Lattice measurement of the energy - gap in a spontaneously broken phase
نویسندگان
چکیده
Using lattice simulations of a one-component (λΦ 4) 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 not the 'Higgs mass' M h but an infrared-sensitive quantity that, conceivably, vanishes in the infinite-volume limit.
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