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

Direct comparison of sterile neutrino constraints from cosmological data, electron neutrino disappearance data and muon neutrino to electron neutrino appearance data in a 3+1 model

Not scheduled
10m

Speakers

Prof. Justin Evans (University of Manchester) Dr Pawel Guzowski (University of Manchester) Prof. Stefan Soldner-Rembold (University of Manchester)

Description

We present a quantitative comparison of constraints on sterile neutrinos from neutrino oscillation experiments and from Planck data. We find that the cosmological data fully exclude the allowed regions from the LSND, MiniBooNE and Neutrino-4 collaborations, and those from the gallium and rector anomalies, at the 95% CL. Compared to the exclusion region from the Daya Bay $\nu_{e}$-disappearance search, the Planck data are more strongly excluding above $|\Delta m^{2}_{41}|\approx 0.1\,\mathrm{eV}^{2}$ and $m_\mathrm{eff}^\mathrm{sterile}\approx 0.2\,\mathrm{eV}$, with the Daya Bay exclusion stronger below this. Compared to the combined Daya Bay/Bugey/MINOS exclusion region on $\nu_{\mu}\rightarrow\nu_{e}$ appearance, the Planck data is more strongly excluding above $\Delta m^{2}_{41}\approx 5\times 10^{-2}\,\mathrm{eV}^{2}$, with the exclusion strengths becoming comparable below this.

Mini-abstract

We compare sterile neutrino limits from the CMB to those from neutrino oscillation experiments.

Primary author

Prof. Justin Evans (University of Manchester)

Co-authors

Dr Pawel Guzowski (University of Manchester) Prof. Stefan Soldner-Rembold (University of Manchester)

Presentation Materials