%0 Journal Article
%T Composite Scalar Dark Matter
%+ Laboratoire Charles Coulomb (L2C)
%+ Universitat Autònoma de Barcelona = Autonomous University of Barcelona = Universidad Autónoma de Barcelona (UAB)
%+ Laboratoire de Physique Théorique de l'ENS [École Normale Supérieure] (LPTENS)
%A Frigerio, Michele
%A Pomarol, Alex
%A Riva, Francesco
%A Urbano, Alfredo
%Z 19 pages + appendices, 16 figures
%< avec comité de lecture
%Z L2C:12-032
%@ 1126-6708
%J Journal of High Energy Physics
%I Springer
%V 2012
%N 7
%P 15
%8 2012-07-03
%D 2012
%Z 1204.2808
%R 10.1007/JHEP07(2012)015
%Z Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
%Z Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
%Z Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]Journal articles
%X We show that the dark matter (DM) could be a light composite scalar $\eta$, emerging from a TeV-scale strongly-coupled sector as a pseudo Nambu-Goldstone boson (pNGB). Such state arises naturally in scenarios where the Higgs is also a composite pNGB, as in $O(6)/O(5)$ models, which are particularly predictive, since the low-energy interactions of $\eta$ are determined by symmetry considerations. We identify the region of parameters where $\eta$ has the required DM relic density, satisfying at the same time the constraints from Higgs searches at the LHC, as well as DM direct searches. Compositeness, in addition to justify the lightness of the scalars, can enhance the DM scattering rates and lead to an excellent discovery prospect for the near future. For a Higgs mass $m_h\simeq 125$ GeV and a pNGB characteristic scale $f \lesssim 1$ TeV, we find that the DM mass is either $m_\eta \simeq 50-70$ GeV, with DM annihilations driven by the Higgs resonance, or in the range 100-500 GeV, where the DM derivative interaction with the Higgs becomes dominant. In the former case the invisible Higgs decay to two DM particles could weaken the LHC Higgs signal.
%G English
%2 https://hal.science/hal-00690000/document
%2 https://hal.science/hal-00690000/file/Composite_Dark_Matter.pdf
%L hal-00690000
%U https://hal.science/hal-00690000
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%~ UPMC
%~ CNRS
%~ LPTENS
%~ L2C
%~ PSL
%~ UPMC_POLE_2
%~ MIPS
%~ UNIV-MONTPELLIER
%~ SORBONNE-UNIVERSITE
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%~ UP-SCIENCES
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