Discriminating between thermal and nonthermal cosmic relic neutrinos through an annual modulation at PTOLEMY
Discriminating between thermal and nonthermal cosmic relic neutrinos through an annual modulation at PTOLEMY
If massive neutrinos are Dirac particles, the proposed PTOLEMY experiment will hopefully be able to discover the cosmic neutrino background via ${\ensuremath{\nu}}_{e}+^{3}\mathrm{H}\ensuremath{\rightarrow}^{3}\mathrm{He}+{e}^{\ensuremath{-}}$ with a capture rate of ${\mathrm{\ensuremath{\Gamma}}}_{\mathrm{D}}\ensuremath{\approx}4\text{ }\text{ }{\mathrm{yr}}^{\ensuremath{-}1}$. Recently, it has been pointed out that right-handed components of Dirac neutrinos could also be copiously produced in the early …