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SEQUENCE:1
UID:UW-Physics-Event-7971
DTSTART:20221101T200000Z
DTEND:20221101T230000Z
DTSTAMP:20260414T153418Z
LAST-MODIFIED:20221031T151931Z
LOCATION:4274 Chamberlin or https://uwmadison.zoom.us/j/91653980229?pw
 d=VFNNWTMrZS9VcWYydFVsb1FpL1ExUT09
SUMMARY:Astophysical Neutrino Source Searches Using IceCube Starting T
 racks\, Thesis Defense\, Sarah Mancina\, Physics Graduate Student
DESCRIPTION:The IceCube detector is an array of optical light detector
 s embedded deep in the South Pole ice that aims to discover the origin
 s of astrophysical neutrinos. Due to the detector's location\, the sou
 thern equatorial sky astrophysical neutrino signal lies under a large 
 background of muons generated in cosmic ray interactions in the atmosp
 here. Therefore\, IceCube’s sensitivity to astrophysical neutrino so
 urces has always been stronger in the northern sky\, where the main ba
 ckground is atmospheric neutrinos created by cosmic ray air showers.Th
 e research presented here focuses on improving IceCube’s sensitivity
  to southern sky sources by selecting for starting tracks\, which are 
 created by muon neutrinos that interact inside of the IceCube detector
  volume. By selecting for starting tracks\, we not only reduce the atm
 ospheric muon background but also the atmospheric neutrino background\
 , allowing for a high purity sample of astrophysical neutrinos in the 
 southern sky. The starting tracks were used to perform four types of s
 earches for astrophysical neutrino sources: a whole sky neutrino sourc
 e search\, an individual source search with locations from bright gamm
 a ray objects\, a stacked source search which looks for a signal from 
 multiple sources of the same type\, and a galactic plane template sear
 ch which looks for neutrinos created in the galactic plane medium. All
  searches were unable to significantly detect an astrophysical neutrin
 o source\, but the starting track selection technique could be used in
  tandem with other selections to discover galactic sources of neutrino
 s in the future.
URL:https://www.physics.wisc.edu/events/?id=7971
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