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

Searching for light neutralinos with a displaced vertex at the LHC

Nov 2, 2022, 5:00 PM
20m
CERN

CERN

Speaker

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

Description

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))

Co-authors

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