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22-28 July 2018
Kellogg Hotel and Conference Center
EST timezone

Pion distribution amplitude from Euclidean correlation functions: Universality and higher-twist effects

Jul 25, 2018, 2:40 PM
20m
106 (Kellogg Hotel and Conference Center)

106

Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Hadron Structure Hadron Structure

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)

Presentation Materials