6533b835fe1ef96bd129f6e4
RESEARCH PRODUCT
Evidence for Astrophysical Muon Neutrinos from the Northern Sky with IceCube
Icecube CollaborationM. G. AartsenK. AbrahamM. AckermannJ. AdamsJ. A. AguilarM. AhlersM. AhrensD. AltmannT. AndersonM. ArchingerC. ArguellesT. C. ArlenJ. AuffenbergX. BaiS. W. BarwickV. BaumR. BayJ. J. BeattyJ. Becker TjusK. -H. BeckerE. BeiserS. BenzviP. BerghausD. BerleyE. BernardiniA. BernhardD. Z. BessonG. BinderD. BindigM. BissokE. BlaufussJ. BlumenthalD. J. BoersmaC. BohmM. BörnerF. BosD. BoseS. BöserO. BotnerJ. BraunL. BrayeurH. -P. BretzA. M. BrownN. BuzinskyJ. CaseyM. CasierE. CheungD. ChirkinA. ChristovB. ChristyK. ClarkL. ClassenS. CoendersD. F. CowenA. H. Cruz SilvaJ. DaughheteeJ. C. DavisM. DayJ. P. A. M. De AndréC. De ClercqH. DembinskiS. De RidderP. DesiatiK. D. De VriesG. De WasseigeM. De WithT. DeyoungJ. C. Díaz-vélezJ. P. DummM. DunkmanR. EaganB. EberhardtT. EhrhardtB. EichmannS. EulerP. A. EvensonO. FadiranS. FaheyA. R. FazelyA. FedynitchJ. FeintzeigJ. FeldeK. FilimonovC. FinleyT. Fischer-waselsS. FlisT. FuchsT. K. GaisserR. GaiorJ. GallagherL. GerhardtK. GhorbaniD. GierL. GladstoneM. GlaglaT. GlüsenkampA. GoldschmidtG. GolupJ. G. GonzalezJ. A. GoodmanD. GóraD. GrantP. GretskovJ. C. GrohA. GroßC. HaC. HaackA. Haj IsmailA. HallgrenF. HalzenB. HansmannK. HansonD. HebeckerD. HeeremanK. HelbingR. HellauerD. HellwigS. HickfordJ. HignightG. C. HillK. D. HoffmanR. HoffmannK. HolzapfelA. HomeierK. HoshinaF. HuangM. HuberW. HuelsnitzP. O. HulthK. HultqvistS. InA. IshiharaE. JacobiG. S. JaparidzeK. JeroM. JurkovicB. KaminskyA. KappesT. KargA. KarleM. KauerA. KeivaniJ. L. KelleyJ. KempA. KheirandishJ. KirylukJ. KläsS. R. KleinG. KohnenH. KolanoskiR. KonietzA. KoobL. KöpkeC. KopperS. KopperD. J. KoskinenM. KowalskiK. KringsG. KrollM. KrollJ. KunnenN. KurahashiT. KuwabaraM. LabareJ. L. LanfranchiM. J. LarsonM. Lesiak-bzdakM. LeuermannJ. LeunerJ. LünemannJ. MadsenG. MaggiK. B. M. MahnR. MaruyamaK. MaseH. S. MatisR. MaunuF. McnallyK. MeagherM. MediciA. MeliT. MenneG. MerinoT. MeuresS. MiareckiE. MiddellE. MiddlemasJ. MillerL. MohrmannT. MontaruliR. MorseR. NahnhauerU. NaumannH. NiederhausenS. C. NowickiD. R. NygrenA. ObertackeA. OlivasA. OmairatA. O'murchadhaT. PalczewskiL. PaulJ. A. PepperC. Pérez De Los HerosC. PfendnerD. PielothE. PinatJ. PosseltP. B. PriceG. T. PrzybylskiJ. PützM. QuinnanL. RädelM. RameezK. RawlinsP. RedlR. ReimannM. RelichE. ResconiW. RhodeM. RichmanS. RichterB. RiedelS. RobertsonM. RongenC. RottT. RuheB. RuzybayevD. RyckboschS. M. SabaL. SabbatiniH. -G. SanderA. SandrockJ. SandroosS. SarkarK. SchattoF. ScheriauM. SchimpT. SchmidtM. SchmitzS. SchoenenS. SchönebergA. SchönwaldA. SchukraftL. SchulteD. SeckelS. SeunarineR. ShanidzeM. W. E. SmithD. SoldinG. M. SpiczakC. SpieringM. StahlbergM. StamatikosT. StanevN. A. StanishaA. StasikT. StezelbergerR. G. StokstadA. StößlE. A. StrahlerR. StrömN. L. StrotjohannG. W. SullivanM. SutherlandH. TaavolaI. TaboadaS. Ter-antonyanA. TerliukG. TešićS. TilavP. A. ToaleM. N. TobinD. TosiM. TselengidouE. UngerM. UsnerS. VallecorsaJ. VandenbrouckeN. Van EijndhovenS. VanheuleJ. Van SantenJ. VeenkampM. VehringM. VogeM. VraegheC. WalckM. WallraffN. WandkowskyC. WeaverC. WendtS. WesterhoffB. J. WhelanN. WhitehornC. WicharyK. WiebeC. H. WiebuschL. WilleD. R. WilliamsH. WissingM. WolfT. R. WoodK. WoschnaggD. L. XuX. W. XuY. XuJ. P. YanezG. YodhS. YoshidaP. ZarzhitskyM. Zollsubject
HIGH-ENERGY NEUTRINOSFLUXESATMOSPHERIC MUONAstrophysics::High Energy Astrophysical PhenomenaSolar neutrinoFOS: Physical sciencesGeneral Physics and AstronomyAstrophysics01 natural sciencesIceCube Neutrino ObservatoryRATIO0103 physical sciencesddc:550010303 astronomy & astrophysicsGAMMA-RAY BURSTSHigh Energy Astrophysical Phenomena (astro-ph.HE)PhysicsSPECTRUMSpectral indexMuon010308 nuclear & particles physicsSolar neutrino problemPhysics and AstronomyNeutrino detector13. Climate actionHigh Energy Physics::ExperimentNeutrinoNeutrino astronomyAstrophysics - High Energy Astrophysical Phenomenadescription
Results from the IceCube Neutrino Observatory have recently provided compelling evidence for the existence of a high energy astrophysical neutrino flux utilizing a dominantly Southern Hemisphere dataset consisting primarily of nu_e and nu_tau charged current and neutral current (cascade) neutrino interactions. In the analysis presented here, a data sample of approximately 35,000 muon neutrinos from the Northern sky was extracted from data taken during 659.5 days of livetime recorded between May 2010 and May 2012. While this sample is composed primarily of neutrinos produced by cosmic ray interactions in the Earth's atmosphere, the highest energy events are inconsistent with a hypothesis of solely terrestrial origin at 3.7 sigma significance. These neutrinos can, however, be explained by an astrophysical flux per neutrino flavor at a level of Phi(E_nu) = 9.9^{+3.9}_{-3.4} times 10^{-19} GeV^{-1} cm^{-2} sr^{-1} s^{-1} ({E_nu / 100 TeV})^{-2}, consistent with IceCube's Southern Hemisphere dominated result. Additionally, a fit for an astrophysical flux with an arbitrary spectral index was performed. We find a spectral index of 2.2^{+0.2}_{-0.2}, which is also in good agreement with the Southern Hemisphere result.
year | journal | country | edition | language |
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2015-08-20 |