https://doi.org/10.1140/epjc/s10052-019-7137-1
Regular Article - Theoretical Physics
Strong dynamics with matter in multiple representations: 
gauge theory with fundamental and sextet fermions
1
Higgs Centre for Theoretical Physics, School of Physics and Astronomy and University of Edinburgh, Edinburgh, EH9 3FD, UK
2
Alan Turing Institute, London, NW1 2DB, UK
3
Ascent Robotics, 150-0012, Shibuja-ku, Tokyo, Japan
4
Department of Physics, University of Turin, Turin, Italy
5
INFN, Turin, Via Pietro Giuria 1, 10125, Turin, Italy
* e-mail: david.preti@to.infn.it
Received:
7
May
2019
Accepted:
13
July
2019
Published online:
30
July
2019
We present a non-perturbative lattice study of gauge theory with two flavors of fermions in the fundamental representation and two in the two-index antisymmetric representation: a theory closely related to a minimal partial-compositeness model for physics beyond the Standard Model, that was proposed by Ferretti. We discuss the phase structure of the lattice theory and report results for various observables of interest, including the masses of states obtained from different combinations of valence fermions and the spectrum of the Dirac operator. Finally, we comment on the extension of this type of studies to other partial-compositeness models (including, in particular, one that was recently suggested by Gertov et al.), which could admit lighter top-quark partners, highlighting some key features of our lattice simulation algorithm, that make it suitable for such generalizations.
© The Author(s), 2019
