Abstract: 

Light primordial black holes - formed shortly after the end of cosmic inflation - contain crucial information regarding the evolution of the early Universe and its particle physics content. Depending on their masses and spins, primordial black holes can evaporate via Hawking radiation at different times throughout cosmic history, leaving all sorts of imprints that may become measurable soon in cosmological or experimental data. After reviewing general aspects of primordial black hole evaporation in cosmology, I will present recent developments in the field regarding the effect of evaporating PBHs on their environment, as they constantly heat their surroundings locally. I will demonstrate that the existence of such temperature gradients in the plasma around PBHs leads to sizeable modifications of existing bounds on PBHs, highlighting the importance of understanding out-of-equlibrium particle physics around evaporating black holes in the future.

Biography: 

Dr Lucien Heurtier is a Postdoctoral Research Associate in the Theoretical Particle Physics and Cosmology group in the Physics Department of King’s College London. In 2015, Dr Heurtier obtained his PhD from École Polytechnique (France) in theoretical particle physics and cosmology. He then worked in Belgium (Univesité Libre de Bruxelles), the United States (University of Arizona), and in the UK (Durham University), where he achieved important work and published impactful articles on early universe cosmology, particle physics beyond the standard model, and primordial black holes. Dr Lucien Heurtier has also supervised numerous undergraduate and postgraduate students, for which he was awarded the Doctoral Support Award this year by King's College London, and is involved in many outreach activities. Dr Heurtier also organises several high-profile conferences in his field, such as the international NEHOP conference and the UK conference series UK-APP.

Alternative online link： https://meeting.tencent.com/dm/LLuDZDOUh7GS

ID: 894560528