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X-WR-CALNAME:Observing the Big Bang
X-ORIGINAL-URL:https://cosmology.nl
X-WR-CALDESC:Events for Observing the Big Bang
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TZID:Europe/Amsterdam
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DTSTART:20190331T010000
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DTSTART:20191027T010000
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DTSTART;TZID=Europe/Amsterdam:20191206T140000
DTEND;TZID=Europe/Amsterdam:20191206T173000
DTSTAMP:20260407T161655
CREATED:20190925T083321Z
LAST-MODIFIED:20191204T083447Z
UID:423-1575640800-1575653400@cosmology.nl
SUMMARY:Amsterdam Fall 2019
DESCRIPTION:Amsterdam\,  December 6th.  \nThe meeting will take place in Amsterdam\, at Nikhef\, Science Park 105\, in room H331. \n \n14:00 – 15:00: Talk by Toshifumi Noumi (Kobe University) \nTitle:Enlarging the scope of the cosmological collider: Beyond the positivity bounds \nAbstract: \nThe energy scale of inflation could be as high as 10^14 GeV\, hence it is a phenomenon at the highest energy scale we may explore. Primordial non-Gaussianities can then be thought of as a 10^14 GeV collider (dubbed the cosmological collider)\, which may be used to probe new particles at the inflationary scale. In this talk I will discuss how to read of the mass and spin of new particles at various scales from non-Gaussianities. In particular I will demonstrate that signs of inflaton effective interactions (which are not constrained by the positivity bounds) are useful to probe spins of particles heavier than the Hubble scale.  \n15:00 – 15:30: Coffee Break \n15:30 – 16:30: Talk by Alex Cole(University of Wisconsin-Madison) \nTitle: Simplices in the Sky — Constraining Cosmology with Computational Topology \n \nAbstract: \nIn this talk\, I will describe how persistent homology\, a somewhat recent development in computational topology and the main pillar of Topological Data Analysis (TDA)\, is a useful tool for characterizing cosmological observables in the search for new physics. After motivating the utility of developing new perspectives for analyzing cosmological data\, I will review the basics of persistent homology. I will then describe how persistent homology connects to several topological statistics that have appeared previously in the cosmology literature\, and how it is strictly more powerful than these statistics. To see how much mileage our improved method gives us\, I will outline two applications of persistent homology to cosmology: one project with G. Shiu on primordial non-Gaussianity and the CMB (1712.08159)\, and work in progress with G. Shiu and M. Biagetti regarding LSS. \n16:30 – 17:30: Borrel
URL:https://cosmology.nl/event/amsterdam-fall-2019/
LOCATION:NIKHEF\, Science Park 105\, Amsterdam\, 1098 XG
CATEGORIES:THC meeting
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