Towards a new paradigm for quark-lepton unification

Abstract : The quark and lepton mass patterns upset their naive unification. In this paper, a new approach to solve this problem is proposed. Model-independently, we find that a successful unification can be achieved. A mechanism is identified by which the large top quark mass renders its third-generation leptonic partner very light. This state is thus identified with the electron. We then provide a generic dynamical implementation of this mechanism, using tree-level exchanges of vector leptons to relate the quark and lepton flavor structures. In a supersymmetric context, this same mechanism splits the squark masses, and third generation squarks end up much lighter than the others. Finally, the implementation of this mechanism in SU(5) GUT permits to avoid introducing any flavor structure beyond the two minimal Yukawa couplings, ensuring the absence of unknown mixing matrices and their potentially large impact on FCNC.
Type de document :
Article dans une revue
Journal of High Energy Physics, Springer, 2017, 05, pp.018. 〈10.1007/JHEP05(2017)018〉
Liste complète des métadonnées
Contributeur : Emmanuelle Vernay <>
Soumis le : vendredi 5 mai 2017 - 09:14:07
Dernière modification le : lundi 9 avril 2018 - 12:22:10

Lien texte intégral





C. Smith. Towards a new paradigm for quark-lepton unification. Journal of High Energy Physics, Springer, 2017, 05, pp.018. 〈10.1007/JHEP05(2017)018〉. 〈in2p3-01518612〉



Consultations de la notice