Description |
The 5 sigma mismatch between CMB and local distance ladder measurements of Hubble parameter is one of the greatest challenge to our well known Lambda CDM model of cosmology. I will discuss that we definitely need beyond standard model particle physics to appear before CMB epoch if the anomaly persists. I will also discuss how secret dark matter decay or secret neutrino interaction can play a crucial role around CMB epoch to alleviate this recent problem in cosmology. |
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