Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. submitted time 2017-11-10
Abstract:Motivated by the discovery of gravitational waves (GWs) at aLIGO and no evidence of new physics at current LHC, we discuss that a generic classes of extended new physics models with hidden gauge group could undergo one or several times rst-order phase transitions associated with the gauge group symmetry breaking during the evolution of the universe, which might produce detectable phase transition GWs signals at future GWs experiments, such as eLISA and BBO.
Peer Review Status:Awaiting Review
Subjects: Physics >> Nuclear Physics submitted time 2016-09-05
Abstract: Recently, a novel idea has been proposed to relax the electroweak hierarchy problem through the cosmological inflation and the axion periotic potential. Here, we further assume that only attractive inflation is needed to explain the light mass of the Higgs boson, where we do not need specified periotic potential of the axion field. Attractive inflation during the early universe drives the Higgs boson mass from the large value in the early universe to the small value at present, and the small Higgs mass can technically origin from the cosmological evolution rather than dynamical symmetry or antropics, where the Higgs mass is an evolving parameter of the Universe. Further, we study the possible collider signals or constraints at future lepton collier and the possible constraints from the muon anomalous magnetic moment. A concrete attractive relaxion model is also discussed, which is consistent with the data of Planck 2015.
Peer Review Status:Awaiting Review
Subjects: Physics >> Nuclear Physics submitted time 2016-09-05
Abstract: This is a research highlight invited by SCIENCE CHINA Physics, Mechanics & Astronomy.
Peer Review Status:Awaiting Review
Subjects: Physics >> Nuclear Physics submitted time 2016-08-30
Abstract: In this letter, we explore the nature of the electroweak phase transition (EWPT) with both particle colliders and gravitational wave (GW) detection. With the observed Higgs mass, the shape of the Higgs potential is fully determined within the standard model (SM) of particle physics. However, it could be changed if there exists new physics beyond the SM. Working with the effective field theory, we show that a modified Higgs potential with a sextic term included can keep the observed 125 GeV Higgs mass but behave different when compared with the SM case. Furthermore, this potential can produce a strong first order phase transition (SFOPT) for the electroweak baryogenesis and interestingly predict new phenomena in the Higgs sector, which can be tested at colliders such as the Large Hadron Collider (LHC) and the planning Circular Electron Positron Collider (CEPC). We point out this SFOPT can lead to detectable signals for the GW interferometers , such as eLISA, DECIGO and BBO. Our present study on the EWPT bridges the particle physics at colliders with the astrophysics and cosmology in the early universe.
Peer Review Status:Awaiting Review