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NPAC (Nuclear/Particle/Astro/Cosmo) Forums

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Organized by: Prof. Kimberley Palladino


Event Number 4747

  Thursday, February 22nd, 2018

Where is all the antimatter?
Time: 3:30 pm
Place: 4274 Chamberlin Hall
Speaker: Nuno Barros, University of Pennsylvania
Abstract: Everything we know about the microscopic world tells us that the universe should be composed of equal parts matter and antimatter. All known particle interactions and decays always produce equal amount of each.
Yet all the known, observable, universe is composed solely of matter, suggesting that a small surplus of matter might have taken form shortly after the Big Bang.
A possible explanation for this asymmetry may be that neutrinos, unlike all other fundamental particles of Nature, may have behavior that distinguishes matter and antimatter. Ironically, the property that allows this is that neutrinos
and antineutrinos may be the same thing. Many experiments worldwide that are running or under construction, are investigating this possibility.
This talk will discuss this problem and the different approaches to address it in both present and upcoming neutrino
experiments, with particular emphasis on long baseline neutrino oscillations with DUNE and neutrinoless double beta decay with SNO+. The physics goals and expectations of these experiments will also be discussed.
Host: Sridhara Dasu
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