10 Result(s)
within
John Joseph M. Carrasco
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Open AccessEven-point multi-loop unitarity and its applications: exponentiation, anomalies and evanescence
We identify novel structure in newly computed multi-loop amplitudes and quantum actions for even-point effective field theories, including both the nonlinear sigma model (NLSM) and double-copy gauge theories s...
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Open AccessDouble-copy towards supergravity inflation with α-attractor models
Key to the simplicity of supergravity α-attractor models of inflation are Volkov-Akulov fermions, often in the form of nilpotent superfields. Here we explore the possibility of using the double-copy to construct ...
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Open AccessExtracting Einstein from the loop-level double-copy
The naive double-copy of (multi) loop amplitudes involving massive matter coupled to gauge theories will generically produce amplitudes in a gravitational theory that contains additional contributions from pro...
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Open AccessComposing effective prediction at five points
Color-kinematics duality in the adjoint has proven key to the relationship between gauge and gravity theory scattering amplitude predictions. In recent work, we demonstrated that at four-point tree-level, a sm...
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Open AccessSemi-abelian Z-theory: NLSM+ϕ 3 from the open string
We continue our investigation of Z-theory, the second double-copy component of open-string tree-level interactions besides super-Yang-Mills (sYM). We show that the amplitudes of the extended non-linear sigma mode...
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Open AccessAbelian Z-theory: NLSM amplitudes and α ′ -corrections from the open string
In this paper we derive the tree-level S-matrix of the effective theory of Goldstone bosons known as the non-linear sigma model (NLSM) from string theory. This novel connection relies on a recent realization o...
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Open Accessα-attractors: Planck, LHC and dark energy
We develop four-parameter supergravity models of inflation and dark energy, constrained so that ...
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Open AccessJourneys through antigravity?
A possibility of journeys through antigravity has recently been proposed, with the suggestion that Weyl-invariant extension of scalars coupled to Einstein gravity allows for an unambiguous classical evolution ...
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One-loop four-point amplitudes in pure and matter-coupled \( \mathcal{N}\leq 4 \) supergravity
We construct all supergravity theories that can be obtained through factorized orbifold projections of \( \mathcal{N}=8 \) ...
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Open AccessThe effective field theory of cosmological large scale structures
Large scale structure surveys will likely become the next leading cosmological probe. In our universe, matter perturbations are large on short distances and small at long scales, i.e. strongly coupled in the U...
