TY  - JOUR
AU  - Liem, S.
AU  - Bertone, G.
AU  - Calore, F.
AU  - Ruiz de Austri, R.
AU  - Tait, T. M. P.
AU  - Trotta, R.
AU  - Weniger, C.
PY  - 2016
DA  - 2016//
TI  - Effective field theory of dark matter: a global analysis
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 077
EP  - 22pp
VL  - 09
IS  - 9
PB  - Springer
KW  - Beyond Standard Model
KW  - Cosmology of Theories beyond the SM
KW  - Effective field theories
AB  - We present global fits of an effective field theory description of real, and complex scalar dark matter candidates. We simultaneously take into account all possible dimension 6 operators consisting of dark matter bilinears and gauge invariant combinations of quark and gluon fields. We derive constraints on the free model parameters for both the real (five parameters) and complex (seven) scalar dark matter models obtained by combining Planck data on the cosmic microwave background, direct detection limits from LUX, and indirect detection limits from the Fermi Large Area Telescope. We find that for real scalars indirect dark matter searches disfavour a dark matter particle mass below 100 GeV. For the complex scalar dark matter particle current data have a limited impact due to the presence of operators that lead to p-wave annihilation, and also do not contribute to the spin-independent scattering cross-section. Although current data are not informative enough to strongly constrain the theory parameter space, we demonstrate the power of our formalism to reconstruct the theoretical parameters compatible with an actual dark matter detection, by assuming that the excess of gamma rays observed by the Fermi Large Area Telescope towards the Galactic centre is entirely due to dark matter annihilations. Please note that the excess can very well be due to astrophysical sources such as millisecond pulsars. We find that scalar dark matter interacting via effective field theory operators can in principle explain the Galactic centre excess, but that such interpretation is in strong tension with the non-detection of gamma rays from dwarf galaxies in the real scalar case. In the complex scalar case there is enough freedom to relieve the tension.
SN  - 1029-8479
UR  - http://arxiv.org/abs/1603.05994
UR  - https://doi.org/10.1007/JHEP09(2016)077
DO  - 10.1007/JHEP09(2016)077
LA  - English
N1  - WOS:000383545500003
ID  - Liem_etal2016
ER  -