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(Seminar) Quintessence Saves Higgs Instability

01/07 2019
  • Title (Seminar) Quintessence Saves Higgs Instability
  • Speaker
  • Date
  • Venue
  • Abstract

    CAS Key Laboratory of Theoretical Physics

    Institute of Theoretical Physics

    Chinese Academy of Sciences

    Seminar

    Title

    题目

    Quintessence Saves Higgs Instability

    Speaker

    报告人

    韩成成

    Affiliation

    所在单位

    IPMU, 东京大学

    Date

    日期

    2019年1 月 7 日(周一)下午 4:00

    Venue

    地点

    Room 6420, ITP NEW BUILDING

    Abstract

    摘要

    We study a model where quintessence potential e^?ξφ coupled to Higgs potential. We calculate the evolution of the quintessence, and track the running of the effective Higgs self-coupling. We find it slightly larger than that of the standard model in the past. Requiring the electroweak vacuum to be absolutely stable in inflationary era, we find a lower bound ξ>0.35±0.05, where the uncertainty is mainly from the measurement of the top quark mass. This lower bound, together with the upper bound from the observation for dark energy ξ?0.6, narrows down the parameter space and makes it possible to test this model in the near future. Interestingly, the bound on ξ, if actually shown to be the case by observation, supports the recently proposed Swampland Conjecture.

    Contact Person

    所内联系人

    杨金民  李田军