Results 51 to 60 of about 5,095 (92)
On the superstrings-induced four-dimensional gravity, and its applications to cosmology [PDF]
, 2008 We review the status of the fourth-order (quartic in the spacetime curvature) terms induced by superstrings/M-theory (compactified on a warped torus) in the leading order with respect to the Regge slope parameter, and study their (non-perturbative ...
Iihoshi, Masao, Ketov, Sergei V.
core +3 more sources
Journal of High Energy PhysicsWe 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
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T-duality invariant effective actions at orders α′, α′2
Journal of High Energy Physics, 2018 We use compatibility of the D-dimensional effective actions for diagonal metric and for dilaton with the T-duality when theory is compactified on a circle, to find the D-dimensional couplings of curvatures and dilaton as well as the higher derivative ...
Hamid Razaghian, Mohammad R. Garousi
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Supermoduli and PCOs at genus two
Journal of High Energy Physics, 2023 We illustrate the relation between supermoduli integration and picture changing operators (PCOs) particularly concerning the role of vertical integration, in the context of superstring vacuum amplitudes, by an explicit comparison of different ...
Charles Wang, Xi Yin
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Heterotic and bosonic string amplitudes via field theory
Journal of High Energy Physics, 2018 Previous work has shown that massless tree amplitudes of the type I and IIA/B superstrings can be dramatically simplified by expressing them as double copies between field-theory amplitudes and scalar disk/sphere integrals, the latter containing all the ...
Thales Azevedo +3 more
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Ambitwistor strings in six and five dimensions
Journal of High Energy Physics, 2021 Ambitwistor strings are chiral (holomorphic) strings whose target is the space of complex null geodesics, ambitwistor space. We introduce twistor representations of ambitwistor space in 6 and 5 dimensions.
Yvonne Geyer +2 more
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Remarks on Covariant Matrix Strings [PDF]
, 1999 We address the issue of the worldsheet and spacetime covariant formulation for matrix strings. The problem is solved in the limit of vanishing string coupling.
Bakas +18 more
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Confinement from distance in metric space and its relation to cosmological constant
Journal of High Energy PhysicsWe 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
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The Bosonic Ancestor of Closed and Open Fermionic Strings [PDF]
, 2002 We review the emergence of the ten-dimensional fermionic closed string theories from subspaces of the Hilbert space of the 26-dimensional bosonic closed string theory compactified on an $E_8\times SO(16)$ lattice.
Englert, Francois +2 more
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Massless representation of massive superfields and tree amplitudes with the pure spinor formalism
Journal of High Energy PhysicsWe construct the unintegrated vertex operator at the first mass level of the open superstring from the OPE of massless vertices. Using BRST cohomology manipulations, the tree amplitude of two massless and one massive state is rewritten in terms of the ...
Sitender Pratap Kashyap +3 more
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