SEMINAR


The 2HDM as a probe of EFTs

Duarte Fontes

(Brookhaven National Laboratory)


Sala 2.8.3, IST, Dept. de FĂ­sica
Friday, April 26th, 2024 at 04:00 PM

Abstract

Physics beyond the Standard Model (BSM) can be described in a consistent and general way through an Effective Field Theory (EFT). Ultimately, the goal is to associate eventual deviations of the SM with a particular BSM model. In this talk, I discuss the quality of that association, taking the 2 Higgs Doublet Model (2HDM) as BSM model. More specifically, I consider two EFT approaches to it: the Standard Model EFT (SMEFT) and the Higgs EFT (HEFT). In the former, I compare not only different truncations in the EFT expansion (dimension 6 vs. dimension 8), but I also ascertain the importance of loop matching. As for the HEFT, I question the assumption according to which the matching is unique. I present three HEFT matchings to the 2HDM, and show that different ones should be used according to the process and the region of parameter space.



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With support from FCT through project UIDB/00777/2020


© CFTP 2024

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