[Astro] [CAPT] CAPT Weekly Bulletin (w/c 28-10-24)

[Ella Batchelor]

Tuesdays at 11am, CAPT Foyer – Astro Coffee



Tuesday 29th October, A113 CAPT at 11am – Astronomy Journal Club



Tuesday 29th October, A113 CAPT at 1pm – Particle Cosmology and Gravity Seminar

Santi Aguei-Salcedo (DAMTP, Cambridge University)

The Open Effective Field Theory of Inflation


There is an increasing interest in the interplay between Open Quantum Systems and Inflationary Physics. A time-dependent background and limited access to the degrees of freedom invites the use of Open Quantum systems. It provides a more general framework than the unitary time evolution of a free state. In this talk, based on https://arxiv.org/abs/2404.15416, we develop a local EFT for the scalar curvature perturbations subject to the dynamics of an open quantum system. We focus on recovering the scale-invariant power spectrum and its amplitude as a function of the dissipation (among other EFT parameters). Our results largely generalize the setup of warm inflation to general non-equilibrium cases. We also explore the different shapes of the bispectrum and find two distinct behaviors, at large and small dissipation.



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

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Wednesday 30th October, B13 Physics at 3pm – School Colloquium

Harry Cliff (Cambridge)

Rare beauty - the hunt for new physics at the LHCb experiment



When the Large Hadron Collider (LHC) began its physics programme in 2009, there were high hopes that supersymmetric particles, dark matter, micro black holes or other weird and wonderful phenomena would soon be discovered. But despite hundreds of searches performed by thousands of physicists over the past fifteen years, no direct evidence of physics beyond the standard model has been found. However, over the past few years, several intriguing anomalies in the rare decays of beauty quarks have been reported by the LHCb experiment. I will discuss what the causes of these anomalies may be - theory errors, experimental biases or perhaps genuine signs of new physics - and how the recent LHCb upgrade will allow us to zoom in even closer on these tantalising hints.



Refreshments served in C10 after the Colloquium

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Thursday 31st October at 1pm, A113 CAPT – Astronomy Lunch Talk

Emma Chapman



Thursday 31st October, A113 CAPT at 3pm – Particle Cosmology Journal Club
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Fridays at 2pm, A113 CAPT – CAPT Coding Club

Fridays at 4pm, CAPT Foyer – CAPT Cakes
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If you have any events/visitors you would like included in next week’s bulletin, please let me know


Best wishes

Ella

Ella Batchelor (she/her)
Administrator

School of Physics & Astronomy

University of Nottingham
A112a Centre for Astronomy & Particle Theory
University Park
Nottingham, NG7 2RD

+44 (0) 115 74 86778 |  nottingham.ac.uk<http://nottingham.ac.uk/>

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