Flavor-changing neutral current in production and decay of pseudoscalar mesons in a type III two-Higgs-doublet-model with four-texture Yukawa couplings

Abstract

We study flavor violating processes in the production or decay of a neutral pseudoscalar meson $P^0$ in the framework of a general two Higgs Doublet Model type III (2HDM-III). We use a version of the model where Yukawa interactions of neutral Higgs bosons allow for flavor change at the tree-level, but conserves CP symmetry. We focus on all possible ${\tau }^{\pm }\to l^{\pm }{P}^0$ and $P^0\to l^{+}{l}^{\prime -}$ decay channels, where $l,l^{\prime }$ are charged leptons. We find that these processes provide complementary information on quark and lepton FCNC Yukawa couplings. In particular flavor violating parameters in the quark sector, ${\chi }_{sb}$ and ${\chi }_{db}$, are significantly constrained by present experimental data, whereas the corresponding parameters in the leptonic sector are less constrained.

13 pages, 7 figures

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• Signal to background interference in $pp\to t{H}^{-}\to t{W}^{-}b\bar{b}$ at the LHC Run-II
• Lepton Flavor Violating $\tau$ Decays in Two Higgs Doublet Model III
• On the lepton CP violation in a $\nu$2HDM with flavor
• Probing flavor parameters in the scalar sector and new bounds for the fermion sector
• Scalar-pseudoscalar interactions in neutrino-electron scattering
• LFV couplings of the extra gauge boson Z' and leptonic decay and production of pseudoscalar mesons