Network in Neutrinos, Nuclear Astrophysics, and Symmetries (N3AS) Seminars |
Events on Tuesday, July 27th, 2021
- TBD
- Time: 2:00 pm
- Place:
- Speaker: Nirmal Raj, TRIUMF
- Abstract: TBD
- Host: Baha Balantekin
- Dark Neutrons: Cosmology and New Astrophysical Signatures
- Time: 2:00 pm
- Place:
- Speaker: Nirmal Raj, TRIUMF, Canada
- Abstract: New states that mix with the neutron, such as dark baryons and mirror neutrons, have been proposed to address dark matter, baryogenesis, the long-standing neutron lifetime anomaly, and the recent XENON1T excess. I show that such states are extensively probed by (1) Big Bang nucleosynthesis, (2) cosmic microwave background spectra, (3) stability of nuclides in low-metallicity stars, (4) a novel mechanism to heat neutron stars by tapping the energy stored in their Fermi seas. This latter effect already constrains a vast range of parameter space, and provides a powerful motivation for imminent optical, ultraviolet and infrared astronomical missions, namely, of directly probing the properties of the neutron. Talk based on 2012.09865 & 2105.09951.
- Host: Baha Balantekin