Speaker
Ethan Baker
(Haverford College)
Description
Here we present a lattice QCD determination of the first few Mellin moments of the pion distribution amplitude by analyzing the quasi-DA matrix elements using a lattice spacing of $a=0.836 \; \text{fm}$. Our work differs from previous work in that we use domain-wall fermions in order to respect chiral symmetry and that calculations are performed at the physical pion mass. First, we analyze ratios of the pion-pion correlator and the pion-quasiDA correlator to determine the bare matrix elements. We then renormalize these using the double-ratio scheme. Finally, we fit these data using the leading-twist Mellin operator product expansion (OPE) to determine the Mellin moments.
| Topical area | Structure of Hadrons and Nuclei |
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Primary author
Ethan Baker
(Haverford College)