Light scalar from deformations of the Klebanov-Strassler background

Daniel Elander
Phys. Rev. D 91, 126012 – Published 23 June 2015

Abstract

We study deformations of the Klebanov-Strassler background parametrized by the size of a dim-6 VEV. In the UV, these solutions describe the usual duality cascade of Klebanov-Strassler; however, below the scale ρ* set by the dim-6 VEV they exhibit hyperscaling violation over a range of the radial coordinate. Focusing on the spectrum of scalar glueballs, we find a parametrically light state, the mass of which is suppressed by ρ*, becoming massless in the limit of ρ*. Along the way, we clarify the choice of IR and UV boundary conditions for the fluctuations in the bulk, and find agreement with previous calculations for the spectrum of Klebanov-Strassler.

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  • Received 19 January 2015

DOI:https://doi.org/10.1103/PhysRevD.91.126012

© 2015 American Physical Society

Authors & Affiliations

Daniel Elander

  • Department of Physics and Astronomy, Purdue University, 525 Northwestern Avenue, West Lafayette, Indiana 47907-2036, USA

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Issue

Vol. 91, Iss. 12 — 15 June 2015

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