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High Energy Physics - Phenomenology

arXiv:0802.1489 (hep-ph)
[Submitted on 11 Feb 2008 (v1), last revised 19 Nov 2008 (this version, v2)]

Title:Parameter Degeneracy in Flavor-Dependent Reconstruction of Supernova Neutrino Fluxes

Authors:H. Minakata, H. Nunokawa, R. Tomas, J. W. F. Valle
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Abstract: We reexamine the possibility of reconstructing the initial fluxes of supernova neutrinos emitted in a future core-collapse galactic supernova explosion and detected in a Megaton-sized water Cherenkov detector. A novel key element in our method is the inclusion, in addition to the total and the average energies of each neutrino species, of a "pinching" parameter characterizing the width of the distribution as a fit parameter. We uncover in this case a continuous degeneracy in the reconstructed parameters of supernova neutrino fluxes at the neutrinosphere. We analyze in detail the features of this degeneracy and show how it occurs irrespective of the parametrization used for the distribution function. Given that this degeneracy is real we briefly comment on possible steps towards resolving it, which necessarily requires going beyond the setting presented here.
Comments: 28 pages, 37 figures, version with some improvements in the text and some new references, conclusions unchanged, to appear in JCAP
Subjects: High Energy Physics - Phenomenology (hep-ph)
Report number: IFIC/08-09
Cite as: arXiv:0802.1489 [hep-ph]
  (or arXiv:0802.1489v2 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.0802.1489
Journal reference: JCAP 0812:006,2008
Related DOI: https://doi.org/10.1088/1475-7516/2008/12/006

Submission history

From: Ricard Tomas [view email]
[v1] Mon, 11 Feb 2008 17:59:54 UTC (483 KB)
[v2] Wed, 19 Nov 2008 14:40:59 UTC (495 KB)
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