Adding a second fractionally charged particle can weaken existing LHC bounds on the heavy partner by factors of a few while boosting production of the light partner by up to three orders of magnitude, motivating new inclusive and missing-energy searches.
A statistical combination of ATLAS Run 2 searches for charginos and neutralinos at the LHC
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abstract
Statistical combinations of searches for charginos and neutralinos using various decay channels are performed using $139\,$fb$^{-1}$ of $pp$ collision data at $\sqrt{s}=13\,$TeV with the ATLAS detector at the Large Hadron Collider. Searches targeting pure-wino chargino pair production, pure-wino chargino-neutralino production, or higgsino production decaying via Standard Model $W$, $Z$, or $h$ bosons are combined to extend the mass reach to the produced SUSY particles by 30-100 GeV. The depth of the sensitivity of the original searches is also improved by the combinations, lowering the 95% CL cross-section upper limits by 15%-40%.
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Phenomenology of Fractionally Charged Particles: Two Reps Are Better Than One
Adding a second fractionally charged particle can weaken existing LHC bounds on the heavy partner by factors of a few while boosting production of the light partner by up to three orders of magnitude, motivating new inclusive and missing-energy searches.