Effective action and tension renormalization for cosmic and fundamental strings

Alessandra Buonanno, Thibault Damour
1998 Physics Letters B  
We derive the effective action for classical strings coupled to dilatonic, gravitational, and axionic fields. We show how to use this effective action for: (i) renormalizing the string tension, (ii) linking ultraviolet divergences to the infrared (long-range) interaction between strings, (iii) bringing additional light on the special cancellations that occur for fundamental strings, and (iv) pointing out the limitations of Dirac's celebrated field-energy approach to renormalization.
doi:10.1016/s0370-2693(98)00609-1 fatcat:n54w74vxurbcxf5hvimnczenby