Rare decay ${\pi }^0\to e^{+}{e}^{-}$ constraints on the light CP-odd Higgs in NMSSM

Abstract

We constrain the light CP-odd Higgs $A_1^0$ in NMSSM via the rare decay ${\pi }^0\to e^{+}{e}^{-}$. It is shown that the possible $3\sigma$ discrepancy between theoretical predictions and the recent KTeV measurement of $\mathcal{B}({\pi }^0\to e^{+}{e}^{-})$ cannot be resolved when the constraints from ${\rm Y}\to \gamma A_1^0$, $a_{\mu }$ and ${\pi }^0\to \gamma \gamma$ are combined. Furthermore, the combined constraints also exclude the scenario involving $m_{A_1^0}=214.3$ MeV, which is invoked to explain the anomaly in the ${\Sigma }^{+}\to p{\mu }^{+}{\mu }^{-}$ decay found by the HyperCP Collaboration.

16 pages, 5 figures. Title changed, pi-A mixing included. Version to appear in PLB

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Cited by in corpus (19)

• The Next-to-Minimal Supersymmetric Standard Model
• Constraints on a very light CP-odd Higgs of the NMSSM and other axion-like particles
• Two-loop QED radiative corrections to the decay pi0 -> e+ e- : The virtual corrections and soft-photon bremsstrahlung
• The NMSSM lives: with the 750 GeV diphoton excess
• Revisiting $B_s\to {\mu }^{+}{\mu }^{-}$ in the two-Higgs doublet models with $Z_2$ symmetry
• Decays of a NMSSM CP-odd Higgs in the low-mass region
• $\eta$ and ${\eta }^{\prime }$ decays into lepton pairs
• Improved Standard-Model prediction for ${\pi }^0\to e^{+}{e}^{-}$
• How the recent BABAR data for P to γγ* affect the Standard Model predictions for the rare decays P to l+l-
• Phenomenological discriminations of the Yukawa interactions in two-Higgs doublet models with $Z_2$ symmetry
• Search for the ${\eta }^{\prime }\to e^{+}{e}^{-}$ decay with the SND detector
• Rare B Decays with a HyperCP Particle of Spin One
• Search for the process ${\mathbf{e}}^{+}{\mathbf{e}}^{-}\to \eta$
• Decay rate and asymmetries of ${\Sigma }^{+}\to p{\mu }^{+}{\mu }^{-}$
• On a search for the $\eta \to e^{+}{e}^{-}$ decay at the VEPP-2000 $e^{+}{e}^{-}$ collider
• Chiral expansion for pi^0 decays
• Study on the effects of the light CP-odd Higgs via the leptonic decays of pseudoscalar mesons
• Pseudoscalar decays into lepton pairs from rational approximants
• Search for η-->e+e- decay with the WASA experiment