A Minimal Fermion-Scalar Preonic Model

TL;DR

This paper proposes a minimal fermion-scalar preonic model that predicts new color-octet leptons and color-sextet quarks, and discusses their potential detection at future high-energy colliders, offering insights into preonic structures.

Contribution

It introduces a minimal fermion-scalar preonic model with specific particle content, preventing undesired SM particles, and evaluates collider prospects for detecting predicted preonic states.

Findings

FCC (SppC) pp collider can probe quark sextet masses up to 48-75 TeV.

FCC/SppC ep and μp colliders can explore lepton octet masses up to 23-80 TeV.

Predicted particles could provide first evidence for preonic models.

Abstract

A minimal fermion-scalar preonic model containing two fermionic and one scalar preons is proposed. This scheme allows to prevent the occurrence of undesired SM-level particles, namely leptons and quarks with unusual electric charges. Similar to the previous FS models, color-octet leptons and color-sextet quarks, which are expected to have masses much lower than the compositeness scale, are predicted. Observation of these particles could provide first indications of preonic models. FCC (SppC) pp option will give opportunity to probe $m_{q_{6}}$ up to 48 (75) TeV and $m_{l_{8}}$ up to 15 (27) TeV within one year operation at nominal luminosity. FCC/SppC based ep and $\mu$p colliders will essentially enlarge covered mass region, namely, $m_{e_{8}}$ up to 23/27 TeV and $m_{\mu_{8}}$ up to 68/80 TeV.