2007/08/31 by Chuan-Hung Chen, Chao-Qiang Geng, Chung-Wen Kao · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Boson #Cosmology #Cosmology and Gravitation Theories #Gauge (firearms) #Gauge boson #Gauge theory #Higgs boson #Meson #Particle physics #Particle physics theoretical and experimental studies #Phenomenology (philosophy) #Physics #Physics beyond the Standard Model #Pseudoscalar #Quantum mechanics #Scalar boson #Standard Model (mathematical formulation) #Supersymmetry #Theoretical physics #hep-ex #hep-ph
paper · pdf · doi:10.1016/j.physletb.2008.04.053
published as Phys.Lett.B663:400-404,2008 · 12 pages, 2 figures, refs. added, final version to appear in PLB
arxiv created 2008/04/22 · openalex publication_date 2008/04/30 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We show that the very light spin-1 gauge U-boson of the extra U(1)' gauge model in the framework of the supersymmetric standard model extension can be a good candidate of the new light particle suggested by the HyperCP experiment. We demonstrate that the flavor changing neutral currents (FCNCs) for the HyperCP events in the decay of Σ+→ p μ+ μ- can be generated at both tree and loop levels. In particular, we find that the loop induced s→ d U transition due to the tensor-type interaction with the dimension-5 electric dipole operator plays a very important role on the FCNCs. Our explanation of the HyperCP data with the spin-1 U-boson is different from that based on a light pseudoscalar Higgs boson or sgoldstino in the literature. In particular, the U-boson involves a rich phenomenology in particle physics as well as cosmology.