Results 41 to 50 of about 462 (74)

Heterotic instantons for monad and extension bundles

Journal of High Energy Physics, 2020
We consider non-perturbative superpotentials from world-sheet instantons wrapped on holomorphic genus zero curves in heterotic string theory. These superpotential contributions feature prominently in moduli stabilization and large field axion inflation ...
Evgeny I. Buchbinder, Andre Lukas, Burt A. Ovrut, Fabian Ruehle   +3 more
doaj   +1 more source

Exploring T‐Duality for Self‐Dual Fields

Fortschritte der Physik, Volume 72, Issue 5, May 2024.
Abstract Avatars of T‐duality within Sen's formalism for self‐dual field strengths in various dimensions are studied. This formalism is shown to naturally accommodate the T‐duality relation between Type IIA/IIB theories when compactified on a circle without the need for imposing the self‐duality constraint by hand, as is usually done. The study of this
Subhroneel Chakrabarti, Madhusudhan Raman   +1 more
wiley   +1 more source

On String Integrability: A Journey through the Two‐Dimensional Hidden Symmetries in the AdS/CFT Dualities

Advances in High Energy Physics, Volume 2010, Issue 1, 2010., 2010
One of the main topics in the modern String Theory are the AdS/CFT dualities. Proving such conjectures is extremely difficult since the gauge and string theory perturbative regimes do not overlap. In this perspective, the discovery of infinitely many conserved charges, that is, the integrability, in the planar AdS/CFT has allowed us to reach immense ...
Valentina Giangreco Marotta Puletti, Carlos Nunez   +1 more
wiley   +1 more source

Jumping spectra and vanishing couplings in heterotic Line Bundle Standard Models

Journal of High Energy Physics, 2019
We study two aspects of the physics of heterotic Line Bundle Standard Models on smooth Calabi-Yau threefolds. First, we investigate to what degree modern moduli stabilization scenarios can affect the standard model spectrum in such compactifications ...
James Gray, Juntao Wang
doaj   +1 more source

Unification of Gravity and Internal Interactions

Fortschritte der Physik, Volume 72, Issue 1, January 2024.
Abstract In the gauge theoretic approach of gravity, general relativity is described by gauging the symmetry of the tangent manifold in four dimensions. Usually the dimension of the tangent space is considered to be equal to the dimension of the curved manifold. However, the tangent group of a manifold of dimension d is not necessarily SOd$SO_d$.
Spyros Konitopoulos, Danai Roumelioti, George Zoupanos   +2 more
wiley   +1 more source

Amplitudes on plane waves from ambitwistor strings

Journal of High Energy Physics, 2017
In marked contrast to conventional string theory, ambitwistor strings remain solvable worldsheet theories when coupled to curved background fields. We use this fact to consider the quantization of ambitwistor strings on plane wave metric and plane wave ...
Tim Adamo, Eduardo Casali, Lionel Mason, Stefan Nekovar   +3 more
doaj   +1 more source

A new approach to superstring

Journal of High Energy Physics
We show how starting with one-string space of states in BRST formalism one can construct a large class of physical quantities containing, in particular, scattering amplitudes for bosonic string and superstring.
A. Schwarz
doaj   +1 more source

Confinement from distance in metric space and its relation to cosmological constant

Journal of High Energy Physics
We argue that, in a theory of quantum gravity, the gauge coupling and the confinement scale of a gauge theory are related to distance in the space of metric configurations, and in turn to the cosmological constant. To support the argument, we compute the
Amineh Mohseni, Mahdi Torabian
doaj   +1 more source

Eigenvalue equation for the modular graph C a,b,c,d

Journal of High Energy Physics, 2019
The modular graph C a,b,c,d on the torus is a three loop planar graph in which two of the vertices have coordination number four, while the others have coordination number two. We obtain an eigenvalue equation satisfied by C a,b,c,d for generic values of
Anirban Basu
doaj   +1 more source

Loop amplitudes monodromy relations and color-kinematics duality

Journal of High Energy Physics, 2021
Color-kinematics duality is a remarkable conjectured property of gauge theory which, together with double copy, is at the heart of a wealth of new developments in scattering amplitudes.
Eduardo Casali, Sebastian Mizera, Piotr Tourkine   +2 more
doaj   +1 more source