BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Finite-temperature bubble nucleation with shifting scale hierarchi
 es
DTSTART:20260511T120000Z
DTEND:20260511T140000Z
DTSTAMP:20260506T200100Z
UID:indico-event-50512@agenda.infn.it
DESCRIPTION:Speakers: Philipp Schicho (University of Geneva)\n\nScale hier
 archies are required to reliably describe the thermodynamics of cosmologic
 al first-order phase transitions using perturbation theory. At finite temp
 erature\, such a hierarchy is provided naturally. One can then use this hi
 erarchy to construct a three-dimensional effective field theory (EFT) that
  systematically includes thermal resummations to all orders.\n \nUsing th
 is EFT framework\, I focus on supercooled phase transitions in models with
  classical scale symmetry [1\,2]. By computing the bubble nucleation rate 
 and accounting for the presence of varying energy scales\, I examine the l
 imitations of derivative expansions in constructing a thermal effective fi
 eld theory for bubble nucleation. In particular\, for gauge-field fluctuat
 ions\, the derivative expansion breaks down beyond the first two terms due
  to strong variations in gauge-field masses between the high- and low-temp
 erature phases.\n \nBy directly computing these contributions using the f
 luctuation determinant\, I demonstrate how this approach significantly imp
 roves nucleation rate calculations compared to leading-order results\, pro
 viding a more robust framework for predicting gravitational-wave signals f
 rom supercooled phase transitions.\n \n[1] M. Kierkla\, P. Schicho\, B. S
 wiezewska\, T. V. I. Tenkanen\, and J. van de Vis\, Finite-temperature bub
 ble nucleation with shifting scale hierarchies\, JHEP 07\, 153 (2025)\,[25
 03.13597].[2] M. Kierkla\, N. Ramberg\, P. Schicho\, and D. Schmitt\, Theo
 retical uncertainties forprimordial black holes from cosmological phase tr
 ansitions\, (2025)\, [2506.15496].\n\nhttps://agenda.infn.it/event/50512/
URL:https://agenda.infn.it/event/50512/
END:VEVENT
END:VCALENDAR