XXXIII International (ONLINE) Workshop on High Energy Physics "Hard Problems of Hadron Physics: Non-Perturbative QCD & Related Quests"

The gauge group and flavor number dependence of mV/fPS

10 нояб. 2021 г., 16:30

30m

Lattice Simulations for Hadron Phenomenology Evening session 6

Speaker

Daniel Nogradi

Описание

Composite Higgs model often feature a new strongly interacting sector based on some gauge group and some number of fermions (flavors). The physical scale is typically set by the Goldstone decay constant $f_{PS}$ and a meson state with the appropriate quantum numbers is identified with the Higgs. The lightest vector meson in these scenarios is a potential new, so far undetected, particle. Its mass in physical units $m_V/f_{PS}$ can be unambiguously obtained from non-perturbative lattice simulations and serves as a concrete prediction for every choice of gauge group and flavor number. Results will be shown for $SU(3)$ and $N_f=2,\dots ,10$ as well as a compilation of results from the literature with other gauge groups and/or fermion content, including the large-$N$ limit. Interestingly, the $m_V/f_{PS}$ ratio is finite both inside and outside the conformal window and displays a peculiar $N_f$-dependence.

Presentation materials

rho.pdf