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Measures of non-Gaussianity in axion-string-induced CMB birefringence [PDF]
Journal of Cosmology and Astroparticle Physics, 2023 The presence of axion strings in the Universe after recombination can leave an imprint on the polarization pattern of the cosmic microwave background radiation through the phenomenon of axion-string-induced birefringence via the hyperlight axion-like ...
Ray Hagimoto, A. J. Long
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Superradiance in string theory [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 We perform an extensive analysis of the statistics of axion masses and interactions in compactifications of type IIB string theory, and we show that black hole superradiance excludes some regions of Calabi-Yau moduli space. Regardless of the cosmological
V. Mehta +5 more
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Strings, gravity and particle physics [PDF]
, 2004 LaTeX, 28 pages, 13 figures. Contribution to the proceedings of the 2002 Rencontres de Moriond "Electroweak interactions and unified theories"
SAGNOTTI, AUGUSTO, SEVRIN A.
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Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A ∗ [PDF]
Classical and quantum gravity, 2022 Horizon-scale images of black holes (BHs) and their shadows have opened an unprecedented window onto tests of gravity and fundamental physics in the strong-field regime.
S. Vagnozzi +3 more
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Tensionless Strings from Worldsheet Symmetries [PDF]
, 2015 We revisit the construction of the tensionless limit of closed bosonic string theory in the covariant formulation in the light of Galilean conformal symmetry that rises as the residual gauge symmetry on the tensionless worldsheet.
Bagchi, Arjun +2 more
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On the black hole/string transition [PDF]
Journal of High Energy Physics, 2021 We discuss aspects of the possible transition between small black holes and highly excited fundamental strings. We focus on the connection between black holes and the self gravitating string solution of Horowitz and Polchinski.
Yiming Chen, J. Maldacena, E. Witten
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Conformally invariant off-shell string physics. [PDF]
Physical Review Letters, 1992 Using recent advances in the understanding of noncritical strings, we construct a unique, conformally invariant continuation to off-shell moment a of Polyakov amplitudes in critical string theory. Three-point amplitudes are explicitly calculated.
Myers, Periwal
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String condensations in $3+1D$ and Lagrangian algebras [PDF]
Advances in Theoretical and Mathematical Physics, 2022 We present three Lagrangian algebras in the modular 2-category associated to the 3+1D $\mathbb{Z}_2$ topological order and discuss their physical interpretations, connecting algebras with gapped boundary conditions, and interestingly, maps (braided ...
Jiaheng Zhao +5 more
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Small cosmological constants in string theory [PDF]
Journal of High Energy Physics, 2021 We construct supersymmetric AdS4 vacua of type IIB string theory in compactifications on orientifolds of Calabi-Yau threefold hypersurfaces. We first find explicit orientifolds and quantized fluxes for which the superpotential takes the form proposed by ...
M. Demirtaş +4 more
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PHYSICAL STATES AND STRING SYMMETRIES [PDF]
Modern Physics Letters A, 1995 It is shown that if the momenta belong to an integral lattice, then every physical state of string theory leads to a symmetry of the scattering amplitudes. We discuss the role of this symmetry when the momenta are those provided by the usual D.D.F construction and show that the string compactified on the torus associated with the self-dual Lorentzian ...
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