- #1

ndung200790

- 519

- 0

Inew=I0[[itex]\phi[/itex]]+s[itex]\psi[/itex][[itex]\phi[/itex],[itex]\omega[/itex],[itex]\varpi[/itex],h].

Where ω and [itex]\varpi[/itex] is ghost and anti ghost.

If we expand I in series of terms In that satisfy sIn=0(s is BRST operator(Slavnov operator)).

We introduce Hodge operator t=[itex]\varpi[/itex][itex]\delta[/itex]/[itex]\delta[/itex]h.Then

ψ=-∑tIn/n.

They conclude that ψ has ghost number is -1,but I do not understand why?