2017/10/31 by Yasumichi Aoki, Tatsumi Aoyama, Ed Bennett +9
Physics and Astronomy · #Fermion #Higgs boson #High-Energy Particle Collisions Research #Lattice (music) #Massless particle #Particle physics theoretical and experimental studies #Physics beyond the Standard Model #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Scalar (mathematics) #Spectrum (functional analysis) #Standard Model (mathematical formulation) #hep-lat
paper · pdf · doi:10.1051/epjconf/201817508023
contribution to the 35th International Symposium on Lattice Field Theory (Lattice 2017). Updated references and acknowledgments
openalex created_date 2017/11/10 · arxiv created 2017/11/17 · openalex publication_date 2018/01/01 · arxiv updated 2018/04/18 · openalex updated_date 2026/08/05
Studying SU(3) gauge theories with increasing number of light fermions is relevant both for understanding the strong dynamics of QCD and for constructing strongly interacting extensions of the Standard Model (e.g. UV completions of composite Higgs models). In order to contrast these many-flavors strongly interacting theories with QCD, we study the flavor-singlet spectrum as an interesting probe. In fact, some composite Higgs models require the Higgs boson to be the lightest flavor-singlet scalar in the spectrum of a strongly interacting new sector with a well defined hierarchy with the rest of the states. Moreover, introducing many light flavors at fixed number of colors can influence the dynamics of the lightest flavor-singlet pseudoscalar. We present the on-going study of these flavor-singlet channels using multiple interpolating operators on high-statistics ensembles generated by the LatKMI collaboration and we compare results with available data obtained by the Lattice Strong Dynamics collaboration. For the theory with 8 flavors, the two collaborations have generated configurations that complement each others with the aim to tackle the massless limit using the largest possible volumes.