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Ultraviolet divergences in maximal supergravity from a pure spinor point of view

Anna Karlsson (Institutionen för fundamental fysik)
Journal of High Energy Physics (1029-8479). 04, p. art. 165. (2014)
[Artikel, refereegranskad vetenskaplig]

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.

Denna post skapades 2014-12-20. Senast ändrad 2015-11-18.
CPL Pubid: 208797


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Institutioner (Chalmers)

Institutionen för fundamental fysik (2005-2015)


Matematisk fysik
Relativitetsteori, gravitation

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Off-shell, maximal supersymmetry & exceptional geometry