scholarly journals Isocurvature constraints on gravitationally produced superheavy dark matter

2005 ◽  
Vol 72 (2) ◽  
Author(s):  
Daniel J. H. Chung ◽  
Edward W. Kolb ◽  
Antonio Riotto ◽  
Leonardo Senatore
Keyword(s):  
Dark Matter ◽  
Superheavy Dark Matter

scholarly journals Superheavy dark matter and parametric resonance

1999 ◽  
Vol 449 (3-4) ◽  
pp. 230-236 ◽  
Author(s):  
Masato Arai ◽  
Hideaki Hiro-Oka ◽  
Nobuchika Okada ◽  
Shin Sasaki
Keyword(s):  
Dark Matter ◽  
Parametric Resonance ◽  
Superheavy Dark Matter

scholarly journals Superheavy dark matter in $$R+R^2$$ cosmology with conformal anomaly

2020 ◽  
Vol 80 (11) ◽  
Author(s):  
E. V. Arbuzova ◽  
A. D. Dolgov ◽  
R. S. Singh
Keyword(s):  
Dark Matter ◽  
Coupling Strength ◽  
Modified Gravity ◽  
Particle Creation ◽  
Cosmological Evolution ◽  
Particle Mass ◽  
Conformal Anomaly ◽  
Gauge Bosons ◽  
Superheavy Dark Matter

AbstractCosmological evolution and particle creation in $$R^2$$ R 2 -modified gravity are considered for the case of the dominant decay of the scalaron into a pair of gauge bosons due to conformal anomaly. It is shown that in the process of thermalization superheavy dark matter with the coupling strength typical for the GUT SUSY can be created. Such dark matter would have the proper cosmological density if the particle mass is close to $$10^{12}$$ 10 12 GeV.

scholarly journals Hunting for superheavy dark matter with the highest-energy cosmic rays

2019 ◽  
Vol 99 (10) ◽  
Author(s):  
Esteban Alcantara ◽  
Luis A. Anchordoqui ◽  
Jorge F. Soriano
Keyword(s):  
Dark Matter ◽  
Cosmic Rays ◽  
Superheavy Dark Matter

CONSTRAINING SHDM MODEL OF UHECR WITH SUGAR DATA

2004 ◽  
Vol 19 (13n16) ◽  
pp. 1137-1144 ◽  
Author(s):  
HANG BAE KIM
Keyword(s):  
Dark Matter ◽  
Cosmic Rays ◽  
Galactic Center ◽  
High Energy ◽  
Ultra High Energy ◽  
Arrival Direction ◽  
High Energy Cosmic Rays ◽  
Superheavy Dark Matter

We focus on the arrival direction distributions of the ultra-high energy cosmic rays (UHECR) in search of their possible origins. Models which associate the origin of UHECR with decays of relic superheavy dark matter particles (SHDM) predict the anisotropy of UHECR flux toward the Galactic center. We use the existing SUGAR data, which cover the Galactic center, to look for such a signal and limit the fraction of UHECR produced by this mechanism.

scholarly journals Superheavy dark matter with discrete gauge symmetries

1998 ◽  
Vol 58 (10) ◽  
Author(s):  
K. Hamaguchi ◽  
Yasunori Nomura ◽  
T. Yanagida
Keyword(s):  
Dark Matter ◽  
Gauge Symmetries ◽  
Superheavy Dark Matter
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