Author(s): Vasquez, Andres [UNESP] ; Degrande, Céline [UNESP] ; Tonero, Alberto ; Rosenfeld, Rogerio [UNESP]
Date: 2019
Persistent ID: http://hdl.handle.net/11449/189075
Origin: Oasisbr
Subject(s): Beyond Standard Model; Higgs Physics; Beyond Standard Model; Beyond Standard Model; Higgs Physics; Higgs Physics
Made available in DSpace on 2019-10-06T16:28:57Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-05-01
We study the effects of new physics in double Higgs production at future e + e − colliders. In the Standard Model the chiral limit (m e = 0) plays an important role for this process, being responsible for the smallness of the tree-level diagrams with respect to the 1-loop contributions. In our work, we consider the possibility of an enhancement due to the contribution of Standard Model dimension-six effective operators. We show that there are only two relevant operators for this process that are not yet (strongly) constrained by other data. We perform a sensitivity study on the operator coefficients for several benchmark values of energy and integrated luminosity related to the proposed linear colliders such as CLIC, ILC and FCC-ee and we derive expected 95% CL limits for each benchmark scenario.
ICTP South American Institute for Fundamental Research & Instituto de Física Teórica UNESP — Universidade Estadual Paulista, Rua Dr. Bento T. Ferraz 271
Centre for Cosmology Particle Physics and Phenomenology (CP3) Université Catholique de Louvain
Ottawa-Carleton Institute for Physics Carleton University, 1125 Colonel By Drive
ICTP South American Institute for Fundamental Research & Instituto de Física Teórica UNESP — Universidade Estadual Paulista, Rua Dr. Bento T. Ferraz 271
