The eta' meson from lattice QCD
ETM Collaboration: K. Jansen, C. Michael, C. Urbach
TL;DR
This paper uses lattice QCD with two light quark flavors to compute the eta' meson mass, providing first-principles insights into its properties and phenomenological relevance.
Contribution
The study presents the first lattice QCD calculation of the eta' meson mass with physical light quark masses using maximally twisted-mass fermions.
Findings
Estimated eta' meson mass at physical quark masses
Mass values obtained at two lattice spacings
Insights into the phenomenological status of the eta' meson
Abstract
We study the flavour singlet pseudoscalar mesons from first principles using lattice QCD. With N_f=2 flavours of light quark, this is the so-called eta_2 meson and we discuss the phenomenological status of this. Using maximally twisted-mass lattice QCD, we extract the mass of the eta_2 meson at two values of the lattice spacing for lighter quarks than previously discussed in the literature. We are able to estimate the mass value in the limit of light quarks with their physical masses.
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