NashP. MatoG. LuttersT. FearnleyH. VideauAs ThompsonG. HansperJa PerlasW. OrejudosEb MartinA. MoutoussiDonato CreanzaL. MonetaM. JacquetJohn T HarveyWerner WiedenmannJ. LefrançoisM. CarpinelliA. GregorioS. GonzalezA. LusianiK. TittelKonrad KleinknechtS. XueAlessandro GiassiStephen HaywoodA. WäänänenPaolo AzzurriD. CasperH. DietlA. Rosado-schlosserGünther DissertoriMario MaggiHg SanderMossadek TalbyGiuseppe RasoR. BoswellL. CurtisP. ComasF. FosterG. RudolphC. BenchoukG. MaggiAlain BonissentM. Fernandez-bosmanBuscherS. L. CartwrightS. OrteuJm RossignolA. SadoukiS. L. WuA. PachecoJt ChambersI. FerranteT. OestZ. Y. FengZ. Y. FengSalvatore NuzzoG. BatignaniL. SmolikM. ZhengP. CoyleB. VallageJ. Minguet-rodriguezDirk ZerwasR. AlemanyArnaud LucotteDw KimNancy MarinelliK. TrabelsiP. ColrainF. RiveraRp JohnsonG. HughesW. TejessyL. RolandiJm NachtmanG. GelaoJiali LinM.g. SchmidtJoseph ProriolF. TeubertN KontantinidisC. GotzheinC. BoyerM. WunschA. MintenL. M. MirG. RizzoA. J. FinchI. SiotisLorenzo FoàLorenzo FoàP. MaleyG. CrawfordP. H. HansenGiuseppe IaselliMaria Agnese CiocciL. GarridoL. GarridoR. FantechiP. Teixeira-diasAo BazarkoL. PassalacquaP. RensingDominique PallinB. JostPa McnamaraJf RenardyCk BowderyAlberto MessineoEvelyn ThomsonY. S. GaoY. S. GaoR StdenisA. WagnerH.y. KimW. BlumJh VonwimmerspergtoellerPhilippe OdierPierluigi CampanaPg VerdiniF. MurtasAm GreeneF. FortiRobert RichterB. GobboDuccio AbbaneoElizabeth LocciD. J. CandlinIg KnowlesFabrizio PallaOj HayesHasko StenzelG. ParriniSj DorrisRw FortyP. PayreL. DuflotPaolo SpagnoloLm BryantA. CordierAp BetteridgeI. LehrausJj VeilletMarkus FrankM. CordenJp SchullerA. AntonelliP VangemmerenAndrea VenturiMp CasadoG. BencivenniJ. GrahlYuehong XieP. PerrodoGiuseppe BagliesiArmstrongM. ChmeissaniGeorgios DaskalakisRw ClifftIr TomalinP. Bourdon

subject

PhysicsParticle physicsRange (particle radiation)Photon[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex]Physics and Astronomy (miscellaneous)Meson010308 nuclear & particles physicsPhysicsElectron–positron annihilationMonte Carlo methodHadron01 natural sciencesNuclear physicsMomentumPion0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]High Energy Physics::ExperimentNuclear Experiment010306 general physicsParticle Physics - Experiment

description

A measurement of the inclusive production of pi(0) mesons in hadronic Z decays is presented and compared to Monte Carlo model predictions. The analysis is based on approximately 2 million hadronic events recorded with the ALEPH detector at LEP at a centre-of-mass energy of root s = 91.2 GeV. Neutral pions are reconstructed using photons measured in the electromagnetic calorimeter and photons from conversion pairs. The inclusive pi(0) momentum spectrum is measured in the range 0.025 < x(p) = p/p(beam) < 1. In this range the number of pi(0) per hadronic Z is found to be 4.80 +/- 0.07(stat) +/- 0.31(sys). The differential inclusive pi(0) cross section is also measured as a function of transverse momentum with respect to the event plane (p(T)(in) and p(T)(out)). RI ANTONELLI, ANTONELLA/C-6238-2011; Passalacqua, Luca/F-5127-2011; Murtas, Fabrizio/B-5729-2012; St.Denis, Richard/C-8997-2012; Forti, Francesco/H-3035-2011; Ferrante, Isidoro/F-1017-2012

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