Speaker
Описание
Data from the Large Hadron Collider lead to strong constraints on the parameter space of low-energy supersymmetry. In particular, these data practically exclude supersymmetric dark matter (DM) in the traditional cosmology. We argue that in $R^2$-modified gravity superheavy particles with the interaction strength typical for supersymmetry can be realistic candidates for the role of the carriers of dark matter. For this purpose we examined the heating of the universe at the post-inflationary stage due to decays of the scalaron into several dominant channels and calculated the cosmological density of dark matter. The constraints on the masses of DM particles are obtained for different decay modes. Possible observational manifestations of decays and annihilation of superheavy dark matter particles in the spectrum of high-energy cosmic rays are discussed.
Information on the subject:
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E.V. Arbuzova, A.D. Dolgov and R.S. Singh,
``Dark matter in $R+R^2$ cosmology,''
JCAP 04 (2019), 014
[arXiv:1811.05399 [astro-ph.CO]]. -
E.V. Arbuzova, A.D. Dolgov and R.S. Singh,
``Superheavy dark matter in $R+R^2$ cosmology with conformal anomaly,''
Eur. Phys. J. C 80 (2020) no.11, 1047
[arXiv:2002.01931 [hep-ph]]. -
E.V. Arbuzova, A.D. Dolgov and R.S. Singh,
``$R^2$-Cosmology and New Windows for Superheavy Dark Matter,''
Symmetry 13 (2021) no.5, 877 -
E.V. Arbuzova, A.D. Dolgov and A.S. Rudenko,
``Calculations of Scalaron Decay Probabilities,''
Phys. Atom. Nucl. \textbf{86} (2023) no.3, 266-276
[arXiv:2112.11288 [hep-ph]]. -
E.V. Arbuzova, A.D. Dolgov and A.A. Nikitenko,
``Cosmic rays from heavy particle decays,''
[arXiv:2305.03313 [hep-ph]].
