RT Journal Article
T1 Light 'Higgs', yet strong interactions
A1 Llanes Estrada, Felipe José
A1 Dobado González, Antonio
A1 Delgado López, Rafael
AB The claimed finding of a light Higgs boson makes the minimal Standard Model unitary. Yet, we recall that the general low-energy dynamics for the minimal electroweak symmetry breaking sector with three Goldstone bosons and one light scalar is not so. We construct the effective Lagrangian for these four particles and their scattering amplitudes, that can be extracted from LHC experiments when longitudinal W, Z modes be properly isolated for E >> M-W (equivalence theorem). We then observe the known increase in interaction strength with energy and explore various unitarization methods in the literature in the absence of other new physics (as LHC experiments fail to report anything up to 600 GeV). Our generic conclusion is that for most of parameter space the high-energy scattering of the longitudinal W's is strongly interacting (with the Minimal Standard Model a remarkable exception). We find and study a second sigma-like scalar pole of the WLWL amplitude
PB IOP Publishing Ltd
SN 0954-3899
YR 2014
FD 2014-02
LK https://hdl.handle.net/20.500.14352/33465
UL https://hdl.handle.net/20.500.14352/33465
LA eng
NO © 2014 IOP Publishing Ltd Printed in the UK.FJLE thanks the hospitality of the NEXT institute and the high energy group at the University of Southampton, ADG thanks the CERN-TH, and both the hospitality of the ECT* at Trento during the final stages of this work. This work was supported by Spanish grant FPA2011- 27853-C02-01 and by the grant BES-2012-056054 that supports RDL.
DS Docta Complutense
RD 11 abr 2025