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Scattering And Absorption of Light in Planetary Regoliths
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Dark matter from R2 gravity.

Jose A R Cembranos1

  • 1William I. Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, Minnesota 55455, USA.

Physical Review Letters
|April 28, 2009
PubMed
Summary
This summary is machine-generated.

Quantum gravity modifications introduce new degrees of freedom. These new gravitational states may explain the Universe's nonbaryonic dark matter, as shown with R2 gravity.

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Area of Science:

  • Theoretical Physics
  • Cosmology
  • Quantum Gravity

Background:

  • Einstein's theory of gravity requires modification at high energies for a quantum approach.
  • Quantum gravity necessitates the introduction of new degrees of freedom.

Purpose of the Study:

  • To investigate if new gravitational states from modified gravity can constitute nonbaryonic dark matter.
  • To explore R2 gravity as a potential model for dark matter in the early Universe.

Main Methods:

  • Utilizing an effective field theory approach.
  • Analyzing the simplest high-energy modification of the Einstein-Hilbert action, known as R2 gravity.

Main Results:

  • Modification of Einstein gravity at high energies inherently introduces new degrees of freedom.
  • These novel gravitational states are proposed as a candidate for nonbaryonic dark matter.

Conclusions:

  • New gravitational states arising from high-energy modifications of gravity could be the primary component of nonbaryonic dark matter.
  • R2 gravity serves as a foundational example illustrating this dark matter candidate mechanism.