Two Higgs doublet model and leptoquarks constraints from D meson decays

TL;DR

This paper constrains scalar leptoquark and charged Higgs interactions using D meson decay data, providing new bounds on particle masses and interactions, with implications for Two Higgs Doublet Models and leptoquark physics.

Contribution

It offers the first combined analysis of D meson decays to constrain both scalar leptoquarks and charged Higgs interactions simultaneously.

Findings

Charged Higgs mass range 6.3-63.1 GeV at 90% C.L.

More restrictive bounds on leptoquark states than previous studies.

Compatibility of results with other constraints at 95% C.L.

Abstract

We use a combined analysis of the semileptonic and leptonic branching ratios of the D mesons to constrain scalar leptoquark interactions and charged higgs-like interactions. For the THDM type II, we found that a low mass 6.3GeV < m_{H^+} < 63.1GeV for the charged Higgs is favored at 90% C.L. although at 95% there is still agreement with other constraints. We find for the leptoquark states a more restrictive bound than previous analysis.