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

Direct link
Charm decay in slow-jet supernovae as the origin of the IceCube ultra-high energy neutrino events
University of Arizona.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics. (Theoretical high energy physics)ORCID iD: 0000-0003-0452-0671
University of Iowa.
University of Arizona.
2015 (English)In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, Vol. 6, 034Article in journal (Refereed) Published
Abstract [en]

We investigate whether the recent ultra-high energy (UHE) neutrino events detected at the IceCube neutrino observatory could come from the decay of charmed mesons produced within the mildly relativistic jets of supernova-like astrophysical sources. We demonstrate that the 5.7σ excess of neutrinos observed by IceCube in the energy range 30 TeV--2 PeV can be explained by a diffuse flux of neutrinos produced in such slow-jet supernovae, using the values of astrophysical and QCD parameters within the theoretical uncertainties associated with neutrino production from charmed meson decay in astrophysical sources. We discuss the theoretical uncertainties inherent in the evaluation of charm production in high energy hadronic collisions, as well as the astrophysical uncertainties associated with slow-jet supernova sources. The proton flux within the source, and therefore also the produced neutrino flux, is cut off at around a few PeV, when proton cooling processes become dominant over proton acceleration. This directly explains the sudden drop in event rates at energies above a few PeV. We incorporate the effect of energy dependence in the spectrum-weighted charm production cross-section and show that this has a very significant effect on the shape, magnitude and cut-off energies for the neutrino flux.

Place, publisher, year, edition, pages
2015. Vol. 6, 034
Keyword [en]
Ultrahigh energy neutrinos, IceCube, charm quarks, supernova
National Category
Subatomic Physics
Research subject
Physics with specialization in Elementary Particle Physics
URN: urn:nbn:se:uu:diva-229748DOI: 10.1088/1475-7516/2015/06/034ISI: 000359215400035OAI: oai:DiVA.org:uu-229748DiVA: diva2:737400
Swedish Research Council, 621-2011-5107
Available from: 2014-08-12 Created: 2014-08-12 Last updated: 2015-09-07Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textarXiv:1407.2985

Search in DiVA

By author/editor
Enberg, Rikard
By organisation
High Energy Physics
In the same journal
Journal of Cosmology and Astroparticle Physics
Subatomic Physics

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: 193 hits
ReferencesLink to record
Permanent link

Direct link