光Sgoldstino现象学：μ子$(g-2)$偏离和KOTO反常的解释
The Light Sgoldstino Phenomenology: Explanations for the Muon $(g-2)$ Deviation and KOTO Anomaly
摘要：
在这项工作中，我们研究了长期存在的实验异常μ子$(g-2)$和最近的异常过剩$K_L\to π^0+ν\barν$在J-PARC KOTO实验与sgoldstino。超对称破缺后，夸克与sgoldstino（$s$）的相互作用使$K\to π+s$衰变通过环图可量化，从而影响了对$K\to π+\mathrm{invisible}$衰变的测量。此外，光子和sgoldstino之间的耦合有助于$Δa_μ$以及bino-slepton贡献。在满足NA 62、E949、E137、Orsay、KTEV和CHARM等实验条件的前提下，这两个反常现象可以同时得到解释。CP偶sgoldstino的质量接近中性π介子质量，不违反Grossman-Nir束缚。参数空间可以在未来的NA 62，DUNE实验以及LHC实验中进一步测试。
英文摘要：
In this work, we study the long-standing experimental anomaly in muon $(g-2)$ and also recent anomalous excess in $K_L\to π^0+ν\barν$ at the J-PARC KOTO experiment with sgoldstino. After supersymmetry breaking, the interactions between quarks and sgoldstino ($s$) make the decays $K\to π+s$ sizable through loop diagrams, which affects the measurements of decays $K\to π+\mathrm{invisible}$. Furthermore, the couplings between photons and sgoldstino contribute to $Δa_μ$ 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.
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