The eta' meson from lattice QCD

Details The eta' meson from lattice QCD The eta' meson from lattice QCD

2008-04-24

arxiv.org/abs/0804.3871v2

Physics

High Energy Physics

High Energy Physics - Lattice

16 pages: version accepted for publication

Scientific paper

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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