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Open AccessJournal ArticleDOI

Multiyear search for a diffuse flux of muon neutrinos with AMANDA-II

A. Achterberg, +238 more
- 09 May 2007 - 
- Vol. 76, Iss: 4, pp 042008
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TLDR
In this article, an upper bound of E-2 Phi(90%C.L.) < 7.4x10(-8) GeV cm(-2) s(-1) sr(-1).
Abstract
A search for TeV-PeV muon neutrinos from unresolved sources was performed on AMANDA-II data collected between 2000 and 2003 with an equivalent live time of 807 days. This diffuse analysis sought to find an extraterrestrial neutrino flux from sources with nonthermal components. The signal is expected to have a harder spectrum than the atmospheric muon and neutrino backgrounds. Since no excess of events was seen in the data over the expected background, an upper limit of E-2 Phi(90%C.L.)< 7.4x10(-8) GeV cm(-2) s(-1) sr(-1) is placed on the diffuse flux of muon neutrinos with a Phi proportional to E-2 spectrum in the energy range 16 TeV to 2.5 PeV. This is currently the most sensitive Phi proportional to E-2 diffuse astrophysical neutrino limit. We also set upper limits for astrophysical and prompt neutrino models, all of which have spectra different from Phi proportional to E-2.

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Journal ArticleDOI

Extragalactic optical-infrared background radiation, its time evolution and the cosmic photon-photon opacity

TL;DR: In this article, the authors have modelled the extragalactic optical and infrared backgounds using available information on cosmic sources in the universe from far-UV to sub-millimeter wavelengths over a wide range of cosmic epochs, and applied their photon-photon opacity estimates to the analysis of spectral data at TeV energies on a few BLAZARs of particular interest.
Journal ArticleDOI

A combined maximum-likelihood analysis of the high-energy astrophysical neutrino flux measured with icecube

M. G. Aartsen, +319 more
TL;DR: In this article, the results from six different IceCube searches for astrophysical neutrinos in a maximum-likelihood analysis are combined, and the combined event sample features high-statistics samples of shower-like and track-like events.
Journal ArticleDOI

High-energy neutrinos in the context of multimessenger astrophysics

TL;DR: In this article, a review of high-energy neutrinos (E ν > 100 GeV ) with the main topics as follows are: • The production mechanism of high energy neutrino in astrophysical shocks.
Journal ArticleDOI

High-energy neutrinos in the context of multimessenger physics

Julia Becker
- 08 Oct 2007 - 
TL;DR: In this paper, a review of high-energy neutrinos (E>100 GeV) with the main topics as follows are discussed: the connection between the observed photon spectra and charged cosmic rays is described and the source properties as they are known from photon observations and from charged Cosmic Rays are presented.
Journal ArticleDOI

GZK neutrinos after the Fermi-LAT diffuse photon flux measurement

TL;DR: In this paper, the authors investigated the effect of the crossover energy on the prediction of the cosmogenic neutrino flux in all-proton models with respect to the HiRes and Fermi-LAT measurements of the diffuse extragalactic γ-ray background.
References
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Book

High Energy Astrophysics

TL;DR: In this article, the authors introduce high energy astrophysics in the context of galaxies and the origin of cosmic rays in our galaxy, as well as the acceleration of high energy particles in magnetic fields.
Book

Cosmic rays and particle physics

TL;DR: In this paper, the authors present a model for accelerating a particle to >100 TeV using cosmic rays and neutrino-induced muons, which they call cosmic ray showers.

The icecube collaboration: contributions to the 29th international cosmic ray conference (icrc 2005), pune, india, aug. 2005

A. Achterberg, +199 more
TL;DR: The IceCube Collaboration: Contributions to the 29th International Cosmic Ray Conference (ICRC 2005), Pune, India, Aug. 2005 as discussed by the authors, contributed to the ICRC 2005.

LHC: the guide

C Lefevre
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