Moments of Parton Distributions Functions from Lattice QCD at the Physical Point
Marcel Rodekamp, Michael Engelhardt, Jeremy R. Green, Stefan Krieg,, Stefan Meinel, John W. Negele, Andrew Pochinsky, Sergey Syritsyn
TL;DR
This paper reports a lattice QCD calculation of the second Mellin moments of nucleon PDFs at the physical pion mass, using two lattice spacings and various momenta, with improved operator techniques to reduce excited-state contamination.
Contribution
It introduces a novel lattice QCD approach at the physical point with operator improvements to accurately compute nucleon PDF moments.
Findings
Successful calculation of nucleon PDF moments at physical pion mass
Identification of operators reducing excited-state contamination
Preliminary results demonstrating feasibility of precise lattice measurements
Abstract
We present a Lattice QCD calculation of the second Mellin moments of the nucleon axial, vector and tensor parton distribution functions (PDFs). The calculation is performed at the physical pion mass with two different lattice spacings, and includes both zero and non-zero nucleon momenta. In our preliminary analysis, we identify operators that greatly reduce excited-state contamination.
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