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2012

Gamma ray constraints on Decaying Dark Matter

Cirelli, Marco, Moulin, Emmanuel, Panci, Paolo et al.

Understand

We derive new bounds on decaying Dark Matter from the gamma ray measurements of (i) the isotropic residual (extragalactic) background by Fermi and (ii) the Fornax galaxy cluster by HESS.

We find that those from (i) are among the most stringent constraints currently available, for a large range of DM masses and a variety of decay modes, excluding half-lives up to ~10^26 to few 10^27 seconds.
In particular, they rule out the interpretation in terms of decaying DM of the e^\pm spectral features in Pamela, Fermi and HESS, unless very conservative choices are adopted.
We also discuss future prospects for CTA bounds from Fornax which, contrary to the present HESS constraints of (ii), may allow for an interesting improvement and may become better than those from the current or future extragalactic Fermi data.

Built on

A. Pinzke, C. Pfrommer and L. Bergstrom, Phys. Rev. Lett
Original
1948
Earlier work this paper cites.
D. Eichler, Phys. Rev. Lett
1989
Earlier work this paper cites.
J. F. Navarro, C. S. Frenk and S. D. M. White, Astrophys. J
1996
Earlier work this paper cites.
I. V. Moskalenko and A. W. Strong, Astrophys. J
1998
Earlier work this paper cites.
E. A. Baltz and J. Edsjo, Phys. Rev. D
1998
Earlier work this paper cites.
F. Takayama and M. Yamaguchi, Phys. Lett. B
2000
Earlier work this paper cites.
T. H. Reiprich and H. Boehringer, Astrophys. J
2002
Earlier work this paper cites.
K. Ichiki, P. M. Garnavich, T. Kajino, G. J. Mathews, M. Yahiro, Phys. Rev
2004
Earlier work this paper cites.
J. M. Overduin and P. S. Wesson, Phys. Rept
2004
Earlier work this paper cites.
A. Burkert, IAU Symp
2004
Earlier work this paper cites.
G. M. Voit, Rev. Mod. Phys
2005
Earlier work this paper cites.
W. A. Rolke, A. M. Lopez and J. Conrad, Nucl. Instrum. Meth. A
2005
Earlier work this paper cites.
W. Buchmuller, L. Covi, K. Hamaguchi, A. Ibarra and T. Yanagida, JHEP
2007
Earlier work this paper cites.
G. Bertone, W. Buchmuller, L. Covi and A. Ibarra, JCAP
Original
2007
Earlier work this paper cites.
P. Blasi, S. Gabici and G. Brunetti, Int. J. Mod. Phys. A
2007
Earlier work this paper cites.
D. A. Buote, F. Gastaldello, P. J. Humphrey, L. Zappacosta, J. S. Bullock, F. Brighenti and W. G. Mathews, Astrophys. J
2007
Earlier work this paper cites.
In M. Kachelriess and P. D. Serpico, Phys. Rev. D
Original
2008
Earlier work this paper cites.
F. Aharonian
Original
2008
Earlier work this paper cites.