Meson spectrum of Sp(4) lattice gauge theory with two fundamental Dirac fermions

Jong Wan Lee*, Ed Bennett, Deog Ki Hong, C. J. David Lin, Biagio Lucini, Maurizio Piai, Davide Vadacchino

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


We calculate the meson spectrum of the Sp(4) lattice gauge theory coupled to two fundamental flavours of dynamical Dirac fermions. We focus on some of the lightest (flavoured) spin-0 and spin-1 states. This theory provides an ultraviolet completion for composite Higgs models based upon the SU(4)/Sp(4) coset. We analyse the strongly coupled dynamics in isolation, without explicit coupling to the standard model. We carry out continuum extrapolations using dynamical ensembles generated at five different values of bare lattice coupling, and for several values of the bare fermion mass. We fit the resulting meson masses and decay constants to a low-energy effective field theory built along the ideas of hidden local symmetry. We also compare our results to those of other closely related lattice gauge theories, which have matter content consisting of two fundamental Dirac flavours.

Original languageEnglish
Article number054
JournalProceedings of Science
StatePublished - Jun 2019
Event37th International Symposium on Lattice Field Theory, LATTICE 2019 - Wuhan, China
Duration: 16 Jun 201922 Jun 2019


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