Flavor decomposition of the nucleon unpolarized, helicity, and transversity parton distribution functions from lattice QCD simulations

被引：32

作者：

Alexandrou, Constantia ^{[1
,2
]}

Constantinou, Martha ^{[3
]}

Hadjiyiannakou, Kyriakos ^{[1
,2
]}

Jansen, Karl ^{[4
]}

Manigrasso, Floriano ^{[1
,5
,6
]}

机构：

[1] Univ Cyprus, Dept Phys, POB 20537, CY-1678 Nicosia, Cyprus

[2] Cyprus Inst, Computat Based Sci & Technol Res Ctr, 20 Kavafi St, CY-2121 Nicosia, Cyprus

[3] Temple Univ, 1925 N 12th St, Philadelphia, PA 19122 USA

[4] DESY, NIC, D-15738 Zeuthen, Germany

[5] Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany

[6] Univ Roma Tor Vergata, Dipartimento Fis, Via Ric Sci 1, I-00133 Rome, Italy

来源：

PHYSICAL REVIEW D | 2021年 / 104卷 / 05期

基金：

美国国家科学基金会;

关键词：

NONPERTURBATIVE RENORMALIZATION; MASS;

D O I：

10.1103/PhysRevD.104.054503

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results on the quark unpolarized, helicity and transversity parton distributions functions of the nucleon. We use the quasiparton distribution approach within the lattice QCD framework and perform the computation using an ensemble of twisted mass fermions with the strange and charm quark masses tuned to approximately their physical values and light quark masses giving pion mass of 260 MeV. We use hierarchical probing to evaluate the disconnected quark loops. We discuss identification of ground state dominance, the Fourier transform procedure and convergence with the momentum boost. We find nonzero results for the disconnected isoscalar and strange quark distributions. The determination of the quark parton distribution and in particular the strange quark contributions that are poorly known provide valuable input to the structure of the nucleon.

引用

页数：28

共 124 条

[11] Low-lying baryon masses using Nf=2 twisted mass clover-improved fermions directly at the physical pion mass [J].