Constraints on a very light CP-odd Higgs of the NMSSM and other axion-like particles

被引：0

作者：

Sarah Andreas

Oleg Lebedev

Saúl Ramos-Sánchez

Andreas Ringwald

机构：

[1] Deutsches Elektronen-Synchrotron DESY,

来源：

Journal of High Energy Physics | / 2010卷

关键词：

Higgs Physics; Rare Decays; Beyond Standard Model; Supersymmetric Standard Model;

D O I：

暂无

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学科分类号：

摘要：

In the NMSSM, a light CP-odd Higgs arises due to spontaneous breaking of approximate symmetries such as Peccei-Quinn or R-symmetry and is motivated by string theory. The case when it is heavier than two muons is well studied and constrained. We analyze various meson decay, g − 2, beam dump and reactor bounds on the CP-odd Higgs with mass below the muon threshold, in particular, addressing the question how light a CP-odd Higgs can be. We find that it has to be heavier than 210 MeV or have couplings to fermions 4 orders of magnitude below those of the Standard Model Higgs. Our analysis applies more generally to couplings of a light pseudoscalar to matter.

引用

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