[Astro] [CAPT] Particle Cosmology and Gravity Seminar: Anna Kormu

[Elisa Todarello]

Dear All,

                  We have a seminar this week whose details are provided below.
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Speaker: Anna Kormu (U. Helsinki)

Seminar date: April 1st, Tuesday, 1 pm UK time

Venue: Seminar Room A 113 (Cripps North Building, CAPT)


Title: Trouble in the Bubble - Testing Bubble Nucleation Calculations for Strong Phase Transitions


Abstract:  Nucleation rate computations are of broad importance in particle physics and cosmology. Previously, these nucleation rates have generally been calculated perturbatively, but those calculations depend on the semiclassical picture of the bubble and its fluctuations, and different orders of perturbative calculation yield very different results. In this talk, I will give you an update on the results of our lattice calculations of the nucleation rate. We focused on a real scalar theory with a tree-level potential barrier and performed nonperturbative simulations to determine the nucleation rate, computing a final result extrapolated to the thermodynamic and continuum limits. Although the system in question should be well-described by a complete one-loop perturbative calculation, we find only qualitative agreement with the full perturbative result. Our result motivates further testing of the current nucleation paradigm.

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Link to join:

 https://teams.microsoft.com/l/meetup-join/19%3ameeting_OGM3OTk5NzQtZWEwZS00ZmUyLTk3MGUtZjFhY2M5OTU2MjI1%40thread.v2/0?context=%7b%22Tid%22%3a%2267bda7ee-fd80-41ef-ac91-358418290a1e%22%2c%22Oid%22%3a%22f3250584-4b5f-48fa-a897-08e77f2246b7%22%7d



List of upcoming Seminars:

08th April: Tales of Gravity Conference
15th April: Kieran Wood (Nottingham)
22nd April: Isobel Romero (Cambridge)
29th April: Daniel Panizo (Kyoto U)
6th May: Ameek Malhotra (Swansea)
13th May: David Trestini (Southampton)
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With Regards,
-Elisa & Swagat

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