ECHo-1k's 163Ho calorimetric spectrum yields m_nu_e < 15 eV/c^2 (90% credible interval), a factor of 1.8 improvement over the HOLMES limit.
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Improved limit on the effective electron neutrino mass with the ECHo-1k experiment
ECHo-1k's 163Ho calorimetric spectrum yields m_nu_e < 15 eV/c^2 (90% credible interval), a factor of 1.8 improvement over the HOLMES limit.