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Sep 27 – 30, 2016
DESY Hamburg
Europe/Berlin timezone

Metastability, Chaotic Inflation, and Primordial Black Holes

Sep 29, 2016, 2:30 PM
Seminar room 2 (DESY Hamburg)

Seminar room 2

DESY Hamburg

Notkestrasse 85, 22607 Hamburg
Cosmology & Astroparticle Physics Parallel Session: Cosmology & Astroparticle Physics


Dr Kyohei Mukaida (Kavli IPMU)


We revisit the compatibility between chaotic inflation, which provides a natural solution to the initial condition problem, and the metastable electroweak vacuum, which is suggested by the results of the LHC and the current mass measurements of top quark and Higgs boson. It is known that chaotic inflation poses a threat to the stability of the electroweak vacuum because it easily generates large Higgs fluctuations during inflation or preheating and triggers the catastrophic vacuum decay. In this talk, we would like to explain a simple cosmological solution in which the vacuum is stabilized during chaotic inflation, preheating and afterwards. This simple solution naturally predicts formation of primordial black holes. We find interesting parameter regions where the present dark matter density is provided by them. Gravitational waves could be used as an interesting probe. Also, the thermal leptogensis can be accommodated in our scenario.

Primary author

Dr Kyohei Mukaida (Kavli IPMU)


Prof. Masahiro Kawasaki (ICRR) Prof. T. Tsutomu Yanagida (Kavli IPMU)

Presentation materials