Unitarized one-loop graviton-graviton scattering

In this work we interpret the Einstein-Hilbert (EH) Lagrangian of gravitation as the first term of a low-energy effective theory similar to those considered in the chiral Lagrangian approach to low-energy hadron physics or the electroweak chiral Lagragians describing the symmetry breaking sector of...

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Bibliographic Details
Main Authors: Delgado, Rafael L., Dobado, Antonio, Espriu, Domènec
Format: Conference Proceeding
Language:English
Subjects:
Broken symmetry
Elastic scattering
Electroweak model
Gravitons
Helicity
Scattering amplitude
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Summary:In this work we interpret the Einstein-Hilbert (EH) Lagrangian of gravitation as the first term of a low-energy effective theory similar to those considered in the chiral Lagrangian approach to low-energy hadron physics or the electroweak chiral Lagragians describing the symmetry breaking sector of the Standard Model (SM). Starting from the one-loop computation of the elastic gravitongraviton scattering amplitude by Dunbar and Norridge, we unitarize the IR regularized partial waves by using the Inverse Amplitude Method (IAM). This method enlarges the regime of applicability of the perturbative results to higher energies of the order of the Plank scale M P and allows for the possibility of poles in the second Riemann which have the natural interpretation of dynamical resonances. In this work we look for these possible resonances for the +++ and −−−− helicity channels and the J = 0, 2 and 4 partial waves.
ISSN:2100-014X
2101-6275
2100-014X
DOI:10.1051/epjconf/202227408010