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

被引：66

作者：

Andreas, Sarah ^{[1
]}

Lebedev, Oleg ^{[1
]}

Ramos-Sanchez, Saul ^{[1
]}

Ringwald, Andreas ^{[1
]}

机构：

[1] Deutsch Elektronen Synchrotron DESY, D-22603 Hamburg, Germany

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2010年 / 08期

关键词：

Higgs Physics; Rare Decays; Beyond Standard Model; Supersymmetric Standard Model; MINI-LANDSCAPE; SEARCH; BOSONS; MODEL; SIGNALS; LIMITS; DECAY;

D O I：

10.1007/JHEP08(2010)003

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

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

页数：20

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