uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Search for a diffuse flux of astrophysical muon neutrinos with the IceCube 59-string configuration
Show others and affiliations
2014 (English)In: Physical Review D, ISSN 1550-7998, Vol. 89, no 6, 062007- p.Article in journal (Refereed) Published
Abstract [en]

A search for high-energy neutrinos was performed using data collected by the IceCube Neutrino Observatory from May 2009 to May 2010, when the array was running in its 59-string configuration. The data sample was optimized to contain muon neutrino induced events with a background contamination of atmospheric muons of less than 1%. These data, which are dominated by atmospheric neutrinos, are analyzed with a global likelihood fit to search for possible contributions of prompt atmospheric and astrophysical neutrinos, neither of which have yet been identified. Such signals are expected to follow a harder energy spectrum than conventional atmospheric neutrinos. In addition, the zenith angle distribution differs for astrophysical and atmospheric signals. A global fit of the reconstructed energies and directions of observed events is performed, including possible neutrino flux contributions for an astrophysical signal and atmospheric backgrounds as well as systematic uncertainties of the experiment and theoretical predictions. The best fit yields an astrophysical signal flux for nu(mu) + (nu) over bar (mu) of E-2. Phi(E) = 0.25 x 10(-8) GeV cm(-2) s(-1) sr(-1), and a zero prompt component. Although the sensitivity of this analysis for astrophysical neutrinos surpasses the Waxman and Bahcall upper bound, the experimental limit at 90% confidence level is a factor of 1.5 above at a flux of E-2 . Phi(E) = 1.44 x 10(-8) GeV cm(-2) s(-1) sr(-1).

Place, publisher, year, edition, pages
2014. Vol. 89, no 6, 062007- p.
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-225095DOI: 10.1103/PhysRevD.89.062007ISI: 000334309000003OAI: oai:DiVA.org:uu-225095DiVA: diva2:719947
Available from: 2014-05-27 Created: 2014-05-27 Last updated: 2014-05-27Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Boersma, David J.Botner, OlgaHallgren, Allande los Heros, Carlos Perez
By organisation
High Energy Physics
In the same journal
Physical Review D
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 182 hits
ReferencesLink to record
Permanent link

Direct link