Description
https://pitt.zoom.us/j/96734791723
Cosmology experiments are often based on large-scale surveys on satellite and need methods to perform in-flight relative flux self-calibrations of their spectro-photometer instruments. In this talk a method is proposed where the instrument response function is inferred with a chi square statistics in an unbiased way, simulating a simplified sequence of observations with realistic distributions...
Based on: JCAP 03 (2021) 084 (arXiv: 2012.07519)
We have updated the constraints on flavor universal neutrino self-interactions mediated by a heavy scalar, in the effective 4-fermion interaction limit. Based on the latest CMB temperature data from the Planck 2018 data release as well as auxiliary data we confirm the presence of a region in parameter space with relatively strong...
In string theory picture, Planck scale $M_{\rm Pl}$, the supersymmetry-breaking scale $m_s$, electroweak scale $m_{\rm EW}$ and vacuum energy density (cosmological constant) $\Lambda$ are to be dynamically determined from string scale $M_S$. Here we consider a model that links the supersymmetric electroweak phenomenology to string theory motivated flux compactification approach. The model...
The worldline effective field theory formalism provides a systematic approach to probe the post-Minkowskian binary scattering processes. Expanding to include spin degrees of freedom, we compute the total change in momentum and spin in the gravitational scattering of compact objects to next-to-leading PM order with linear and bilinear spin effects and arbitrary initial conditions. Using the...
The $\Lambda$CDM model provides an excellent fit to the CMB data. However, a statistically significant tension emerges when its determination of the Hubble constant $H_0$ is compared to the local distance-redshift measurements. The axi-Higgs model, which couples ultralight axions to the Higgs field, offers a specific variation of the $\Lambda$CDM model. It relaxes the $H_0$ tension as well as...
