Recent content by bankcheggit6

I'm interested in the following action for a relativistic point particle of mass m: S = \int d\tau (e^{-1}\dot{x}^2 - em^2) where e = e(\tau) is an einbein along the particle's world-line. If we reparametrize the world-line according to \tau \to \overline{\tau}(\tau) = \tau + \xi(\tau)...