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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:20150329T010000
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DTSTART:20151025T010000
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DTSTART;TZID=Europe/Amsterdam:20151204T123000
DTEND;TZID=Europe/Amsterdam:20151204T173000
DTSTAMP:20260513T141012
CREATED:20151020T074945Z
LAST-MODIFIED:20160321T115333Z
UID:114-1449232200-1449250200@cosmology.nl
SUMMARY:Amsterdam Fall 2015
DESCRIPTION:Note: the UvA THC meeting will take place at NIKHEF instead\, due to the unavailability of a suitable seminar room on Friday December 4. In addition there are in fact 3 (excellent!) speakers\, which unfortunately implies we have to skip the sound-bite sessions this time around. See you all in room H331 at NIKHEF on Friday December 4. \n12:30-13:30 in H331 (NIKHEF): \nSpeaker: Jens Chluba (IoA\, Cambridge). \nTitle: Science with CMB Spectral Distortions: a New Window to Early-Universe and Particle Physics \nSince COBE/FIRAS we know that the CMB spectrum is extremely close to a perfect blackbody. There are\, however\, a number of processes in the early Universe that should create spectral distortions at a level that is within reach of present day technology. I will give an overview of recent theoretical and experimental developments\, explaining why future measurements of the CMB spectrum will open up an unexplored window to early-universe and particle physics\, with possible non-standard surprises but also several guaranteed signals awaiting us. I will also highlight the complementarity of the distortion signals and the CMB anisotropies\, illustrating how future distortions measurements will shed new light on different inflation models. \n\n14:15-15:15 in H331 (NIKHEF): \nSpeaker: David Marsh (King’s College London) \nTitle: Axion Cosmology\, from strings to dwarf galaxies \nAxions comprise a broad class of particles that can play a major role in explaining the unknown aspects of cosmology. They are also extraordinarily well-motivated within high energy physics\, and so axion cosmology offers us a unique view onto these theories. I will provide an overview of theories of axions in field theory\, and their role in solving the strong-CP problem. I will then motivate the existence of the “String Axiverse:” the idea that a plethora of axions are a generic prediction of low energy string theory. I then discuss axion cosmology\, and how the CMB and large scale structure can be used to place robust bounds on axion (and other boson) masses as dark matter candidates. Next\, I will show how the so-called “small-scale crises” of cold dark matter can be solved by a generic string axion\, pointing to a specific axion mass and decay constant scale. This scenario makes predictions about future measurements of the epoch of reionization and high-z galaxy formation. Along the way\, and given time\, I will discuss the status and progress of axion direct detection experiments. In particular\, CASPEr-Wind may be able to detect the axion responsible for solving the small-scale crises. \n\n16:00-17:00 in H331 (NIKHEF): \nSpeaker: Raphael Flauger (University of Texas\, Austin) \nTitle: On Tensions\, Systematics and B-modes
URL:https://cosmology.nl/event/amsterdam-december-2015/
LOCATION:NIKHEF\, Science Park 105\, Amsterdam\, 1098 XG
CATEGORIES:THC meeting
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