6533b836fe1ef96bd12a0afc
RESEARCH PRODUCT
Search for the dark photon in π0 decays
Enrico CeleghiniC. DamianiH. D. WahlA. A. MaierP. MarouelliM. FidecaroE. ImbergamoU. MoosbruggerA. DabrowskiB. PeyaudM. C. PetrucciW. BaldiniE. MonnierG. BocquetV. FalaleevM. PicciniN. DobleN. A. MolokanovaK. EppardCristina LazzeroniD. CowardI. MannelliL. GatignonM. MarkytanS. VendittiD.j. MundayNicolo CartigliaP. L. FrabettiV. KekelidzeM. ScarpaGiuseppe RuggieroM. ShiehS. A. WottonG. PierazziniS. StoynevMilene CalvettiA. NortonM. SzleperF. MarchettoA. MichettiA. CeccucciM. PepeG. MarelP. HristovM. VeltriEvelina GersabeckA. Cotta RamusinoMaulik R. PatelM. De BeerEvgueni GoudzovskiS. Goy LopezRoland WinstonJ.b. ChezeH. DibonW. KubischtaA. GonidecA. WinhartT. Fonseca MartinM. HolderG. CollazuolLuca FioriniF. CostantiniKonrad KleinknechtAndrea BizzetiR. FantechiP. F. DalpiazM. LentiM. Valdata-nappiP. CenciLeander LitovMauro RaggiM. ZiolkowskiG. LamannaS. BalevM. MartiniJ. DerreAlan W. WalkerRoberta ArcidiaconoMarco ClemencicE. IacopiniE. C. SwallowI. PolenkevichM. D. WoodL. WidhalmM. BehlerSimone BifaniMassimiliano FioriniM.w. SlaterA. PetersA. ZinchenkoCristina BiinoIvan MikulecR. WankeJ. R. BatleyNicola CabibboC. CheshkovV. KozhuharovM. SozziM. SavrieL. DilellaB. Bloch-devauxG.e. KalmusA. NappiA. GianoliB. VallageM. WacheC. CerriB. RenkYu. PotrebenikovD. MadigozhinP. RubinManfred JeitlerS. GiudiciG. AnzivinoE. MazzucatoL. MasettiF. PetrucciC. Morales MoralesMayda VelascoG. NeuhoferD.c. Cundysubject
Nuclear and High Energy PhysicsDark matterKAON DECAYSSocio-culturaleAstronomy & Astrophysics01 natural sciencesDark photondark matterHigh Energy Physics - ExperimentPhysics Particles & FieldsNuclear physics0202 Atomic Molecular Nuclear Particle And Plasma Physics0103 physical sciencesdark matter meson decays010306 general physicsDETECTORPhysicsNuclear and High Energy Physics dark photon photon pion neutral pionneutral pionRange (particle radiation)Large Hadron ColliderScience & Technology010308 nuclear & particles physicsPhysicsphotonDark Photon; KAON DECAYSpionmeson decaysNuclear & Particles Physicslcsh:QC1-999Physics NuclearPhysical Sciencesdark photonFotoneHigh Energy Physics::ExperimentParticle Physics - Experimentlcsh:PhysicsHigh Energy Physics - Experiment; Dark Photondescription
A sample of $1.69\times 10^7$ fully reconstructed $\pi^0\to\gamma e^+e^-$ decay candidates collected by the NA48/2 experiment at CERN in 2003--2004 is analysed to search for the dark photon ($A'$) production in the $\pi^0\to\gamma A'$ decay followed by the prompt $A'\to e^+e^-$ decay. No signal is observed, and an exclusion region in the plane of the dark photon mass $m_{A'}$ and mixing parameter $\varepsilon^2$ is established. The obtained upper limits on $\varepsilon^2$ are more stringent than the previous limits in the mass range $9~{\rm MeV}/c^2<m_{A'}<70~{\rm MeV}/c^2$. The NA48/2 sensitivity to the dark photon production in the $K^\pm\to\pi^\pm A'$ decay is also evaluated.
year | journal | country | edition | language |
---|---|---|---|---|
2015-04-02 |