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Events During the Week of February 26th through March 5th, 2023

Monday, February 27th, 2023

No events scheduled

Tuesday, February 28th, 2023

No events scheduled

Wednesday, March 1st, 2023

Theory Seminar (High Energy/Cosmology)
Title to be announced
Time: 1:00 pm
Place: Chamberlin 5280
Host: George Wojcik
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Thursday, March 2nd, 2023

NPAC (Nuclear/Particle/Astro/Cosmo) Forum
Where are Milky Way’s Hadronic PeVatrons?
Time: 2:30 pm
Place: Chamberlin 4274
Speaker: Takahiro Sudo, Ohio State University
Abstract: Observations of the Milky Way at TeV–PeV energies reveal a bright diffuse flux of hadronic cosmic rays and also bright point sources of gamma rays. If the gamma-ray sources are hadronic cosmic-ray accelerators, then they must also be neutrino sources. However, no neutrino sources have been detected. Where are they? We introduce a new population-based approach to probe Milky Way hadronic PeVatrons, demanding consistency between diffuse and point-source PeV-range data on cosmic rays, gamma rays, and neutrinos. For the PeVatrons, two extreme scenarios are allowed: (1) the hadronic cosmic-ray accelerators and the gamma-ray sources are the same objects, so that bright neutrino sources exist and improved telescopes can detect them, versus (2) the hadronic cosmic-ray accelerators and the gamma-ray sources are distinct, so that there are no detectable neutrino sources. The latter case is possible if hadronic accelerators have sufficiently thin column densities. We quantify present constraints and future prospects, showing how to reveal the nature of the hadronic PeVatrons
Host: Lu Lu
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Friday, March 3rd, 2023

Physics Department Colloquium
Compact Linear Accelerators for Ultrabright Light Sources and the Cool Copper Collider
Time: 3:30 pm
Place: 2241 Chamberlin Hall
Speaker: Emilio Nanni, SLAC, Stanford University
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