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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:6
UID:UW-Physics-Event-8100
DTSTART:20231006T203000Z
DTEND:20231006T220000Z
DTSTAMP:20260414T051818Z
LAST-MODIFIED:20230929T145551Z
LOCATION:Chamberlin 2241
SUMMARY:Neutrino Tomography: A journey into the interior of Earth\, Ph
 ysics Department Colloquium\, Sanjib Kumar Agarwalla \, Institute of P
 hysics\, Bhubaneswar\, India and Physics Department and WIPAC\, Univer
 sity of Wisconsin-Madison
DESCRIPTION:Neutrinos produced in cosmic ray interactions in the atmos
 phere provide a unique and independent probe to explore the internal s
 tructure and composition of the deep Earth\, which is complementary to
  traditional seismic and gravitational measurements and pave the way f
 or multi-messenger tomography of Earth. I will discuss the two differe
 nt approaches to perform Earth tomography with neutrinos: (i) neutrino
  absorption tomography\, based on partial absorption of a high-energy 
 TeV-PeV neutrino flux as it propagates through Earth and (ii) neutrino
  oscillation tomography\, based on Earth matter effects due to the coh
 erent forward scattering of multi-GeV neutrinos with the ambient elect
 rons modifying neutrino oscillation patterns. I will subsequently show
  how well the DeepCore detector\, a densely instrumented sub-array of 
 the IceCube neutrino observatory at the South Pole\, can observe these
  Earth matter effects in atmospheric neutrino oscillations using 9.3 y
 ears of data. We will further demonstrate that these matter effects in
  oscillations of atmospheric neutrinos can be used to establish the la
 yered structure inside Earth and measure the mass of Earth and mass of
  core. I will conclude my talk discussing the remarkable physics reach
  of a new extension of DeepCore to be deployed in the Antarctic summer
  2025/26\, called the IceCube Upgrade.
URL:https://www.physics.wisc.edu/events/?id=8100
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