A few corrections

Universality and Leading Corrections in Few-Body Systems

A large two-body scattering length leads to universal behavior in few-body systems. In particular, the three-body system displays interesting features such as exact discrete scale invariance in the bound state spectrum in the limit of infinite scattering length. Here, I will discuss how an effective field theory (EFT) can be used to study these features and how the finite range of the underlyin...

Correlated scattering corrections to eikonal few-body models

A basic assumption which underpins recent applications of eikonal few-body models to nuclear scattering and nuclear reactions is that of the addition of the constituent scattering phases. We investigate the accuracy of this assumption in the case of the elastic scattering of He, treated as a five-constituent (a14n) system, from a light target nucleus at energies of 10’s of MeV/nucleon. To do so...

Full one-loop corrections to the relic density in the MSSM: A few examples

We show the impact of the electroweak, and in one instance the QCD, one-loop corrections on the relic density of dark matter in the MSSM which is provided by the lightest neutralino. We cover here some of the most important scenarii: annihilation into fermions for a bino-like neutralino, annihilation involving gauge bosons in the case of a mixed neutralino, the neutralinostau co-annihilation re...

Additions and Corrections

Effective Range Corrections in Few - Body Systems with large Scattering Length

The effective field theory with contact interactions alone is a powerful tool to compute low-energy observables for three-body systems with large scattering length. Recent calculations including effective range corrections are discussed and results are presented.