18-24 June 2017
Palacio de Congresos
Europe/Madrid timezone
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Contribution Parallel

Seminarios 6+7
Weak Decays and Matrix Elements

Leptonic decay constants for D-mesons from 3-flavour CLS ensembles

Speakers

  • Mr. Kevin ECKERT

Primary authors

  • Mr. Kevin ECKERT (Institut für Theoretische Physik, Westfälische Wilhelms-Universität Münster)
  • Mr. Stefan HOFMANN (Institut für Theoretische Physik, Universität Regensburg)

Co-authors

Content

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 $\mathcal{O}(a)$ improved Wilson quarks, tree-level Symanzik-improved gauge action and open boundary conditions. The ensembles cover lattice spacings from $a \approx 0.09 \text{fm}$ to $a \approx 0.05 \text{fm}$, with pion masses varied from $420$ to $200 \text{MeV}$. To extrapolate to the physical masses, we follow both the $(2m_l + m_s ) = const.$ and the $m_s = const.$ lines in parameter space.

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Weak Decays and Matrix Elements