http://arxiv.org/abs/1910.11867
We derive the maximum fraction of energy emitted in the form of massive (Kaluza- Klein) gravitons by core collapse supernovae, and the corresponding minimal extra-dimensional Planck mass M* in the ADD gravity framework at TeV scales. Our constraints arise: a) from the extragalactic gamma ray background observed by Fermi-LAT after astrophysical sources have been removed, and b) via the residual galactic emission left after astrophysical and potentially dark matter emission have been removed. We focus on a number of extra dimensions 3 and 4, since M* is then in the TeV range, where astrophysical and collider constraints compete. Lower limits on M* are derived in case a) of 8.0 TeV and 1.1 TeV, and in case b) of 16 TeV and 1.9 TeV, for a number of extra dimensions n=3 and n=4 respectively. These limits are especially robust and insensitive to the various uncertainties involved.
M. Cassé, B. Mansoulié and J. Silk
Mon, 28 Oct 19
1/40
Comments: 4 pages, to appear in MNRAS Letters
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