Dilaton-assisted dark matter

Area of Science:

• Particle Physics
• Cosmology
• Astrophysics

Background:

• Dark matter interactions with the Standard Model are not fully understood.
• A dilaton particle is a potential mediator for these interactions.
• The relic abundance of dark matter provides a key constraint.

Purpose of the Study:

• Investigate the dilaton as a dark matter messenger.
• Relate dark matter properties (mass, spin) to the conformal breaking scale.
• Predict dark matter-nucleon cross-sections and observable signals.

Main Methods:

• Utilize dark matter relic abundance to constrain dilaton properties.
• Calculate the dark matter-nucleon spin-independent cross-section.
• Analyze constraints from LEP and Tevatron experiments.
• Compute the gamma-ray signal from dark matter annihilation to dilatons.

Main Results:

• The dilaton mass is predicted based on its relation to dark matter properties.
• Current experimental data from LEP and Tevatron place constraints on the dilaton.
• The Fermi Large Area Telescope could detect a specific gamma-ray signal from dark matter annihilation into dilatons.

Conclusions:

• The dilaton is a viable candidate for mediating dark matter interactions.
• Experimental constraints significantly limit dilaton properties.
• Future gamma-ray observations hold potential for dilaton discovery.