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(Seminar) Quintessence Saves Higgs Instability
2019-01-07  【 】【打印】【关闭

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
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