Progress in Simulations with Twisted Mass Fermions at the Physical Point

Abdel-Rehim, A.; Wenger, Urs; Alexandrou, C.; Dimopoulos, P.; Frezzotti, R.; Jansen, K.; Kallidonis, C.; Kostrzewa, B.; Mangin-Brinet, M.; Rossi, G.C.; Urbach, C. (2015). Progress in Simulations with Twisted Mass Fermions at the Physical Point. PoS - proceedings of science, LATTICE2014, p. 119. Scuola Internazionale Superiore di Studi Avanzati SISSA

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In this contribution, results from Nf = 2 lattice QCD simulations at one lattice spacing using twisted mass fermions with a clover term at the physical pion mass are presented. The mass splitting between charged and neutral pions (including the disconnected contribution) is shown to be around 20(20) MeV. Further, a first measurement using the clover twisted mass action of the average momentum fraction of the pion is given. Finally, an analysis of pseudoscalar meson masses and decay constants is presented involving linear interpolations in strange and charm quark masses. Matching to meson mass ratios allows the calculation of quark mass ratios: ms=ml = 27:63(13), mc=ml = 339:6(2:2) and mc=ms = 12:29(10). From this mass matching the quantities fK = 153:9(7:5) MeV, fD = 219(11) MeV, fDs = 255(12) MeV and MDs = 1894(93) MeV are determined without the application of finite volume or discretization artefact corrections and with errors dominated by a preliminary estimate of the lattice spacing.

Item Type:

Conference or Workshop Item (Paper)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Wenger, Urs

Subjects:

500 Science > 530 Physics

ISSN:

1824-8039

Publisher:

Scuola Internazionale Superiore di Studi Avanzati SISSA

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

06 May 2016 14:52

Last Modified:

06 May 2016 14:52

BORIS DOI:

10.7892/boris.80345

URI:

https://boris.unibe.ch/id/eprint/80345

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