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Title: Astrophysical limitations to the identification of dark matter: Indirect neutrino signals vis-a-vis direct detection recoil rates

Abstract

A convincing identification of dark matter (DM) particles can probably be achieved only through a combined analysis of different detections strategies, which provides an effective way of removing degeneracies in the parameter space of DM models. In practice, however, this program is made complicated by the fact that different strategies depend on different physical quantities, or on the same quantities but in a different way, making the treatment of systematic errors rather tricky. We discuss here the uncertainties on the recoil rate in direct-detection experiments and on the muon rate induced by neutrinos from dark matter annihilations in the Sun, and we show that, contrarily to the local DM density or overall cross section scale, irreducible astrophysical uncertainties affect the two rates in a different fashion, therefore limiting our ability to reconstruct the parameters of the dark matter particles. By varying within their respective errors astrophysical parameters such as the escape velocity and the velocity dispersion of dark matter particles, we show that the uncertainty on the relative strength of the neutrino and direct-detection signal is as large as a factor of 2 for typical values of the parameters, but can be even larger in some circumstances.

Authors:
;  [1]
  1. Physics Department, Theory Group, CERN, CH-1211 Geneva 23, Switzerland and LAPTH, UMR 5108, 9 chemin de Bellevue - BP 110, 74941 Annecy-Le-Vieux (France)
Publication Date:
OSTI Identifier:
21421112
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 82; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevD.82.063505; (c) 2010 American Institute of Physics; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANNIHILATION; ASTROPHYSICS; CROSS SECTIONS; DENSITY; DISPERSIONS; MUONS; NEUTRINO DETECTION; NEUTRINOS; NONLUMINOUS MATTER; SPACE; SUN; VELOCITY; DETECTION; ELEMENTARY PARTICLES; FERMIONS; INTERACTIONS; LEPTONS; MAIN SEQUENCE STARS; MASSLESS PARTICLES; MATTER; PARTICLE INTERACTIONS; PHYSICAL PROPERTIES; PHYSICS; RADIATION DETECTION; STARS

Citation Formats

Serpico, Pasquale D, Bertone, Gianfranco, and Institut d'Astrophysique de Paris, France. UMR7095-CNRS UPMC, 98bis Boulevard Arago, 75014 Paris, France and Institute for Theoretical Physics, University of Zurich, 8057 Zurich. Astrophysical limitations to the identification of dark matter: Indirect neutrino signals vis-a-vis direct detection recoil rates. United States: N. p., 2010. Web. doi:10.1103/PHYSREVD.82.063505.
Serpico, Pasquale D, Bertone, Gianfranco, & Institut d'Astrophysique de Paris, France. UMR7095-CNRS UPMC, 98bis Boulevard Arago, 75014 Paris, France and Institute for Theoretical Physics, University of Zurich, 8057 Zurich. Astrophysical limitations to the identification of dark matter: Indirect neutrino signals vis-a-vis direct detection recoil rates. United States. doi:10.1103/PHYSREVD.82.063505.
Serpico, Pasquale D, Bertone, Gianfranco, and Institut d'Astrophysique de Paris, France. UMR7095-CNRS UPMC, 98bis Boulevard Arago, 75014 Paris, France and Institute for Theoretical Physics, University of Zurich, 8057 Zurich. Wed . "Astrophysical limitations to the identification of dark matter: Indirect neutrino signals vis-a-vis direct detection recoil rates". United States. doi:10.1103/PHYSREVD.82.063505.
@article{osti_21421112,
title = {Astrophysical limitations to the identification of dark matter: Indirect neutrino signals vis-a-vis direct detection recoil rates},
author = {Serpico, Pasquale D and Bertone, Gianfranco and Institut d'Astrophysique de Paris, France. UMR7095-CNRS UPMC, 98bis Boulevard Arago, 75014 Paris, France and Institute for Theoretical Physics, University of Zurich, 8057 Zurich},
abstractNote = {A convincing identification of dark matter (DM) particles can probably be achieved only through a combined analysis of different detections strategies, which provides an effective way of removing degeneracies in the parameter space of DM models. In practice, however, this program is made complicated by the fact that different strategies depend on different physical quantities, or on the same quantities but in a different way, making the treatment of systematic errors rather tricky. We discuss here the uncertainties on the recoil rate in direct-detection experiments and on the muon rate induced by neutrinos from dark matter annihilations in the Sun, and we show that, contrarily to the local DM density or overall cross section scale, irreducible astrophysical uncertainties affect the two rates in a different fashion, therefore limiting our ability to reconstruct the parameters of the dark matter particles. By varying within their respective errors astrophysical parameters such as the escape velocity and the velocity dispersion of dark matter particles, we show that the uncertainty on the relative strength of the neutrino and direct-detection signal is as large as a factor of 2 for typical values of the parameters, but can be even larger in some circumstances.},
doi = {10.1103/PHYSREVD.82.063505},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 6,
volume = 82,
place = {United States},
year = {2010},
month = {9}
}