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New Ekpyrotic Cosmology
- E. Buchbinder, J. Khoury, B. Ovrut
- Physics
- 20 February 2007
In this paper, we present a new scenario of the early universe that contains a pre-big bang ekpyrotic phase. By combining this with a ghost condensate, the theory explicitly violates the null energy…
One-loop amplitudes of gluons in supersymmetric QCD
- R. Britto, E. Buchbinder, F. Cachazo, Bo Feng
- Geology
- 14 March 2005
One-loop amplitudes of gluons in supersymmetric Yang-Mills are four-dimensional cut-constructible. This means that they can be determined from their unitarity cuts. We present a new systematic…
On the Initial Conditions in New Ekpyrotic Cosmology
- E. Buchbinder, J. Khoury, B. Ovrut
- Physics
- 26 June 2007
New Ekpyrotic Cosmology is an alternative scenario of early universe cosmology in which the universe existed before the big bang. The simplest model relies on two scalar fields, whose entropy…
On semiclassical approximation for correlators of closed string vertex operators in AdS/CFT
- E. Buchbinder, A. Tseytlin
- Physics
- 25 May 2010
We consider the 2-point function of string vertex operators representing string state with large spin in AdS5. We compute this correlator in the semiclassical approximation and show that it has the…
Semiclassical four-point functions in AdS5 × S5
- E. Buchbinder, A. Tseytlin
- Physics, Mathematics
- 16 December 2010
We consider a semiclassical (large string tension ∼ $ \sqrt {\lambda } $) limit of 4-point correlator of two “heavy” vertex operators with large quantum numbers and two “light” operators. It can be…
1/N correction in the D3-brane description of a circular Wilson loop at strong coupling
- E. Buchbinder, A. Tseytlin
- Mathematics
- 19 April 2014
We compute the one-loop correction to the probe D3-brane action in AdS5 x S5 expanded around the classical Drukker-Fiol solution ending on a circle at the boundary. It is given essentially by the…
Correlation function of null polygonal Wilson loops with local operators
- L. Alday, E. Buchbinder, A. Tseytlin
- Mathematics, Physics
- 28 July 2011
We consider the correlator $ {{{\left\langle {{W_n}\mathcal{O}} \right\rangle }} \left/ {{\left\langle {{W_n}} \right\rangle }} \right.} $ of a light-like polygonal Wilson loop with n cusps with a…
Holographic gauge theories in background fields and surface operators
- E. Buchbinder, J. Gomis, F. Passerini
- Physics
- 29 October 2007
We construct a new class of supersymmetric surface operators in N = 4 SYM and find the corresponding dual supergravity solutions. We show that the insertion of the surface operator — which is given…
Two-loop amplitudes of gluons and octa-cuts in Script N = 4 super Yang-Mills
- E. Buchbinder, F. Cachazo
- Mathematics
- 15 June 2005
After reduction techniques, two-loop amplitudes in = 4 super Yang-Mills theory can be written in a basis of integrals containing scalar double-box integrals with rational coefficients, though the…
Holomorphic Yukawa couplings in heterotic string theory
- Stefan Blesneag, E. Buchbinder, P. Candelas, A. Lukas
- Mathematics
- 16 December 2015
A bstractWe develop techniques, based on differential geometry, to compute holomorphic Yukawa couplings for heterotic line bundle models on Calabi-Yau manifolds defined as complete intersections in…
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