October 31, 2022 to November 4, 2022
Europe/Zurich timezone

Searching for light neutralinos with a displaced vertex at the LHC

Nov 2, 2022, 5:00 PM



Fabián Hernández-Pinto (Universidad de La Serena (CL))


We study a bino-like light neutralino ($\tilde \chi_1^0$) produced at the LHC from the decay of a scalar lepton ($\tilde e_L$) through the process $pp\to \tilde e_{L} \to e\tilde \chi_1^0$ in the context of R-parity-violating (RPV) supersymmetry where $\tilde \chi_1^0$ is the lightest supersymmetric particle. For small masses and RPV couplings, the neutralino is naturally long-lived and its decay products can be identified as displaced tracks. Following existing searches, we propose a displaced-vertex search strategy for such a light neutralino with a single RPV coupling switched on, $\lambda'_{111}$, in the mass range 10 GeV ~< $m_{\tilde \chi_1^0}$ ~< 230 GeV. We perform Monte Carlo simulations and conclude that at the high-luminosity LHC, the proposed search can probe values of $\lambda'_{111}$ down to two orders of magnitude smaller than current bounds and up to 40 times smaller than projected limits from monolepton searches.

Primary author

Fabián Hernández-Pinto (Universidad de La Serena (CL))


Giovanna Cottin (Universidad Adolfo Ibáñez (CL)) Nicolas Neill (Universidad de Tarapacá (CL)) Zeren Simon Wang (National Tsing Hua University) Dr juan carlos Helo (Universidad de La Serena)

Presentation materials