LeptonenSleptons

LeptonenSleptons are a hypothetical class of composite particles predicted by some extensions of supersymmetry in which a Standard Model lepton and its scalar superpartner, a slepton, form a bound state under a new confining interaction beyond the Standard Model forces. The term is used in speculative literature to denote fermionic bound states whose properties resemble those of leptons but whose internal structure includes a slepton constituent.

In such frameworks, the LeptonenSlepton would have a fermionic spin, electric charge equal to the sum of the charges of the constituents, and a mass largely determined by the constituent masses and the binding energy. The binding interaction is assumed to be stronger than electromagnetic in the relevant energy range and would be characterized by a new gauge dynamics. Physical consequences include potential lepton-like interactions with Standard Model fields and characteristic decay patterns into lighter SUSY states or Standard Model particles plus missing energy.

Phenomenology and production: At high-energy colliders, LeptonenSleptons would be produced through electroweak or SUSY processes. Depending on the model, they could be promptly decaying or long-lived, leaving displaced vertices or charged tracks. Decay channels might include transitions to a lighter bound state plus a photon or Z boson, or to a Standard Model lepton plus missing energy carried by neutralinos or gravitinos.

Experimental status: There is no experimental evidence for LeptonenSleptons. Searches for exotic bound states, long-lived charged particles, and SUSY scenarios at the LHC place constraints on the masses and lifetimes of such objects, but no dedicated discovery claims have been made.

See also: Supersymmetry, Sleptons, Bound states, Beyond the Standard Model.