Mirror mesons at the Large Hadron Collider (LHC)

TL;DR

This paper explores the theoretical existence of mirror mesons at the LHC, proposing a new strong interaction mechanism that produces a range of mirror particles with distinctive masses and potential observable signatures.

Contribution

It introduces a novel mirror fermion model with strong coupling at TeV energies, predicting mirror mesons with specific mass ranges and phenomenology relevant for collider experiments.

Findings

Mirror mesons could have masses from 0.1 to 2.8 TeV.

Some predicted signatures align with LHC observations of diphoton decays.

Cross-sections for mirror-meson production are calculated.

Abstract

The existence of mirror partners of Standard-Model fermions offers a viable alternative to a fundamental BEH mechanism, with the coupling corresponding to the gauged mirror generation symmetry becoming naturally strong at energies around 1 TeV. The resulting non-perturbative processes produce dynamical katoptron masses which might range from 0.1 to 1.15 TeV in a way circumventing usual problems with the S parameter. Moreover, they create mirror mesons belonging in two main groups, with masses differing from each other approximately by a factor of six and which might range approximately from 0.1 to 2.8 TeV. Since the corresponding phenomenology expected at hadron colliders is particularly rich, some interesting mirror-meson cross-sections are presented, something that might also lead to a deeper understanding of the underlying mirror fermion structure. Among other findings, results in principle compatible with indications from LHC concerning decays of new particles to two photons are analyzed.