Final answer:
Dark matter candidates include neutralinos and particles that circulate in tiny rings set up by extra spatial dimensions.
Step-by-step explanation:
Dark matter candidates include neutralinos and particles that circulate in tiny rings set up by extra spatial dimensions.
Neutralinos are hypothetical particles that exist in supersymmetry theory, where they are the partners of Z bosons, photons, and Higgs bosons. They are stable and have weak interactions with ordinary matter, making them a possible candidate for dark matter.
Particles that circulate in tiny rings set up by extra spatial dimensions are another possible candidate for dark matter. In theories that propose the existence of extra dimensions, particles can become trapped in these compact dimensions, creating a ring-like structure. These particles would have weak interactions with ordinary matter and could potentially account for the observed dark matter in the universe.