Vector meson at non-zero baryon density and zero sound

Details Vector meson at non-zero baryon density and zero sound Vector meson at non-zero baryon density and zero sound

2004-08-05

arxiv.org/abs/hep-lat/0408007v1

Strong and Electroweak Matter 2004 by K.J. Eskola (Editor), K. Kainulainen (Editor), K. Kajantie (Editor), K. Rummukainen (Edi

Physics

High Energy Physics

High Energy Physics - Lattice

5 pages, Contribution to Strong and Electroweak Matter 2004 (SEWM04), Helsinki, Finland 16-19 June 2004

Scientific paper

We present simulation results of the (2+1)d four-fermion model with a baryon chemical potential. We examine temporal correlation functions of the vector meson, and find evidence of phonon-like behavior characterised by a linear dispersion relation in the long wavelength limit. We also discuss the consistency of our numerical results with analytical solutions to the Boltzmann equation corresponding to zero sound. We argue that our results provide the first evidence for a collective excitation in a lattice simulation.

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