2014/09/13 by Rafael L. Delgado, R. L. Delgado, Antonio Dobado +8
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.1409.3983
6 pages. Proceedings of the Second Annual Conference on Large Hadron Collider Physics - LCHP 2014, Columbia University, New York, U.S.A (June 2-7, 2014)
arxiv created 2014/09/13 · openalex publication_date 2014/09/13 · arxiv updated 2014/09/16 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
In these proceedings we discuss our recent work on γγ→ W+L W-L and γγ→ ZL ZL within the framework of Electroweak Chiral Lagrangians with a light Higgs. These observables are good candidates to provide indications of physics beyond the Standard Model and can complement other analyses and global fits. Making use of the equivalence theorem, we have performed the computation up to the next-to-leading order in the chiral expansion, i.e., including one-loop corrections and the full set of possible counterterms allowed at that order in the low-energy effective field theory. The one-loop amplitudes turn out to have a extremely simple structure and they are ultraviolet finite. Thus, the relevant combinations of higher order chiral couplings cγr and (a1r-a2r+a3r) do not run. We also identify an additional set of observables that depend on these same parameters, which can be use to complement the γγ analysis through a global fit.