Speaker
Dr
Philipp Wein
(Universität Regensburg)
Description
We study the feasibility to extract the leading twist pion distribution amplitude (DA) and the higher twist normalization constant from suitably chosen Euclidean correlation functions with two local currents at a spacelike separation. We demonstrate the advantages of considering several correlation functions simultaneously and extracting the pion DA from a global fit. This position space approach is complementary to the calculation of the lowest moments of the DA using the Wilson operator product expansion and avoids mixing with lower dimensional local operators on the lattice. We will highlight similarities and differences to closely related methods that use quasi- or pseudo-distributions.
Primary authors
Prof.
Andreas Schäfer
(Universität Regensburg)
Dr
Benjamin Gläßle
(Universität Regensburg)
Dr
Fabian Hutzler
(Universität Regensburg)
Prof.
Gunnar Bali
(University Regensburg)
Dr
Jianhui Zhang
(University of Regensburg)
Dr
Meinulf Göckeler
(Universität Regensburg)
Dr
Michael Gruber
(Universität Regensburg)
Dr
Philipp Wein
(Universität Regensburg)
Prof.
Vladimir Braun
(Universität Regensburg)