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Publikováno v:
JHEP0808:057,2008
We study finite size effects for composite operators in the SU(2) sector of the superconformal beta-deformed N=4 SYM theory. In particular we concentrate on the spectrum of one single magnon. Since in this theory one-impurity states are non BPS we co
Externí odkaz:
http://arxiv.org/abs/0806.2103
Publikováno v:
Nucl.Phys.B805:231-266,2008
In this paper we give all the details of the calculation that we presented in our previous paper arXiv:0712.3522, concerning the four-loop anomalous dimension of the Konishi descendant tr(\phi Z\phi Z-\phi \phi Z Z) in the SU(2) sector of the N=4 pla
Externí odkaz:
http://arxiv.org/abs/0806.2095
Publikováno v:
Phys.Lett.B666:100-105,2008
We present the planar four-loop anomalous dimension of the composite operator tr(phi[Z,phi]Z) in the flavour SU(2) sector of the N=4 SYM theory. At this loop order wrapping interactions are present: they give rise to contributions proportional to zet
Externí odkaz:
http://arxiv.org/abs/0712.3522
Publikováno v:
JHEP 0404:028,2004
In this paper we discuss the contribution of planar diagrams to gravitational F-terms for N=1 supersymmetric gauge theories admitting a large N description. We show how the planar diagrams lead to a universal contribution at the extremum of the glueb
Externí odkaz:
http://arxiv.org/abs/hep-th/0310061
Publikováno v:
Phys.Lett.B573:138-146,2003
Using N=1 superspace techniques in four dimensions we show how to perturbatively compute the superpotential generated for the glueball superfield upon integrating out massive charged fields. The technique applies to arbitrary gauge groups and represe
Externí odkaz:
http://arxiv.org/abs/hep-th/0211017
Publikováno v:
Class.Quant.Grav. 19 (2002) 4029-4042
We deform two-dimensional topological gravity by making use of its gauge theory formulation. The obtained noncommutative gravity model is shown to be invariant under a class of transformations that reduce to standard diffeomorphisms once the noncommu
Externí odkaz:
http://arxiv.org/abs/hep-th/0203038
Publikováno v:
Phys.Lett. B536 (2002) 101-106
We present a Lorentzian version of three-dimensional noncommutative Einstein-AdS gravity by making use of the Chern-Simons formulation of pure gravity in 2+1 dimensions. The deformed action contains a real, symmetric metric and a real, antisymmetric
Externí odkaz:
http://arxiv.org/abs/hep-th/0201103
Publikováno v:
Fortsch.Phys. 50 (2002) 952-958
We discuss recent results on one-loop contributions to the effective action in {\cal N}=4 supersymmetric Yang-Mills theory in four dimensions. Contributions with five external vector fields are compared with corresponding ones in open superstring the
Externí odkaz:
http://arxiv.org/abs/hep-th/0201106