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- Lectures
- Institute of Physics
- Location
5F, 1st Meeting Room, Institute of Physics
- Speaker Name
Dr. Shouvik Roy Choudhury (Academia Sinica Institute of Astronomy and Astrophysics)
- State
Definitive
- Url
https://www.phys.sinica.edu.tw/lecture_detail.php?id=2816&eng=T
2023-12-15 11:00 - 13:00
【Abstract】
In the Lambda-CDM model, Planck data provides a value of the Hubble constant H0 equal to 67.5 km/s/Mpc, which is around 5-sigma away from the locally measured value from Type Ia Supernovae, H0 equal to 73 km/s/Mpc. This Hubble tension is currently the biggest discrepancy in cosmology. Here we looked at the cosmological model that incorporates massive neutrino non-standard interaction mediated via a heavy scalar, which had previously shown a lot of promise in solving the Hubble tension in the strong interaction regime where the coupling strength is approximately 10^9 times the weak interaction coupling. However, with the latest Planck 2018 data, we found that the Planck high-multipole CMB polarization data disfavours such strong interactions.
Based on: arXiv: 2012.07519 (published in JCAP)
