Bali, Gunnar S. and Diehl, Markus and Glaessle, Benjamin and Schaefer, Andreas and Zimmermann, Christian (2021) Double parton distributions in the nucleon from lattice QCD. JOURNAL OF HIGH ENERGY PHYSICS (9): 106. ISSN 1029-8479
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We evaluate nucleon four-point functions in the framework of lattice QCD in order to extract the first Mellin moment of double parton distributions (DPDs) in the unpolarized proton. In this first study, we employ an n(f) = 2+1 ensemble with pseudoscalar masses of m(pi) = 355 MeV and m(K) = 441 MeV. The results are converted to the scale mu = 2 GeV. Our calculation includes all Wick contractions, and for almost all of them a good statistical signal is obtained. We analyze the dependence of the DPD Mellin moments on the quark flavor and the quark polarization. Furthermore, the validity of frequently used factorization assumptions is investigated.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CHARGE-DISTRIBUTIONS; HADRON STRUCTURE; SCATTERING; EQUATIONS; PROBE; Lattice field theory simulation; QCD Phenomenology |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Gunnar Bali |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 25 Aug 2022 05:03 |
| Last Modified: | 25 Aug 2022 05:03 |
| URI: | https://pred.uni-regensburg.de/id/eprint/46898 |
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