The light sgoldstino phenomenology: explanations for the muon (g − 2) deviation and KOTO anomaly
| Autor: | Ying Li, Tianjun Li, Bin Zhu, Xuewen Liu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Quark
Physics Nuclear and High Energy Physics Particle physics Large Hadron Collider Muon 010308 nuclear & particles physics High Energy Physics::Phenomenology FOS: Physical sciences Parameter space 01 natural sciences Supersymmetry breaking High Energy Physics - Experiment High Energy Physics - Phenomenology High Energy Physics - Experiment (hep-ex) High Energy Physics - Phenomenology (hep-ph) Pion Supersymmetry Phenomenology Sgoldstino 0103 physical sciences lcsh:QC770-798 lcsh:Nuclear and particle physics. Atomic energy. Radioactivity High Energy Physics::Experiment 010306 general physics Phenomenology (particle physics) |
| Zdroj: | Journal of High Energy Physics Journal of High Energy Physics, Vol 2020, Iss 10, Pp 1-18 (2020) |
| Popis: | In this work, we study the long-standing experimental anomaly in muon $(g-2)$ and also recent anomalous excess in $K_L\to \pi^0+\nu\bar\nu$ at the J-PARC KOTO experiment with sgoldstino. After supersymmetry breaking, the interactions between quarks and sgoldstino ($s$) make the decays $K\to \pi+s$ sizable through loop diagrams, which affects the measurements of decays $K\to \pi+\mathrm{invisible}$. Furthermore, the couplings between photons and sgoldstino contribute to $\Delta a_\mu$ as well as the bino-slepton contribution. With satisfying all known experimental constraints such as from NA62, E949, E137, Orsay, KTEV and CHARM experiments, these two anomalies can be explained simultaneously. The mass of CP-even sgoldstino is close to the neutral pion mass which does not violate the Grossman-Nir bound. The parameter space can be further tested in future NA62, DUNE experiments, as well as experiments in the LHC. Comment: 17 pages, 4 figures, version accepted by JHEP |
| Databáze: | OpenAIRE |
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