Journal Article

PreJuSER-33744

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Quasiparticle Properties in Effective Field Theory

Platter, L.FZJ* ; Hammer, H. W. ; Meissner, U. G.FZJ*

2003
North-Holland Publ. Co. Amsterdam

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Please use a persistent id in citations: http://hdl.handle.net/2128/10716  doi:10.1016/S0375-9474(02)01365-9

Abstract: The quasiparticle concept is an important tool for the description of many-body systems. We study the quasiparticle properties for dilute Fermi systems with short-ranged, repulsive interactions using effective field theory. We calculate the proper self-energy contributions at order (k(F)/Lambda)(3), where A is the short-distance scale that sets the size of the effective range parameters and k(F) the Fermi momentum. The quasiparticle energy, width, and effective mass to O((k(F)/Lambda)(3)) are derived from the calculated self-energy. (C) 2002 Elsevier Science B.V. All rights reserved.

Keyword(s): many-body problem ; Fermi gas ; dilute gas approximation ; force: short-range ; effective Lagrangian ; propagator: renormalization ; quasiparticle: energy ; quasiparticle: width ; quasiparticle: mass spectrum ; potential: chemical ; numerical calculations ; effective field theory (auto) ; quasiparticles (auto) ; Fermi systems (auto)

Note: Record converted from VDB: 12.11.2012; 15 pages, revtex4, 4 PS figures

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Contributing Institute(s):

1. Institut 3 (Theoretische Kernphysik) (IKP-TH)

Research Program(s):

1. Physik der Hadronen (M01)

Appears in the scientific report 2003

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Database coverage:

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