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June 22, 2020 to July 2, 2020
US/Central timezone

Forecast on lepton asymmetry from future CMB experiments

Not scheduled
10m

Speaker

Mr Alexander Bonilla Rivera (UFJF)

Description

We consider a cosmological lepton asymmetry in the form of neutrinos and impose new expected sensitivities on such asymmetry through the degeneracy parameter ($\xi_{\nu}$) by using some future CMB experiment configurations, such as CORE and CMB-S4. Taking the default scenario with three neutrino states, we find $\xi _{\mu } = 0.05 \pm 0.10 \, (\pm \, 0.04)$, from CORE (CMB-S4) at 95 per cent CL, respectively. Also, within this scenario, we evaluate the neutrino mass scale, obtaining that the normal hierarchy mass scheme is privileged. Our results are an update concerning on the cosmological lepton asymmetry and the neutrino mass scale within this context, from which can bring a perspective on the null hypothesis for $\xi_{\nu}$ (and its effects on $\Delta N_{eff}$), where perhaps, $\xi_{\nu}$ may take a non-null value up to 95 per cent CL from future experiments such as CMB-S4.

Mini-abstract

Our results are an update concerning on the cosmological lepton asymmetry and the neutrino mass.

Primary author

Co-authors

Presentation Materials