Speaker
Dr
Julien Frison
(DESY ZPPT/NIC)
Description
We present the comparison of preliminary results of $D\to\pi$ semileptonic
decays from two related projects: the first one is based on unitary Wilson
fermions, and the second uses valence quarks rotated to maximal twist.
While these projects differ by their goals and strategies, both studies
are performed on CLS $N_f=2+1$ configurations, with similar analysis
techniques. The universality test can then be used as a non-trivial
validation of our calculations, in particular regarding the notoriously
difficult control of excited state contributions to form factors. Finally,
we will discuss the scaling of these two fermionic actions, compared to
their theoretical merits, with a focus on $O(am_c)$ and $O(ap)$ lattice
artefacts.
Primary authors
Alessandro Conigli
(IFT UAM-CSIC)
Dr
Julien Frison
(DESY ZPPT/NIC)
Carlos Pena
(IFT UAM-CSIC)
Gregorio Herdoiza
(Instituto de Física Teórica UAM-CSIC)
