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Zero temperature lattice Weinberg-Salam model for the values of the cutoff Λ∼1  TeV

M. A. Zubkov

  • ITEP, B. Cheremushkinskaya 25, Moscow, 117259, Russia

  • *zubkov@itep.ru
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Phys. Rev. D 85, 073001 – Published 2 April, 2012

DOI: https://doi.org/10.1103/PhysRevD.85.073001

Abstract

The lattice Weinberg-Salam model at zero temperature is investigated numerically. We consider the model for the following values of the coupling constants: the Weinberg angle θW∼30°, the fine structure constant α∼(1/150), and the Higgs mass MH∼150  GeV. We find that the fluctuational region begins at the values of the cutoff Λ above about 0.8 TeV. In this region the average distance between Nambu monopoles is close to their sizes. At Λ>1.1  TeV the Nambu monopole currents percolate. Within the fluctuational region the considered definitions of the scalar field condensate give values that differ from the expected one 2Mz/gz. We consider the given results as an indication that the nonperturbative effects may be present in the Weinberg-Salam model at the large values of the cutoff. Our numerical results were obtained on the lattices of sizes up to 163×32.

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Phys. Rev. D 85, 073001– Published 2 April, 2012
  • Received 19 October 2011

© 2012 American Physical Society

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