Long-lived biνo at the LHC

We study a bino-like light neutralino ($$ {\overset{\sim }{\chi}}_1^0 $$ χ ~ 1 0 ) produced at the LHC from the decay of a scalar lepton ($$ \tilde{e}_L $$ e ~ L ) through the process pp →$$ \tilde{e}_L $$ e ~ L →$$ e{\overset{\sim }{\chi}}_1^0 $$ e χ ~ 1 0 in the context of R-parity-violating (RPV) supersymmetry where $$ {\overset{\sim }{\chi}}_1^0 $$ χ ~ 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, $$ {\lambda}_{111}^{\prime } $$ λ 111 ′ , in the mass range 10 GeV ≲ $$ {m}_{{\overset{\sim }{\chi}}_1^0} $$ m χ ~ 1 0 ≲ 230 GeV. We perform Monte Carlo simulations and conclude that at the high-luminosity LHC, the proposed search can probe values of $$ {\lambda}_{111}^{\prime } $$ λ 111 ′ down to two orders of magnitude smaller than current bounds and up to 40 times smaller than projected limits from monolepton searches.

Section: Jhep10(2022)095mentioning

confidence: 99%

Searching for light neutralinos with a displaced vertex at the LHC

Cottin

Helo

Neill

et al. 2022

“…At colliders and B-factories, such long-lived light neutralinos can be produced in different channels, including decays of Z-bosons, mesons, τ leptons, and squarks (see refs. [77][78][79][80][81][82][83][84][85] for previous relevant studies). In this work, we focus on the s-channel Z-boson decay into a pair of light neutralinos.…”

Section: Jhep09(2021)026mentioning

confidence: 99%

Time-delayed electrons from neutral currents at the LHC

Cheung

Wang

2021

We investigate long-lived particles (LLPs) produced in pair from neutral currents and decaying into a displaced electron plus two jets at the LHC, utilizing the proposed minimum ionizing particle timing detector at CMS. We study two benchmark models: the R-parity-violating supersymmetry with the lightest neutralinos being the lightest supersymmetric particle and two different U(1) extensions of the standard model with heavy neutral leptons (HNLs). The light neutralinos are produced from the standard model Z-boson decays via small Higgsino components, and the HNLs arise from decays of a heavy gauge boson, Z′. By simulating the signal processes at the HL-LHC with the center-of-mass energy $$ \sqrt{s} $$ s = 14 TeV and integrated luminosity of 3 ab−1, our analyses indicate that the search strategy based on a timing trigger and the final state kinematics has the potential to probe the parameter space that is complementary to other traditional LLP search strategies such as those based on the displaced vertex.

“…Particle phenomenologists have begun exploring the reach of a variety of these detectors for a wide class of models [35][36][37][38][39][40][41][42][43][44], sometimes comparing the reach across different detectors. In this work we take a similar approach, comparing the discovery reach of a broad class of these detectors for Emerging Jets (EJ) [45].…”

Section: Introductionmentioning

confidence: 99%

Emerging jets displaced into the future

Archer-Smith

Linthorne

Stolarski

2022

We examine the potential of future long-lived particle experiments to probe dark QCD models that feature Emerging Jets. The core of this analysis focuses on the transverse detectors AL3X, ANUBIS, CODEX-b, and MATHUSLA as they cover the most relevant parameter space, though the highly forward experiments MAPP, FORMOSA, and FASER are also explored. Geometric coverage of the detectors is calculated and used to determine the number of signal events and kinematic distribution measured for a collection of different benchmark models. This is used to map out the discovery potential of the Emerging Jets parameter space. Although all experiments demonstrate some reach, AL3X, ANUBIS, and MATHUSLA stand out as the most promising for exploring the dark QCD Emerging Jets parameter space.