Progress in Simulations with Twisted Mass Fermions at the Physical Point
Abstract
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: μs/μl=27.63(13), μc/μl=339.6(2.2) and μc/μs=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.
Turn this paper into a lesson
ArcXiv compiles a structured reading guide from this paper's metadata: plain-English importance, contributions, prerequisite concepts, which sections to read first, flashcards, and a quiz. Grounded in the abstract, never invented.