Speaker
Jonas Wilhelm
(Universität Mainz)
Description
We report on our calculation of the strange contribution to the vector and axial vector form factors. The strange charge radii, magnetic moment, and axial charge are extracted by model independent $z$-expansion fits to the $Q^2$-dependence of the respective form factors. Furthermore, the isoscalar contribution to the axial and tensor charge is investigated by combining the calculation of connected and disconnected diagrams. The required renormalization is performed with the Rome-Southampton method. We make use of the CLS $N_f=2+1$ $\mathcal{O}(a)$-improved Wilson fermion ensembles. Results are reported for pion masses in the range $m_\pi=200-360\,\text{MeV}$ and lattice spacings $a=0.05-0.086\,\text{fm}$.
Author
Jonas Wilhelm
(Universität Mainz)
Co-authors
Dr
Dalibor Djukanovic
(Helmholtz-Institut Mainz, Johannes Gutenberg-Universität Mainz)
Dr
Georg Von Hippel
(Cluster of Excellence PRISMA and PRISMA+ & Institut für Kernphysik, Johannes Gutenberg-Universität Mainz)
Prof.
Hartmut Wittig
(Cluster of Excellence PRISMA and PRISMA+ & Institut für Kernphysik & Helmholtz-Institut Mainz, Johannes Gutenberg-Universität Mainz)
Prof.
Harvey B. Meyer
(Cluster of Excellence PRISMA and PRISMA+ & Institut für Kernphysik & Helmholtz-Institut Mainz, Johannes Gutenberg-Universität Mainz)
Dr
Konstantin Ottnad
(Institut für Kernphysik, Johannes Gutenberg-Universität Mainz)
