Towards probing diffuse supernova background in all flavors

by Dr Anna M. Suliga (University of Madison)

Wednesday 23 Feb 2022, 10:00 → 12:00 Asia/Shanghai

Tsung-Dao Lee library/Fourth Floor-410 - 410# Meeting Room (Tsung-Dao Lee Library)

Abstract：

To fully understand the whole core-collapse supernova population, it is essential to observe neutrinos from multiple supernovae events – the diffuse supernova neutrino background (DSNB). The Super-Kamiokande (SK) detector achieved the most stringent upper limit on the electron antineutrino component of the DSNB. This limit is only a factor of 2-3 above most of the theoretical predictions. In addition, SK is now enriched with gadolinium which will help to reduce backgrounds for the DSNB search and most probably lead to the detection within the near future. The electron neutrino component of the DSNB has a ten times weaker upper limit than the electron antineutrino component. With the upcoming Deep Underground Neutrino Experiment (DUNE), the limit may change into observation. But capturing the complete picture of the core-collapse supernova landscape and investigating new astrophysics or physics requires probing DSNB in all flavors. The upper limits on the non-electron component of the DSNB (muon and tau neutrinos and antineutrinos) are ~ a thousand times weaker than the theoretical predictions. In this talk, I will present how the large-scale direct dark matter detectors can help significantly tighten the upper limits on the non-electron component of DSNB. In addition, I will talk about plausible beyond the Standard Model scenarios, which could alter the non-electron neutrino emission from the core-collapse supernovae.

Biography：

I’m a postdoctoral fellow with the Network for Neutrinos, Nuclear Astrophysics and Symmetries (N3AS) Physics Frontier Center, based at UC Berkeley. I’m currently based at the University of Madison, working with prof. Baha Balantekin. My research is focused on investigating the role of neutrinos in stars and constraining astrophysical parameters and new physics with the neutrino signal from those sources.

I completed my PhD at the Niels Bohr Institute of the University of Copenhagen in fall 2021, working on neutrino astrophysics. I got my master’s degree in Physics at the University of Copenhagen in July 2018. My thesis was focused on the diffuse supernova neutrino background. In 2016, I obtained an engineering degree in Technical Physics at the AGH University of Science and Technology in Krakow.

Online Meeting Room：https://cern.zoom.us/j/69681839681?pwd=Q1E3UFNPOVJ0TGQzSWF5SVAxclh6QT09

Meeting ID: 696 8183 9681
Passcode: 829763

Suliga.pdf