Imperial College London

ProfessorRobertoTrotta

Faculty of Natural SciencesDepartment of Physics

Professor of Astrostatistics; CLCC Director
 
 
 
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Contact

 

+44 (0)20 7594 7793r.trotta Website CV

 
 
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Assistant

 

Mrs Sheila Ekudo +44 (0)20 7594 2086

 
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Location

 

1009Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Liem:2016:10.1007/JHEP09(2016)077,
author = {Liem, S and Bertone, G and Calore, F and Ruiz, de Austri R and Tait, TMP and Trotta, R and Weniger, C},
doi = {10.1007/JHEP09(2016)077},
journal = {The Journal of High Energy Physics},
title = {Effective field theory of dark matter: a global analysis},
url = {http://dx.doi.org/10.1007/JHEP09(2016)077},
volume = {2016},
year = {2016}
}

RIS format (EndNote, RefMan)

TY  - JOUR
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.
AU - Liem,S
AU - Bertone,G
AU - Calore,F
AU - Ruiz,de Austri R
AU - Tait,TMP
AU - Trotta,R
AU - Weniger,C
DO - 10.1007/JHEP09(2016)077
PY - 2016///
SN - 1029-8479
TI - Effective field theory of dark matter: a global analysis
T2 - The Journal of High Energy Physics
UR - http://dx.doi.org/10.1007/JHEP09(2016)077
UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000383545500003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR - http://hdl.handle.net/10044/1/43686
VL - 2016
ER -