Results 11 to 20 of about 2,664,445 (176)
Refined topological amplitudes from the Ω-background in string theory
Journal of High Energy Physics, 2022 It was recently shown that the N $$ \mathcal{N} $$ = 2 string topological amplitudes in the heterotic weak coupling limit generate a six-dimensional Melvin space, providing a description of the Ω-background in string theory, where string propagation can ...
Carlo Angelantonj +3 more
doaj +1 more source
Homotopy Transfer and Effective Field Theory II: Strings and Double Field Theory
Fortschritte der Physik, Volume 70, Issue 2-3, March 2022., 2022 Abstract We continue our study of effective field theory via homotopy transfer of L∞$L_\infty$‐algebras, and apply it to tree‐level non‐Wilsonian effective actions of the kind discussed by Sen in which the modes integrated out are comparable in mass to the modes that are kept. We focus on the construction of effective actions for string states at fixed
Alex S. Arvanitakis +3 more
wiley +1 more source
Quantization of heterotic strings in a Goedel/Anti de Sitter spacetime and chronology protection [PDF]
, 2003 We show that a Godel-like deformation of AdS3 in heterotic string theory can be realized as an exact string background. Indeed this class of solutions is obtained as an exactly marginal deformation of the worldsheet conformal field theory describing the ...
D. Israel
semanticscholar +1 more source
The anomaly that was not meant IIB
Fortschritte der Physik, Volume 70, Issue 1, January 2022., 2022 Abstract Type IIB supergravity enjoys a discrete non‐Abelian duality group, which has potential quantum anomalies. In this paper we explicitly compute these, and present the bordism group that controls them, modulo some physically motivated assumptions.
Arun Debray +3 more
wiley +1 more source
Toroidal & Orbifold Compactifications at Large D and D‐Duality
Fortschritte der Physik, Volume 70, Issue 1, January 2022., 2022 Abstract In this paper I will further investigate the spectrum of quantum gravity or string theories at large number of dimensions. We will see that volumes of certain orbifolds shrink at large D. It follows that the mass spectra of the leading Kaluza‐Klein towers and also of wrapped brane states on these orbifolds possess a non‐trivial dependence on D:
Dieter Lüst
wiley +1 more source
String (Gravi)photons, “Dark Brane Photons”, Holography and the Hypercharge Portal
Fortschritte der Physik, Volume 69, Issue 6, June 2021., 2021 Abstract The mixing of graviphotons and dark brane photons to the Standard Model hypercharge is analyzed in full generality, in weakly‐coupled string theory. Both the direct mixing as well as effective terms that provide mixing after inclusion of SM corrections are estimated to lowest order.
P. Anastasopoulos +3 more
wiley +1 more source
Normal form of nilpotent vector field near the tip of the pure spinor cone
Journal of High Energy Physics, 2021 Pure spinor formalism implies that supergravity equations in space-time are equivalent to the requirement that the worldsheet sigma-model satisfies certain properties.
Andrei Mikhailov, Dennis Zavaleta
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Superstring Backgrounds in String Geometry
Advances in High Energy Physics, Volume 2021, Issue 1, 2021., 2021 String geometry theory is a candidate of the nonperturbative formulation of string theory. In order to determine the string vacuum, we need to clarify how superstring backgrounds are described in string geometry theory. In this paper, we show that all the type IIA, IIB, SO(32) type I, and SO(32) and E8 × E8 heterotic superstring backgrounds are ...
Masaki Honda +3 more
wiley +1 more source
Manifest spacetime supersymmetry and the superstring
Journal of High Energy Physics, 2021 The algebra of spacetime supersymmetry generators in the RNS formalism for the superstring closes only up to a picture-changing operation. After adding non-minimal variables and working in the “large” Hilbert space, the algebra closes without picture ...
Nathan Berkovits
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Superspaces for heterotic pure spinor string compactifications [PDF]
, 2022 We study supersymmetry conditions for the heterotic pure superstring preserving and N=1 supersymmetry in four dimensions directly from the curved superspace defined by the Berkovits-Howe constraints.
arxiv +1 more source