# Resolution of Hagedorn singularity in superstrings with gravito-magnetic fluxes - High Energy Physics - Theory

Resolution of Hagedorn singularity in superstrings with gravito-magnetic fluxes - High Energy Physics - Theory - Download this document for free, or read online. Document in PDF available to download.

Abstract: We consider closed type II and orientifold backgrounds where supersymmetry isspontaneously broken by asymmetric geometrical fluxes. We show that these canbe used to describe thermal ensembles with chemical potentials associated to-gravito-magnetic- fluxes. The thermal free energy is computed at the one-loopstring level, and it is shown to be free of the usual Hagedorn-likeinstabilities for a certain choice of the chemical potentials. In the closedstring gravitational sector, as well as in the open string matter sector of theproposed orientifold construction, the free energy turns out to have-Temperature duality- symmetry, ${\cal F}T-T H={T^2\over T H^2} {\calF}T H-T$, which requires interchanging the space-time spinor representations$S\leftrightarrow C$. For small temperatures, $T\to 0$, the anti-spinor $C$decouples from the spectrum while for large temperatures, $T\to \infty$, thespinor $S$ decouples. In both limits the free energy vanishes, as we recover aconventional type II superstring theory. At the self dual point $T=T H$, thethermal spectra of $S$ and $C$ are identical. Moreover, there are extramassless scalars in the adjoint representation of an SO4 non-abelian gaugesymmetry in the closed-string sector, and open-string massless states chargedsimultaneously under both the Chan-Paton and the closed-string SO4 gaugegroup.

Author: ** C. Angelantonj, C. Kounnas, H. Partouche, N. Toumbas**

Source: https://arxiv.org/