Chemical Equilibration in Neutron Star Mergers*

In this talk, we will explore the role of chemical equilibrium in dense matter and its potential influence on fluid dynamics in neutron star mergers. Chemical equilibrium refers to the establishment of steady-state particle fractions via weak decay processes. Rapid changes in temperature and density can drive fluid elements out of chemical equilibrium, and weak interactions can restore equilibrium on a timescale that can be comparable to the fluid flow dynamics. We will examine the possibility that chemical equilibration could affect the post-merger gravitational wave emission and leave observable signatures.