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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:2
UID:UW-Physics-Event-8277
DTSTART:20230518T153000Z
DTEND:20230518T173000Z
DTSTAMP:20260414T033341Z
LAST-MODIFIED:20230515T184834Z
LOCATION:5280 Chamberlin
SUMMARY:Macroscopic Dark Matter\, Graduate Program Event\, Mrunal Pras
 hant Korwar\, Department of Physics Graduate Student
DESCRIPTION:The notion of macroscopic dark matter\, made up of multipl
 e constituent particles\, provides an intriguing possibility to explai
 n the nature of dark matter. In this thesis\, we present theoretical m
 odels\, formation mechanisms in the early universe\, and experimental 
 search strategies for macroscopic dark matter. For the model aspect\, 
 we explore two examples: the electroweak symmetric dark monopole\, in 
 which the Higgs-portal interaction alters the electroweak vacuum withi
 n the monopole\, and primordial black holes of both magnetically charg
 ed and uncharged types. While both uncharged black holes and magnetic 
 black holes undergo Hawking evaporation\, for the latter\, the presenc
 e of hairy electroweak-symmetric coronas accelerates the Hawking evapo
 ration\, making the magnetic black holes extremal. For the formation m
 echanism\, we propose a new production method for monopoles through pa
 rametric resonance. We demonstrate that dark monopoles with a radius u
 p to one micron and a mass of up to ten kilotons could account for all
  dark matter. To search for macroscopic dark matter objects\, we find 
 that monopoles with electroweak-symmetric cores generate multi-hit sig
 natures and deposit significant energy in large-volume neutrino detect
 ors\, such as the IceCube neutrino detector\, which can probe dark mat
 ter masses up to one gram. For uncharged primordial black holes\, we u
 pdate constraints from Hawking evaporation using observations of gamma
 -ray emissions and identify new targets for future exploration. We als
 o discuss potential detection signatures for extremal magnetic black h
 oles.
URL:https://www.physics.wisc.edu/events/?id=8277
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