Abstract
We study the effects of new physics in double Higgs production at future e+e− colliders. In the Standard Model the chiral limit (me = 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.
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Vasquez, A., Degrande, C., Tonero, A. et al. New physics in double Higgs production at future e+e− colliders. J. High Energ. Phys. 2019, 20 (2019). https://doi.org/10.1007/JHEP05(2019)020
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DOI: https://doi.org/10.1007/JHEP05(2019)020