Universality of gauge thresholds in non-supersymmetric heterotic vacua

Article, Preprint OPEN
Angelantonj, Carlo ; Florakis, Ioannis ; Tsulaia, Mirian (2014)
  • Publisher: Elsevier BV
  • Journal: Physics Letters B, volume 736, pages 365-370 (issn: 0370-2693, eissn: 1873-2445)
  • Related identifiers: doi: 10.1016/j.physletb.2014.08.001
  • Subject: Physics | High Energy Physics - Theory | QC1-999 | Nuclear and High Energy Physics
    arxiv: High Energy Physics::Theory | High Energy Physics::Phenomenology

We compute one-loop threshold corrections to non-abelian gauge couplings in four-dimensional heterotic vacua with spontaneously broken $\cal N = 2 \to \cal N = 0$ supersymmetry, obtained as Scherk-Schwarz reductions of six-dimensional K3 compactifications. As expected, the gauge thresholds are no-longer BPS protected, and receive contributions also from the excitations of the RNS sector. Remarkably, the difference of thresholds for non-abelian gauge couplings is BPS saturated and exhibits a universal behaviour independently of the orbifold realisation of K3. Moreover, the thresholds and their difference develop infra-red logarithmic singularities whenever charged BPS-like states, originating from the twisted RNS sector, become massless at special loci in the classical moduli space.
  • References (33)
    33 references, page 1 of 4

    [1] R. Rohm, Spontaneous supersymmetry breaking in supersymmetric string theories, Nucl. Phys. B 237 (1984) 553.

    [2] C. Kounnas, M. Porrati, Spontaneous supersymmetry breaking in string theory, Nucl. Phys. B 310 (1988) 355.

    [3] S. Ferrara, C. Kounnas, M. Porrati, F. Zwirner, Superstrings with spontaneously broken supersymmetry and their effective theories, Nucl. Phys. B 318 (1989) 75.

    [4] C. Kounnas, B. Rostand, Coordinate dependent compactifications and discrete symmetries, Nucl. Phys. B 341 (1990) 641.

    [5] J. Scherk, J.H. Schwarz, Spontaneous breaking of supersymmetry through dimensional reduction, Phys. Lett. B 82 (1979) 60.

    [6] J. Scherk, J.H. Schwarz, How to get masses from extra dimensions, Nucl. Phys. B 153 (1979) 61.

    [7] J.J. Atick, E. Witten, The Hagedorn transition and the number of degrees of freedom of string theory, Nucl. Phys. B 310 (1988) 291.

    [8] C. Angelantonj, M. Cardella, N. Irges, An alternative for moduli stabilisation, Phys. Lett. B 641 (2006) 474, arXiv:hep-th/0608022.

    [9] C. Angelantonj, C. Kounnas, H. Partouche, N. Toumbas, Resolution of Hagedorn singularity in superstrings with gravito-magnetic fluxes, Nucl. Phys. B 809 (2009) 291, arXiv:0808.1357 [hep-th].

    [10] I. Florakis, C. Kounnas, N. Toumbas, Marginal deformations of vacua with massive boson-fermion degeneracy symmetry, Nucl. Phys. B 834 (2010) 273, arXiv:1002.2427 [hep-th].

  • Similar Research Results (1)
  • Metrics
    No metrics available
Share - Bookmark