APS -Spring 2017 Joint Meeting of the Texas Section of AAPT, Texas Section of APS, and Zone 13 of the Society of Physics Students - Event - The influence of dark energy on the expansion rate of the universe and its effects on dark matter relic abundance

摘要

The expansion rate of the universe had a strong influence on the origin of the dark matter abundance during the early stagesof the universe’s evolution, mainly prior to big-bang nucleosynthesis. Any departure of the expansion rate of the universe from the standardcosmological model during that time can modify the dark matter abundance. In this talk, I will explore the role played by a scalar field onthe modification of the expansion rate of the universe arising from scalar-tensor theories of gravity coupled both conformally and disformallyto matter, and also, I will show how these variations to the expansion rate would modify the dark matter content of the Universe.