Dark-matter decay as a complementary probe of multicomponent dark sectors.

Area of Science:

• Cosmology
• Particle Physics
• Astrophysics

Background:

• Single-component dark matter theories relate production, annihilation, and scattering via crossing symmetries.
• These processes offer complementary dark matter detection strategies.
• Multicomponent dark matter introduces additional complexity and potential detection channels.

Purpose of the Study:

• To explore the concept of dark matter decay as a detection channel in multicomponent theories.
• To investigate how dark matter decay correlates with other detection processes.
• To demonstrate the enhanced complementarity for probing dark matter models.

Main Methods:

• Analysis of 2→2 amplitudes and crossing symmetries in dark matter theories.
• Theoretical modeling of dark matter decay between different components.
• Investigating correlations between decay, production, annihilation, and scattering channels.

Main Results:

• Multicomponent dark matter allows for decay from heavier to lighter components.
• This decay channel introduces a new dimension of complementarity.
• The interplay between decay and other processes enhances model constraints.

Conclusions:

• Dark matter decay is a crucial, complementary detection channel in multicomponent theories.
• Enhanced complementarity from decay significantly aids in probing and constraining dark matter parameter spaces.
• Future research should focus on the implications of these enhanced detection strategies.