Considering the background of masslessneutrino, probes into the effect of the background field on the gravitational field of a global cosmic string outside the core.
考虑静质量为零的中微子背景，探讨背景场对整体宇宙弦核外引力场的影响。
2
In the Fermi weak interaction theory and even in the electro-weak unification theory, the neutrino is looked as the massless particle.