Martedì 10 Marzo 2015 15.30 - Seminario Teorico - Paolo Di Vecchia - Low-energy behavior of gluons and gravitons from gauge invariance
Relatore: Prof. Paolo Di Vecchia - Nordita, Stockholm
Luogo: Sala Feynman
E-mail organizzatore: marisa.bonini@fis.unipr.it
Abstract:
We show that at tree level, on-shell gauge invariance can be used to fully determine the first subleading soft-gluon behavior
and the first two subleading soft-graviton behaviors. Our proofs of the behaviors for n-gluon and n-graviton tree amplitudes
are valid in D dimensions and are similar to Low’s proof of universality of the first subleading behavior of photons. We discuss
how these behaviors are modified by the loop corrections.
Finally, we study these soft behaviors in the bosonic string and we extend them to the dilation and the Kalb-Ramond antisymmetric tensor.