We report on the status of an ongoing effort by the RQCD and ALPHA Collaborations, aimed at determining leptonic decay constants of charmed mesons. Our analysis is based on large-volume ensembles generated within the CLS effort, employing N_f=2+1 non-perturbatively O(a) improved Wilson quarks, tree-level Symanzik-improved gauge action and open boundary conditions. The ensembles cover lattice spacings from a ~ 0.09 fm to a ~ 0.05 fm, with pion masses varied from 420 to 200 MeV. To extrapolate to the physical masses, we follow both the 2m_l+m_s=const. and the m_s=const. lines in parameter space.
@article{arxiv.1711.08657,
title = {Leptonic decay constants for D-mesons from 3-flavour CLS ensembles},
author = {Sara Collins and Kevin Eckert and Jochen Heitger and Stefan Hofmann and Wolfgang Soeldner},
journal= {arXiv preprint arXiv:1711.08657},
year = {2018}
}
Comments
8 pages including figures and tables, latex2e; Proceedings of the 35th International Symposium on Lattice Field Theory (Lattice 2017), 18-24 June 2017, Granada, Spain