Recent development in the tmLQCD software suite

Urbach, Carsten; Abdel-Rehim, Abdou; Burger, Florian; Deuzeman, Albert; Jansen, Karl; Kostrzewa, Bartosz; Scorzato, L.

doi:10.22323/1.187.0414

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2014

2024

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Cited by 10 publications

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“…K. O. and C. U. were supported by the BCGS of Physics and Astronomie. The open source software packages tmLQCD [38,39,40], Lemon [41], and R [42] have been used.…”

Section: Discussionmentioning

confidence: 99%

$\eta$ and $\eta'$ masses and decay constants from lattice QCD with $N_f=2+1+1$ quark flavours

Michael¹,

Ottnad²,

Urbach³

2014

Proceedings of 31st International Symposium on Lattice Field Theory LATTICE 2013 — PoS(LATTICE 2013)

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We investigate the masses and decay constants of η and η ′ mesons using the Wilson twisted mass formulation with N f = 2 + 1 + 1 dynamical quark flavours based on gauge configurations of ETMC. We show how to efficiently subtract excited state contributions to the relevant correlation functions and estimate in particular the η ′ mass with improved precision. After investigating the strange quark mass dependence and the continuum and chiral extrapolations, we present our results for masses and mixing angle(s) at the physical point. Using chiral perturbation theory we also extract the decay constants f l and f s and use them to estimate the decay widths of η, η ′ → γγ and the transition form factor in the limit of large momentum transfer.

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“…K. O. and C. U. were supported by the BCGS of Physics and Astronomie. The open source software packages tmLQCD [38,39,40], Lemon [41], and R [42] have been used.…”

Section: Discussionmentioning

confidence: 99%