TY - JOUR
T1 - Long-lived light neutralinos at Belle II
AU - Dey, Sourav
AU - Dib, Claudio O.
AU - Helo, Juan Carlos
AU - Nayak, Minakshi
AU - Neill, Nicolás A.
AU - Soffer, Abner
AU - Wang, Zeren Simon
N1 - Publisher Copyright:
© 2021, The Author(s).
PY - 2021/2
Y1 - 2021/2
N2 - We consider light neutralinos of mass about 1 GeV, produced from τ lepton rare decays at Belle II, in the context of R-parity-violating (RPV) supersymmetry. With large and clean samples of τ leptons produced at the Belle II experiment, excellent sensitivity to such light neutralinos with the exotic signatures of displaced vertices is expected. We focus on two benchmark scenarios of single RPV operators, λ311′L3Q1D¯1 and λ312′L3Q1D¯2, which induce both the production and decay of the lightest neutralino. For the reconstruction of a displaced vertex, we require at least two charged pions in the final states. We perform Monte-Carlo simulations for both signal and background events, and find that Belle II can explore regions in the parameter space competitive with other probes. In particular, for the λ311′ scenario, it can put limits up to two orders of magnitude stronger than the current bounds.
AB - We consider light neutralinos of mass about 1 GeV, produced from τ lepton rare decays at Belle II, in the context of R-parity-violating (RPV) supersymmetry. With large and clean samples of τ leptons produced at the Belle II experiment, excellent sensitivity to such light neutralinos with the exotic signatures of displaced vertices is expected. We focus on two benchmark scenarios of single RPV operators, λ311′L3Q1D¯1 and λ312′L3Q1D¯2, which induce both the production and decay of the lightest neutralino. For the reconstruction of a displaced vertex, we require at least two charged pions in the final states. We perform Monte-Carlo simulations for both signal and background events, and find that Belle II can explore regions in the parameter space competitive with other probes. In particular, for the λ311′ scenario, it can put limits up to two orders of magnitude stronger than the current bounds.
KW - Supersymmetry Phenomenology
UR - http://www.scopus.com/inward/record.url?scp=85107351336&partnerID=8YFLogxK
U2 - 10.1007/JHEP02(2021)211
DO - 10.1007/JHEP02(2021)211
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AN - SCOPUS:85107351336
SN - 1126-6708
VL - 2021
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 2
M1 - 211
ER -