Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 58, Issue 2, Pages 261-269Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-008-0764-6
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Funding
- DFG Sonderfor-schungsbereich/Transregio SFB/TR9-03
- EU Integrated Infrastructure Initiative Hadron Physics (I3HP) [2004-506078]
- DEISA Extreme Computing Initiative
- STFC [ST/G00062X/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/G00062X/1] Funding Source: researchfish
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We study the flavour-singlet pseudoscalar mesons from first principles using lattice QCD. With N (f)=2 flavours of light quarks, this is the so-called eta (2) meson and we discuss the phenomenological status of this meson. 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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