Universality and Leading Corrections in Few-Body Systems

Details Universality and Leading Corrections in Few-Body Systems Universality and Leading Corrections in Few-Body Systems

2008-12-30

arxiv.org/abs/0812.4992v1

Physics

Nuclear Physics

Nuclear Theory

4 pages, 2 figures, Proceedings of the workshop "Critical Stability of Few-Body Quantum Systems" 2008

Scientific paper

10.1007/s00601-009-0032-9

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 underlying interaction impacts the bound state spectrum at first order in the EFT expansion.

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