(Seminar) The Secret Higgstory: Cosmological Signals of the Standard Model

CAS Key Laboratory of Theoretical Physics

Institute of Theoretical Physics

Chinese Academy of Sciences

ITP-CAS Gravity and Cosmology Seminar 3

Title

题目

The Secret Higgstory: Cosmological Signals of the Standard Model

Speaker

报告人

Samuel Passaglia

Affiliation

所在单位

Kavli Institute of Physics and Mathematics of the Universe

Date

日期

Mar 23, 2021 02:00 PM Beijing

Venue

地点

https://zoom.com.cn/j/98396632459?pwd=eGxVQVo0SVY0NHdPR1lUNnNqcGp6UT09
Meeting ID: 983 9663 2459
Passcode: 999036

Contact Person

所内联系人

皮石

Abstract

摘要

The history of the Higgs during inflation is the closest point of contact between particle physics and cosmology. This history leads to cosmological signals which dramatically show the union of the Standard Model and Lambda-CDM.  Depending on the energy scale of inflation and how quickly the inflaton decays at reheating, the Higgs plays different roles: it can act as a curvaton; it can modulate the decay of the inflaton; and its own decay can change the thermal history of the universe. I will present new insights on these signals. First I will focus on whether Higgs fluctuations can form primordial black hole dark matter when it explores its large-field instability. Then I will show how in our familiar electroweak vacuum the HIggs can set the maximum temperature our universe ever achieved, with important cosmological consequences.