Electroweak sphalerons in the reduced minimal 3-3-1 model

Vo Quoc Phong, Hoang Ngoc Long, Vo Thanh Van, and Nguyen Chi Thanh
Phys. Rev. D 90, 085019 – Published 21 October 2014

Abstract

We calculate the electroweak sphaleron rates in the reduced minimal 3-3-1 (RM331) model. In the context of the early Universe, this model undergoes a sequence of two first-order phase transitions, SU(3)SU(2) at the TeV scale and SU(2)U(1) at the 102GeV scale, as the Universe cools down from the hot big bang. By a thin-wall approximation, we show that for each phase transition in this sequence, the sphaleron rate is larger than the cosmological expansion rate at temperatures higher than the critical temperature, and after the phase transition, the sphaleron process is decoupled. This may provide the baryon-number violation (B violation) necessary for baryogenesis in the relationship with nonequilibrium physics in the early Universe.

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  • Received 26 August 2014

DOI:https://doi.org/10.1103/PhysRevD.90.085019

© 2014 American Physical Society

Authors & Affiliations

Vo Quoc Phong*

  • Department of Theoretical Physics, Ho Chi Minh City University of Science, Ho Chi Minh City 70250, Vietnam

Hoang Ngoc Long

  • Institute of Physics, Vietnamese Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi 10000, Vietnam

Vo Thanh Van and Nguyen Chi Thanh§

  • Department of Theoretical Physics, Ho Chi Minh City University of Science, Ho Chi Minh City 70250, Vietnam

  • *vqphong@hcmus.edu.vn
  • hnlong@iop.vast.ac.vn
  • vtvan@hcmus.edu.vn
  • §ncthanh.phs@gmail.com

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Issue

Vol. 90, Iss. 8 — 15 October 2014

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