PoS - Proceedings of Science
Volume 396 - The 38th International Symposium on Lattice Field Theory (LATTICE2021) - Oral presentation
Nucleon isovector momentum fraction, helicity and transversity moment using Lattice QCD
S. Mondal*, T. Bhattacharya, R. Gupta, B. Joo, H.W. Lin, S. Park, F. Winter and B. Yoon
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Pre-published on: May 16, 2022
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We present our recent high precision calculations [1, 2] of the first moment of nucleon isovector polarized, unpolarized and transversity distributions, i.e., momentum fraction, helicity and transversity moment, respectively. We use the standard method for the calculation of these moments (via matrix elements of twist two operators), and carry out a detailed analysis of the sources of systematic uncertainty, in particular of excited state contributions. Our calculations have been performed using two different lattice setups (Clover-on-HISQ and Clover-on-Clover), each with several ensembles. They give consistent results that are in agreement with global fit analyses.
DOI: https://doi.org/10.22323/1.396.0513
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