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.
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页数：20
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