An earlier prediction of a cosmic ray neutron line right at the energy of the
knee of the cosmic ray spectrum was based on the speculation that the electron
neutrino is a tachyon whose mass is reciprocally related to the energy of the
knee, Ek. Given the large uncertainty in Ek, the values of mν2
corresponding to it are consistent with values recently reported in tritium
beta decay experiments.Comment: Published as Phys. Lett. B 493 (2000) 1-