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Quantizing non-projectable Hořava gravity with Lagrangian path integral
D. Blas, F. Del Porro, M. Herrero-Valea +2
We formulate the quantum version of non-projectable Hořava gravity as a Lagrangian theory with a path integral in the configuration space with an ultra-local in time, but non-local…
Megahertz Gravitational Waves from Neutron Star Mergers
Diego Blas, Jorge Casalderrey-Solana, David Mateos +1
Neutron star mergers provide a unique laboratory for the study of strong-field gravity coupled to quantum chromodynamics in extreme conditions. The frequencies and amplitudes of th…
Unitarization of infinite-range forces: graviton-graviton scattering
Diego Blas, Jorge Martin Camalich, Jose Antonio Oller
A method to unitarize the scattering amplitude produced by infinite-range forces is developed and applied to Born terms. In order to apply -matrix techniques, based on unitarity…
Scalar resonance in graviton-graviton scattering at high-energies: the graviball
D. Blas, J. Martin Camalich, J. A. Oller
We study graviton-graviton scattering in partial-wave amplitudes after unitarizing their Born terms. In order to apply S-matrix techniques, based on unitarity and analyticity, we i…
Hořava gravity is asymptotically free (in 2+1 dimensions)
Andrei O. Barvinsky, Diego Blas, Mario Herrero-Valea +2
We compute the -functions of marginal couplings in projectable Hořava gravity in spacetime dimensions. We show that the renormalization group flow has an asymptotically-fr…
Renormalization of gauge theories in the background-field approach
Andrei O. Barvinsky, Diego Blas, Mario Herrero-Valea +2
Using the background-field method we demonstrate the Becchi-Rouet-Stora-Tyutin (BRST) structure of counterterms in a broad class of gauge theories. Put simply, we show that gauge i…