Results on the disconnected contributions for hadron structure
Constantia Alexandrou, Martha Constantinou, Vincent Drach, Kyriakos, Hadjiyiannakou, Karl Jansen, Giannis Koutsou, Alejandro Vaquero
TL;DR
This paper reports on the calculation of disconnected contributions to hadron structure observables using twisted mass fermions, providing insights into nucleon sigma-terms, axial charge, and parton distribution moments with GPU acceleration.
Contribution
It introduces detailed results on disconnected contributions in hadron structure using $N_F=2+1+1$ twisted mass fermions, including new computations of sigma-terms and parton moments.
Findings
Results for nucleon sigma-terms and isoscalar axial charge.
First moments of bare parton distributions at various pion masses.
Use of GPU-accelerated QUDA code for computations.
Abstract
We present results on the disconnected contributions to three point functions entering in studies of hadron structure. We use twisted mass fermions and give a detailed description on the results of the nucleon {\sigma}-terms, isoscalar axial charge and first moments of bare parton distributions for a range of pions masses. In addition we give the {\sigma}-terms and the computations are performed using QUDA code implemented on GPUs.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · Algorithms and Data Compression