Approximate Dirac delta functionImmersed boundary (IB) methodLevel set methodsWe investigate the convergence rate of the solutions of one and two-dimensional Poisson-type PDEs where the Dirac delta function, representing the forcing term, is approximated by several expressions. The goal is to see if...
Only in the Moeller velocity or in a delta function that enforces 3-momentum and energy conservation, pa denotes the 4-momentum. –7– non-relativistic dark sector particles χ1 and χ2 and relativistic involved SM fermions around freeze-out, the reaction densities for (co)annihilations in ...
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