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SUMMARY:EW Chiral Lagrangian with a Light Higgs and  the  gamma gamma--> W
 L+ WL−  and  gamma gamma-->ZL ZL scattering at One Loop
DTSTART;VALUE=DATE-TIME:20140705T080000Z
DTEND;VALUE=DATE-TIME:20140705T081500Z
DTSTAMP;VALUE=DATE-TIME:20260510T235004Z
UID:indico-contribution-1432@indico.ific.uv.es
DESCRIPTION:Speakers: Juan Jose Sanz-Cillero (Universidad Autonoma de Madr
 id - IFT)\nIn this work we study the $\\gamma\\gamma\\to W^+_L W^-_L$ and 
 $\\gamma\\gamma\\to  Z_L Z_L$ scattering processes within the effective ch
 iral Lagrangian approach\, including a light Higgs-like scalar as a dynami
 cal field together with the would-be-Goldstone bosons $w^\\pm$ and $z$ ass
 ociated to the electroweak symmetry breaking. This approach is inspired by
  the possibility that the Higgs-like boson be a composite particle behavin
 g as another Goldstone boson\, and assumes the existence of a mass gap bet
 ween $m_h$\, $m_W$\, $m_Z$ and the potential new emergent resonances\, set
 ting an intermediate energy region (above $m_{h\,W\,Z}$ and below the reso
 nance masses) where the use of these effective chiral Lagrangians are the 
 most appropriate tools to compute the relevant observables. We analyse in 
 detail the proper chiral counting rules for the present case of photon-pho
 ton scattering  and provide the one-loop $\\gamma\\gamma\\to W^+_L W^-_L$ 
 and $\\gamma\\gamma\\to  Z_L Z_L$\nscattering amplitudes within this Effec
 tive Chiral Lagrangian approach\, including a discussion on the involved r
 enormalization procedure. We also propose here a joint analysis of our res
 ults for the two-photon scattering amplitudes together with other photonic
  processes and electroweak precision observables for a future comparison w
 ith data. This could help to disentangle the nature of the light Higgs-lik
 e particle.\n\nhttps://indico.ific.uv.es/event/2025/contributions/1432/
LOCATION: Auditorium 1
URL:https://indico.ific.uv.es/event/2025/contributions/1432/
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