YOUNGST@RS - Feebly Interacting Sectors Impact on Cosmology & Astrophysics

Session

Stars and Supernovae

1 Mar 2022, 16:00

Mainz Institute for Theoretical Physics, Johannes Gutenberg University

1. Stars as Particle-Physics Laboratories: Old Ideas and New Developments

Georg Raffelt

01/03/2022, 16:00

The hot and dense interiors of stars are powerful factories for
low-mass particles such as neutrinos or the hypothetical axions and axion-like particles, dark photons, fuzzy-dark-matter-particles, and others. The back-reaction on stars or searching for the particle fluxes or decay products provides some of the most restrictive limits, but also future detection opportunities. While many of...

21. Supernova Lessons from the Weakly Interacting Universe

Irene Tamborra

01/03/2022, 16:40

Neutrinos are key particles in the core collapse of massive stars, crucially affecting the supernova inner workings. In addition, non-standard feebly interacting particles may be abundantly produced in the hot and dense supernova core, making the latter a unique laboratory to explore physic beyond the Standard Model. Fascinating recent developments on the physics of neutrinos and other weakly...

20. Axion-Electron coupling from the RGB tip after the GAIA early-data-release 3

Oscar Straniero

01/03/2022, 17:20

Globular Clusters (GC) are building blocks of any kind of galaxy. The Milky Way hosts hundreds of GCs, preferentially located in the galactic halo and bulge. A typical GC contains about 10^6 almost coeval stars, as old as \sim 13 Gyr. In the more advanced phase of the evolution, i.e., stars found in the RGB, HB, AGB and WD cooling sequence, stellar interiors are hot enough for the activation...

24. Constraining pseudo-Dirac neutrinos from a future galactic supernova

Manibrata Sen

01/03/2022, 18:30

Ever since the discovery of neutrinos, we have wondered if neutrinos are their own antiparticles. One remarkable possibility is that neutrinos have a pseudo-Dirac nature, predicting a tiny mass difference between active and sterile states, with oscillations driven by this tiny mass difference. Such oscillations can only be visible over very long distances. In this talk, I will discuss how...

25. Indication of a Pulsar Wind Nebula in SN 1987A

Emanuele Greco

01/03/2022, 18:50

Since the day of its explosion, SN 1987A was closely monitored with the aim to study its evolution and to detect its central compact relic. The detection of neutrinos from the supernova strongly supports the formation of a neutron star (NS). However, the constant and fruitless search for this object has led to different hypotheses on its nature. To date, the detection in the Atacama Large...

26. Towards probing the diffuse supernova neutrino background in all flavors

Anna Suliga

01/03/2022, 19:10

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...