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25 April 2024

» arxiv » 1104.5187

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A Search for a Diffuse Flux of Astrophysical Muon Neutrinos with the IceCube 40-String Detector
IceCube Collaboration ; R. Abbasi ; Y. Abdou ; T. Abu-Zayyad ; J. Adams ; J. A. Aguilar ; M. Ahlers ; K. Andeen ; J. Auffenberg ; X. Bai ; M. Baker ; S. W. Barwick ; R. Bay ; J. L. Bazo Alba ; K. Beattie ; J. J. Beatty ; S. Bechet ; J. K. Becker ; K.-H. Becker ; M. L. Benabderrahmane ; S. BenZvi ; J. Berdermann ; P. Berghaus ; D. Berley ; E. Bernardini ; D. Bertrand ; D. Z. Besson ; D. Bindig ; M. Bissok ; E. Blaufuss ; J. Blumenthal ; D. J. Boersma ; C. Bohm ; D. Bose ; S. Böser ; O. Botner ; J. Braun ; A. M. Brown ; S. Buitink ; M. Carson ; D. Chirkin ; B. Christy ; J. Clem ; F. Clevermann ; S. Cohen ; C. Colnard ; D. F. Cowen ; M. V. D'Agostino ; M. Danninger ; J. Daughhetee ; J. C. Davis ; C. De Clercq ; L. Demirörs ; T. Denger ; O. Depaepe ; F. Descamps ; P. Desiati ; G. de Vries-Uiterweerd ; T. DeYoung ; J. C. Díaz-Vélez ; M. Dierckxsens ; J. Dreyer ; J. P. Dumm ; R. Ehrlich ; J. Eisch ; R. W. Ellsworth ; O. Engdegård ; S. Euler ; P. A. Evenson ; O. Fadiran ; A. R. Fazely ; A. Fedynitch ; T. Feusels ; K. Filimonov ; C. Finley ; T. Fischer-Wasels ; M. M. Foerster ; B. D. Fox ; A. Franckowiak ; R. Franke ; T. K. Gaisser ; J. Gallagher ; M. Geisler ; L. Gerhardt ; L. Gladstone ; T. Glüsenkamp ; A. Goldschmidt ; J. A. Goodman ; D. Gora ; D. Grant ; T. Griesel ; A. Groß ; S. Grullon ; M. Gurtner ; C. Ha ; A. Hallgren ; F. Halzen ; K. Han ; K. Hanson ; D. Heinen ; K. Helbing ; P. Herquet ; S. Hickford ; G. C. Hill ; K. D. Hoffman ; A. Homeier ; K. Hoshina ; D. Hubert ; W. Huelsnitz ; J.-P. Hülß ; P. O. Hulth ; K. Hultqvist ; S. Hussain ; A. Ishihara ; J. Jacobsen ; G. S. Japaridze ; H. Johansson ; J. M. Joseph ; K.-H. Kampert ; A. Kappes ; T. Karg ; A. Karle ; J. L. Kelley ; P. Kenny ; J. Kiryluk ; F. Kislat ; S. R. Klein ; J.-H. Köhne ; G. Kohnen ; H. Kolanoski ; L. Köpke ; S. Kopper ; D. J. Koskinen ; M. Kowalski ; T. Kowarik ; M. Krasberg ; T. Krings ; G. Kroll ; T. Kuwabara ; M. Labare ; S. Lafebre ; K. Laihem ; H. Landsman ; M. J. Larson ; R. Lauer ; J. Lünemann ; J. Madsen ; P. Majumdar ; A. Marotta ; R. Maruyama ; K. Mase ; H. S. Matis ; K. Meagher ; M. Merck ; P. Mészáros ; T. Meures ; E. Middell ; N. Milke ; J. Miller ; T. Montaruli ; R. Morse ; S. M. Movit ; R. Nahnhauer ; J. W. Nam ; U. Naumann ; P. Nießen ; D. R. Nygren ; S. Odrowski ; A. Olivas ; M. Olivo ; A. O'Murchadha ; M. Ono ; S. Panknin ; L. Paul ; C. Pérez de los Heros ; J. Petrovic ; A. Piegsa ; D. Pieloth ; R. Porrata ; J. Posselt ; P. B. Price ; G. T. Przybylski ; K. Rawlins ; P. Redl ; E. Resconi ; W. Rhode ; M. Ribordy ; A. Rizzo ; J. P. Rodrigues ; P. Roth ; F. Rothmaier ; C. Rott ; T. Ruhe ; D. Rutledge ; B. Ruzybayev ; D. Ryckbosch ; H.-G. Sander ; M. Santander ; S. Sarkar ; K. Schatto ; T. Schmidt ; A. Schönwald ; A. Schukraft ; A. Schultes ; O. Schulz ; M. Schunck ; D. Seckel ; B. Semburg ; S. H. Seo ; Y. Sestayo ; S. Seunarine ; A. Silvestri ; A. Slipak ; G. M. Spiczak ; C. Spiering ; M. Stamatikos ; T. Stanev ; G. Stephens ; T. Stezelberger ; R. G. Stokstad ; A. Stössl ; S. Stoyanov ; E. A. Strahler ; T. Straszheim ; M. Stür ; G. W. Sullivan ; Q. Swillens ; H. Taavola ; I. Taboada ; A. Tamburro ; A. Tepe ; S. Ter-Antonyan ; S. Tilav ; P. A. Toale ; S. Toscano ; D. Tosi ; D. Turčan ; N. van Eijndhoven ; J. Vandenbroucke ; A. Van Overloop ; J. van Santen ; M. Vehring ; M. Voge ; C. Walck ; T. Waldenmaier ; M. Wallraff ; M. Walter ; Ch. Weaver ; C. Wendt ; S. Westerhoff ; N. Whitehorn ; K. Wiebe ; C. H. Wiebusch ; D. R. Williams ; R. Wischnewski ; H. Wissing ; M. Wolf ; T. R. Wood ; K. Woschnagg ; C. Xu ; X. W. Xu ; G. Yodh ; S. Yoshida ; P. Zarzhitsky ;
Date:	27 Apr 2011
Abstract:	The IceCube Neutrino Observatory is a 1 km$^{3}$ detector currently taking data at the South Pole. One of the main strategies used to look for astrophysical neutrinos with IceCube is the search for a diffuse flux of high-energy neutrinos from unresolved sources. If there are many weak or moderate sources of extraterrestrial neutrinos, their output will appear as an diffuse flux. A hard energy spectrum of neutrinos from isotropically distributed astrophysical sources could manifest themselves as a detectable signal that may be differentiated from the atmospheric neutrino background by spectral measurement. Since astrophysical neutrinos are expected to have a harder energy spectrum than atmospheric neutrinos, a reliable method of estimating the energy of the neutrino-induced lepton is crucial. This analysis uses data from the IceCube detector collected in its half completed configuration which operated between April 2008 and May 2009 to search for a diffuse flux of astrophysical muon neutrinos. A total of 12,877 upward going candidate neutrino events have been selected for this analysis. No evidence for a diffuse flux of astrophysical muon neutrinos was found in the data set leading to a result of a 90 percent C.L. upper limit on the normalization of an $E^{-2}$ astrophysical $ u_{mu}$ flux of $8.9 imes 10^{-9} mathrm{GeV cm^{-2} s^{-1} sr^{-1}}$. The analysis is sensitive in the energy range between $35 mathrm{TeV} - 7 mathrm{PeV}$. The 12,877 candidate neutrino events are consistent with atmospheric muon neutrinos measured from 332 GeV to 84 TeV and no evidence for a prompt component to the atmospheric neutrino spectrum is found.
Source:	arXiv, 1104.5187
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