XII Latin American Symposium on High Energy Physics

Muon g−2 in the 2HDM: updates on maximum results and phenomenology

27 Nov 2018, 15:35

15m

Room N111, McGregor Building (PUCP)

Parallel Talk (Theory) Beyond the Standard Model Parallel Talks A

Speaker

Adriano Cherchiglia (Universidade Federal do ABC)

Description

In this work, we categorize and discuss the maximum contributions to the muon magnetic moment $a_{\mu }$ as well as to the Yukawa and triple Higgs couplings in the flavour-aligned two-Higgs doublet model (2HDM). We focus on the most promising case of a light pseudoscalar Higgs A with large Yukawa couplings to leptons and quarks. By taking into account experimental constraints from LHC, Higgs and flavour physics, we find maximum possible Yukawa couplings of a light A of around $50\cdots 100$ (leptons) and $O(0.5)$ (quarks). An overall maximum for $a_{\mu }$ of more than $45\times {10}^{-10}$ is possible in a very small parameter region around $M_A=20GeV$. For $M_A$ up to $100GeV$, the maximum possible value of $a_{\mu }$ is compatible with the currently observed deviation if the A couplings to quarks and leptons are both large, making this scenario promising for LHC searches. We also analyse the subleading bosonic two-loop contributions to $a_{\mu }$ , finding values up to $3\times {10}^{-10}$.
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Presentation materials

Apresentação_Cherchiglia_25_11.pdf