Calogero-Moser Models III: Elliptic Potentials and Twisting

Details Calogero-Moser Models III: Elliptic Potentials and Twisting Calogero-Moser Models III: Elliptic Potentials and Twisting

1998-12-25

arxiv.org/abs/hep-th/9812232v1

Prog.Theor.Phys. 101 (1999) 799-829

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX2e with amsfonts.sty, 36 pages, no figures

Scientific paper

10.1143/PTP.101.799

Universal Lax pairs of the root type with spectral parameter and independent coupling constants for twisted non-simply laced Calogero-Moser models are constructed. Together with the Lax pairs for the simply laced models and untwisted non-simply laced models presented in two previous papers, this completes the derivation of universal Lax pairs for all of the Calogero-Moser models based on root systems. As for the twisted models based on B_n, C_n and BC_nroot systems, a new type of potential term with independent coupling constants can be added without destroying integrability. They are called extended twisted models. All of the Lax pairs for the twisted models presented here are new, except for the one for the F_4 model based on the short roots. The Lax pairs for the twisted G_2 model have some novel features. Derivation of various functions, twisted and untwisted, appearing in the Lax pairs for elliptic potentials with the spectral parameter is provided. The origin of the spectral parameter is also naturally explained. The Lax pairs with spectral parameter, twisted and untwisted, for the hyperbolic, the trigonometric and the rational potential models are obtained as degenerate limits of those for the elliptic potential models.

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