Are Heavy Particles Boltzmann Suppressed ?

  title={Are Heavy Particles Boltzmann Suppressed ?},
  author={Patrizia Bucci}
  • Patrizia Bucci
Matsumoto and Yoshimura have recently argued that the number density of heavy particles in a thermal bath is not necessarily Boltzmann-suppressed for T ≪ M, as power law corrections may emerge at higher orders in perturbation theory. This fact might have important implications on the determination of WIMP relic densities. On the other hand, the definition of number densities in a interacting theory is not a straightforward procedure. It usually requires renormalization of composite operators… CONTINUE READING