Lattice measurement of the energy-gap in a spontaneously broken phase

2001/01/19 by P. Cea, Cea, P., M. Consoli +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #hep-lat #hep-ph #hep-th

paper · pdf · doi:10.48550/arxiv.hep-ph/0101219

11 pages, 4 figures, 1 table. Revised version with more statistics and other measured quantities

arxiv created 2001/03/22 · arxiv updated 2009/11/30

Abstract

Using lattice simulations of a one-component (λΦ⁴)₄ theory, we have measured the energy spectrum ω(k) in the broken phase at various lattice sizes. Our data show that the energy-gap ω(0) is \it not the `Higgs mass' M_h but an infrared-sensitive quantity that becomes smaller and smaller by increasing the lattice size and may even vanish in the infinite-volume limit.

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