Decays of a bino-like particle in the low-mass regime

We study the phenomenology associated with a light bino-like neutralino with mass less than or similar to m(tau) in the context of the R-parity violating Minimal Supersymmetric Standard Model. This is a well-motivated example of scenarios producing potentially light and long-lived exotic particles, which might be testable in far-detector experiments, such as the FASER experiment at the Large Hadron Collider. A quantitative assessment of the discovery potential or the extraction of limits run through a detailed understanding of the interactions of the light exotic fermion with Standard Model matter, in particular, the hadronic sector. Here, we propose a systematic analysis of the decays of such a particle and proceed to a model-independent derivation of the low-energy effects, so that this formalism may be transposed to other UV-completions or even stand as an independent effective field theory. We then stress the diversity of the possible phenomenology and more specifically discuss the features associated with the R-parity violating supersymmetric framework, for example neutron-antineutron oscillations.

Automated summary

In this study, we investigate the phenomenology of a light bino-like neutralino with mass less than or similar to m(tau) within the framework of the R-parity violating Minimal Supersymmetric Standard Model. This scenario presents the possibility of producing potentially light and long-lived exotic particles, which can be tested in experiments like the FASER experiment at the Large Hadron Collider. To quantitatively assess the discovery potential and extract limits, a detailed understanding of the interactions between the light exotic fermion and Standard Model matter, particularly the hadronic sector, is necessary. We propose a systematic analysis of the decays of such a particle and derive model-independent low-energy effects, which can be applied to other UV-completions or function as an independent effective field theory.