Results 81 to 90 of about 5,095 (92)

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
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Advanced tools for basis decompositions of genus-one string integrals

Journal of High Energy Physics
In string theories, one-loop scattering amplitudes are characterized by integrals over genus-one surfaces using the Kronecker-Eisenstein series. A recent methodology proposed a genus-one basis formed from products of these series of chain topologies.
Yong Zhang
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Superstring amplitudes from BCJ numerators at one loop

Journal of High Energy Physics
We find a direct map that determines moduli-space integrands for one-loop superstring amplitudes in terms of field-theory loop integrands in the BCJ form. The latter can be computed using efficient unitarity methods, so our map provides an alternative to
Yvonne Geyer, Jiachen Guo, Ricardo Monteiro, Lecheng Ren   +3 more
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Rounding out the story of higher derivative consistent truncations

Journal of High Energy Physics
At the two-derivative order, the group manifold reduction of heterotic supergravity on S 3 results in a half-maximal 7D gauged supergravity coupled to three vector multiplets, and a further truncation can be taken to remove the vector multiplets.
James T. Liu, Robert J. Saskowski
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The physical moduli of heterotic G 2 string compactifications

Journal of High Energy Physics
In previous works, an operator was developed for heterotic compactifications on ℝ2,1 × G 2 and AdS 3 × G 2, which preserves N = 1 d = 3 supersymmetry and whose kernel is related to the moduli of the compactification. The operator is described in terms of
Jock McOrist, Martin Sticka, Eirik Eik Svanes   +2 more
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Recent developments in superstring theory. [PDF]

Proc Natl Acad Sci U S A, 1998
Schwarz JH.
europepmc   +1 more source

Brane Effective Actions, Kappa-Symmetry and Applications. [PDF]

Living Rev Relativ, 2012
Simón J.
europepmc   +1 more source

Superstring amplitudes from the field-theory limit: an n-point map at one loop

Journal of High Energy Physics
Are perturbative superstring amplitudes for massless external states just an α ′ dressing of super-Yang-Mills/supergravity? This is the case at tree level, where the worldsheet correlators at n points can be written in a natural worldsheet basis, such ...
Ricardo Monteiro, Lecheng Ren
doaj   +1 more source

On unitarity of the hypergeometric amplitude

Journal of High Energy Physics
The hypergeometric amplitude is a one-parameter deformation of the Veneziano amplitude for four-point tachyon scattering in bosonic string theory that is consistent with S-matrix bootstrap constraints.
Gareth Mansfield, Marcus Spradlin
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One-loop corrections to the four-graviton interaction in type-II superstring theory and heterotic string theory

Physical Review D, 1988
Various one-loop corrections to the four-graviton interaction in type-II superstring theory and heterotic string theory are sorted out and some of them explicitly calculated. In particular, the leading correction for ..cap alpha..'..-->..0 from the heterotic amplitude is obtained.
, Meissner, , Pawelczyk, , Pokorski
openaire   +2 more sources