# Holography, relaxions and the self-tuning of the cosmological constant

- Institution: CERN
- Department: Conferences & Workshops
- Speaker: Yuta Hamada
- Year: 2019
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3001527)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

Holography allows a mechanism for the self-tuning of the cosmological constant by considering a universe brane embedded in a bulk dual to a holographic QFT. This mechanism was shown recently to work bypassing earlier problems with bad bulk singularities. By including also a bulk axion (dual to an instanton density of the holographic QFT), we consider the interplay of the self-tuning mechanism and the Electroweak symmetry breaking on the universe brane. Holography provides a large number of saddle point selftuning solutions. Such an approach links relaxion ideas for the hierarchy problem to the self-tuning mechanism of the cosmological constant..

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## Lectures

1. [Holography, relaxions and the self-tuning of the cosmological constant](https://invisiblenetwork.ai/learn/cern/3001527/eb37d37472d4), 15 min (CERN's player)