https://doi.org/10.1140/epjs/s11734-026-02498-2
Review
Signatures and probes of mirror mesons at colliders
1
Instituto de Física Corpuscular (IFIC), CSIC – Universitat de València, Catedrático José Beltrán, 2, 46980, Paterna, Valencia, Spain
2
Department of Physics, University of Alberta, 11335 Saskatchewan Drive NW, T6G 2E1, Edmonton, AB, Canada
3
Department of Physics, University of Virginia, 382 McCormick Rd, 22904, Charlottesville, VA, USA
a
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Received:
6
May
2026
Accepted:
22
June
2026
Published online:
4
July
2026
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-
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 
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
Dedicated to the memory of Prof. Pham Quang Hung (June 10, 1950–October 7, 2024).
© The Author(s) 2026
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