BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//UM//UM*Events//EN
CALSCALE:GREGORIAN
BEGIN:VTIMEZONE
TZID:America/Detroit
TZURL:http://tzurl.org/zoneinfo/America/Detroit
X-LIC-LOCATION:America/Detroit
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:20070311T020000
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:20071104T020000
RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:20260824T163759
DTSTART;TZID=America/Detroit:20260911T150000
DTEND;TZID=America/Detroit:20260911T160000
SUMMARY:Lecture / Discussion:HET Seminar | Phasing out Dark Matter Isocurvature with Thermal Misalignment
DESCRIPTION:Thermal misalignment provides an alternative to the standard misalignment mechanism for the cosmological production of scalar dark matter. In this framework\, feeble couplings to particles in the thermal bath generate a finite-temperature potential that drives the scalar towards large field values early in the radiation era\, dynamically inducing the misalignment before the onset of scalar oscillations. As a result\, the relic abundance is controlled primarily by particle masses and couplings rather than the initial field value. As a light spectator field\, the scalar acquires inflationary fluctuations that are uncorrelated with the adiabatic curvature mode\, generically sourcing isocurvature perturbations. We show that\, unlike standard misalignment\, where light scalars are strongly constrained by cosmic microwave background bounds on dark matter isocurvature for high-scale inflation\, thermal misalignment can naturally suppress the isocurvature signal. This occurs through a novel late-time phase offset between the background zero mode and the superhorizon perturbations\, which reduces the final dark matter density contrast. Thermal misalignment therefore provides a new and generic route to isocurvature-safe scalar dark matter.
UID:149985-21907765@events.umich.edu
URL:https://events.umich.edu/event/149985
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:lecture,Physics,Science,Seminar,High Energy Theory Seminar
LOCATION:West Hall - 340
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260825T092903
DTSTART;TZID=America/Detroit:20260925T150000
DTEND;TZID=America/Detroit:20260925T160000
SUMMARY:Lecture / Discussion:HET Seminar |
DESCRIPTION:tbd
UID:150863-21910327@events.umich.edu
URL:https://events.umich.edu/event/150863
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Talk,Science,Physics,Lecture,High Energy Theory Seminar
LOCATION:West Hall - 340
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260807T095615
DTSTART;TZID=America/Detroit:20261016T150000
DTEND;TZID=America/Detroit:20261016T160000
SUMMARY:Lecture / Discussion:HET Seminar | Cosmological Seed Magnetic Field from Inflation
DESCRIPTION:A cosmological magnetic field of nG strength on Mpc length scales could be the seed magnetic field needed to explain observed few microG large-scale galactic magnetic fields. I first briefly review the observational and theoretical motivations for such a seed field\, two galactic magnetic field amplification models\, and some non-inflationary seed field generation scenarios. I then discuss an inflation magnetic field generation model. I conclude by mentioning possible extensions of this model as well as potentially observable consequences.
UID:149986-21907766@events.umich.edu
URL:https://events.umich.edu/event/149986
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Seminar,Science,Physics,Natural Sciences,lecture,High Energy Theory Seminar
LOCATION:West Hall - 340
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260825T093241
DTSTART;TZID=America/Detroit:20261106T150000
DTEND;TZID=America/Detroit:20261106T160000
SUMMARY:Lecture / Discussion:HET Seminar |
DESCRIPTION:tbd
UID:150864-21910328@events.umich.edu
URL:https://events.umich.edu/event/150864
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:High Energy Theory Seminar,Physics,Science,Seminar
LOCATION:West Hall - 340
CONTACT:
END:VEVENT
END:VCALENDAR