Calogero-Moser Models II: Symmetries and Foldings

Details Calogero-Moser Models II: Symmetries and Foldings Calogero-Moser Models II: Symmetries and Foldings

1998-09-10

arxiv.org/abs/hep-th/9809068v3

Prog.Theor.Phys. 101 (1999) 487-518

Physics

High Energy Physics

High Energy Physics - Theory

36 pages, LaTeX2e with amsfonts.sty, no figures

Scientific paper

10.1143/PTP.101.487

Universal Lax pairs (the root type and the minimal type) are presented for Calogero-Moser models based on simply laced root systems, including E_8. They exist with and without spectral parameter and they work for all of the four choices of potentials: the rational, trigonometric, hyperbolic and elliptic. For the elliptic potential, the discrete symmetries of the simply laced models, originating from the automorphism of the extended Dynkin diagrams, are combined with the periodicity of the potential to derive a class of Calogero-Moser models known as the `twisted non-simply laced models'. For untwisted non-simply laced models, two kinds of root type Lax pairs (based on long roots and short roots) are derived which contain independent coupling constants for the long and short roots. The BC_n model contains three independent couplings, for the long, middle and short roots. The G_2 model based on long roots exhibits a new feature which deserves further study.

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