1998/08/24 by Michael C. Birse, Birse, Michael C., Judith A. McGovern +3
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear physics research studies #Quantum, superfluid, helium dynamics #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9808398
11 pages (RevTeX), Talk given by K. Richardson at The 11th Summer School and Symposium on Nuclear Physics (NuSS'98) ``Effective Theories of Matter'', held in Seoul National University, June 23-26, 1998
arxiv created 1998/08/24 · openalex publication_date 1998/08/24 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Nonrelativistic two-body scattering by a short-ranged potential is studied using the renormalisation group. Two fixed points are identified: a trivial one and one describing systems with a bound state at zero energy. The eigenvalues of the linearised renormalisation group are used to assign a systematic power-counting to terms in the potential near each of these fixed points. The expansion around the nontrivial fixed point defines a power counting scheme which is equivalent to the effective-range expansion.