Third-family quark-lepton unification with a fundamental composite Higgs

• Published in: Physics letters. B Vol. 811; p. 135953
• Main Authors: Fuentes-Martín, Javier, Stangl, Peter
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 10-12-2020; Elsevier
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2020.135953

We present a model for third-family quark-lepton unification at the TeV scale featuring a composite Higgs sector. The model is based on a variant of the Pati-Salam model, the so-called 4321 model, consisting of the gauge group SU(4)×SU(3)′×SU(2)L×U(1)X. The spontaneous symmetry breaking to the SM gauge group is triggered dynamically by a QCD-like confining sector. The same strong dynamics also produces the Higgs as a pseudo Nambu-Goldstone boson, connecting the energy scales of both sectors. The model predicts a massive U1 vector leptoquark coupled dominantly to the third generation, recently put forward as a possible solution to the B-meson anomalies.