Ultraviolet divergences in maximal supergravity from a pure spinor point of view
Artikel i vetenskaplig tidskrift, 2014

The ultraviolet divergences of amplitude diagrams in maximal supergravity are investigated using the pure spinor superfield formalism in maximal supergravity, with maximally supersymmetric Yang-Mills theory for reference. We comment on the effects of the loop regularisation in relation to the actual absence of high powers (within the degrees of freedom) of the non-minimal variable r. The absence affects previous results of the field theory description, which is examined more closely (with a new b-ghost) with respect to the limit on the dimension for finiteness of the theory, dependent on the number of loops present. The results imply a cut-off of the loop dependence at six loops for the 4-point amplitude, and at seven loops otherwise.

Författare

Anna Karlsson

Chalmers, Fundamental fysik

Journal of High Energy Physics

1126-6708 (ISSN) 1029-8479 (eISSN)

art. 165-

Fundament

Grundläggande vetenskaper

Ämneskategorier

Annan fysik

DOI

10.1007/JHEP04(2015)165