Unitarized HEFT description of strongly interacting longitudinal electroweak gauge bosons

5 Jun 2018, 16:00
1h 30m
Library, Centro San Domenico

Library, Centro San Domenico

theoretical Posters session

Speaker

Antonio Dobado (Universidad Complutense (ES))

Description

By using the non-linear HEFT it is possible to study the WW, ZZ and WZ elastic
scattering at high energies relevant for the LHC. For most of the parameter space, the scattering is strongly interacting (with the MSM being a remarkable exception). Starting from one loop computations complemented with dispersion relations and the Equivalence Theorem, we obtain different unitarization methods which produce analytical amplitudes correspondingto different approximate solutions to the dispersion relations. The partial waves obtained can show poles in the second Riemann sheet that have the natural interpretation of dynamical resonances with masses and widths depending on the HEFT parameters. We compare the different unitarizations and we find that they are qualitatively, and
in many cases quantitatively, very similar. We apply our results to elastic WW, ZZ amd WZ scattering and also we consider the photon photon and top-antitop channel at NLO order. The amplitudes obtained can be used to get realistic resonant and not resonant cross sections to be compared and to be used for a proper interpretation of the LHC data.

Primary authors

Antonio Dobado (Universidad Complutense (ES)) Felipe J. Llanes-Estrada

Presentation Materials