On the consistency of the N=1 SYM spectra from wrapped five-branes

Details On the consistency of the N=1 SYM spectra from wrapped five-branes On the consistency of the N=1 SYM spectra from wrapped five-branes

2003-05-09

arxiv.org/abs/hep-th/0305075v1

Nucl.Phys.B674:231-258,2003

Physics

High Energy Physics

High Energy Physics - Theory

30 pages, latex

Scientific paper

10.1016/j.nuclphysb.2003.09.042

We discuss the existence of glueball states for N=1 SYM within the Maldacena-Nunez model. We find that for this model the existence of an area law in the Wilson loop operator does not imply the existence of a discrete glueball spectrum. We suggest that implementing the model with an upper hard cut-off can amend the lack of spectrum. As a result the model can be only interpreted in the infra-red region. A direct comparison with the lattice data allows us to fix the scale up to where the model is sensible to describe low-energy observables. Nevertheless, taking for granted the lattice results, the resulting spectrum does not follow the general trends found in other supergravity backgrounds. We further discuss the decoupling of the non-singlet Kaluza-Klein states by analysing the associated supergravity equation of motion. The inclusion of non-commutative effects is also analysed and we find that leads to an enhancement on the value of the masses.

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