  The cross section for neutrino helicity spin-flip obtained from a new f(R, T)
model of gravitation with dynamic torsion field introduced by one of the
authors in [1], is phenomenologically analyzed. To this end, due to the
logarithmical energy dependence of the cross section, the relation with the
axion decay constant fa (Peccei-Quinn parameter) is used. Consequently the link
with the phenomenological energy/mass window is found from the astrophysical
and high energy viewpoints. The highest helicity spin-flip cross-sectional
values presented in this work coincide with a recent estimation on the axion
mass computed in [2] in the framework of finite temperature extended lattice
QCD and under cosmological considerations.
