Quark-universal $U(1)$ breaking scalar at the LHC
Abstract
If the quarks or leptons are charged under a new gauge symmetry, then besides a boson there must exist at least one new boson whose decay products include Standard Model particles. In the case of a minimal symmetry breaking sector, that new boson is a scalar that couples to the boson as well as to the new fermions required to cancel the gauge anomalies. The scalar may be produced at the LHC in association with a boson, or through boson fusion, while its decays are typically into four jets or two photons. We analyze in detail the case where the boson is leptophobic, and all the quarks have the same charge under the new . If mixes with the Standard Model Higgs boson, then the new scalar can also be produced via gluon fusion, and the discovery mode is likely to be a diphoton resonance.
Cite
@article{arxiv.2506.06068,
title = {Quark-universal $U(1)$ breaking scalar at the LHC},
author = {Lorin Armbruster and Bogdan A. Dobrescu and Felix Yu},
journal= {arXiv preprint arXiv:2506.06068},
year = {2025}
}
Comments
36 pages, 13 figures