New physics in double Higgs production at future e + e − colliders

• Autor(a) principal: Vasquez, Andres [UNESP]
• Data de Publicação: 2019
• Outros Autores: Degrande, Céline [UNESP], Tonero, Alberto, Rosenfeld, Rogerio [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1007/JHEP05(2019)020; http://hdl.handle.net/11449/189075
• topic: Beyond Standard Model; Higgs Physics

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.