What question did this study set out to answer?

This work aims to explore signatures and detection methods for mirror particles in collider experiments.

July 6, 2026The European Physical Journal Special Topics0 citationsOpen Access

Signatures and probes of mirror mesons at colliders

VMV. A. Mitsou MSMichael Staelens PHPhạm Quang Hưng

Key Points

This work aims to explore signatures and detection methods for mirror particles in collider experiments.
Review of mirror fermion models and their implications at colliders
Analysis of decay processes involving SM particles and light neutral scalars
Focus on long-lived mirror particles and their observable signatures
Identification of final states featuring jets, leptons, and missing momentum
Connection established between Yukawa couplings and observable displaced leptons and jets
Discussion of viable dark-matter candidates and solutions to the strong CP problem

Abstract

Abstract The experimental confirmation of non-vanishing neutrino masses at the sub-eV range poses a challenge for the (otherwise successful) Standard Model (SM). The EW- R ν R model, which gives a solution to this problem via a seesaw mechanism with non-sterile right-handed neutrinos at the electroweak scale, contains mirror fermion doublets and singlets with opposite chirality assignments under the same SUW (2) S U W (2) gauge symmetry. It also features a viable dark-matter candidate and proposes a solution to the strong CP problem. The (electroweak scale) mirror quarks (leptons) decay to SM quarks (leptons) plus very light neutral scalars, giving final states with jets or leptons, scalar mesons and missing momentum. In this paper, we review the signatures through which these mirror particles can be probed at colliders such as the Large Hadron Collider. Emphasis is given to long-lived mirror particles, depending on the associated Yukawa couplings, that can give rise to observable displaced leptons and jets, and heavy hadrons. z

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