Issue |
EPJ Web Conf.
Volume 274, 2022
XVth Quark Confinement and the Hadron Spectrum Conference (ConfXV)
|
|
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Article Number | 08010 | |
Number of page(s) | 7 | |
Section | 8 - Parallel Track G | |
DOI | https://doi.org/10.1051/epjconf/202227408010 | |
Published online | 22 December 2022 |
https://doi.org/10.1051/epjconf/202227408010
Unitarized one-loop graviton-graviton scattering
1 Matemática Aplicada a las TIC, ETSIS de Telecomunicación, Universidad Politécnica de Madrid (Campus Sur) 28031 Madrid, Spain
2 Departamento de Física Teórica and IPARCOS, Universidad Complutense de Madrid, 28040 Madrid, Spain
3 Departament de Física Quàntica i Astrofísica and Institut de Ciències del Cosmos (ICCUB), Universitat de Barcelona, 08028 Barcelona, Catalonia, Spain
* e-mail: rafael.delgado@upm.es
** e-mail: dobado@fis.ucm.es
*** e-mail: espriu@icc.ub.edu
Published online: 22 December 2022
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 MP 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.
© The Authors, published by EDP Sciences, 2022
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