physlettb755_439.pdf 260 KB
Haba, Naoyuki Graduate School of Science and Engineering, Shimane University
Ishida, Hiroyuki Graduate School of Science and Engineering, Shimane University
Kitazawa, Noriaki Department of Physics, Faculty of Science, Hokkaido University
Yamaguchi, Yuya Graduate School of Science and Engineering, Shimane University : Department of Physics, Faculty of Science, Hokkaido Universit
We propose a new dynamics of the electroweak symmetry breaking in a classically scale invariant version of the standard model. The scale invariance is broken by the condensations of additional fermions under a strong coupling dynamics. The electroweak symmetry breaking is triggered by negative mass squared of the elementary Higgs doublet, which is dynamically generated through the bosonic seesaw mechanism. We introduce a real pseudo-scalar singlet field interacting with additional fermions and Higgs doublet in order to avoid massless Nambu?Goldstone bosons from the chiral symmetry breaking in a strong coupling sector. We investigate the mass spectra and decay rates of these pseudo-Nambu?Goldstone bosons, and show they can decay fast enough without cosmological problems. We further show that our model can make the electroweak vacuum stable.
Physics letters. B
© 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.
Interdisciplinary Graduate School of Science and Engineering