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Cosmological Hubble anomaly and its possible connection to dark matter or neutrino physics
The Hubble anomaly between the lambda-CDM-model dependent prediction of the current expansion rate H0 using Planck data and direct, model-independent measurements in the local universe from the SH0ES collaboration disagree at 3 sigma;. Moreover, there exists a milder ~ 2 sigma; tension between similar predictions for the amplitude S8 of matter fluctuations and its measurement in the local universe. As explanations relying on unresolved systematics have not been found, theorists have been exploring explanations for these anomalies that modify the cosmological model, altering early-universe-based predictions for these parameters. I will discus two scenarios where nw physics at CMB scale through dark matter decay or neutrino driven phase transition play a crucial role to resolve this anomaly.