Parton distribution functions of Δ+ on the lattice

被引：43

作者：

Chai, Yahui ^{[1
]}

Li, Yuan ^{[1
]}

Xia, Shicheng ^{[1
]}

Alexandrou, Constantia ^{[2
,3
]}

Cichy, Krzysztof ^{[4
]}

Constantinou, Martha ^{[5
]}

Feng, Xu ^{[1
,6
,7
,8
]}

Hadjiyiannakou, Kyriakos ^{[3
]}

Jansen, Karl ^{[9
]}

Koutsou, Giannis ^{[3
]}

Liu, Chuan ^{[1
,6
,7
]}

Scapellato, Aurora ^{[4
]}

Steffens, Fernanda ^{[10
]}

机构：

[1] Peking Univ, Sch Phys, Beijing 100871, Peoples R China

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

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

[4] Adam Mickiewicz Univ, Fac Phys, Ul Uniwersytetu Poznanskiego 2, PL-61614 Poznan, Poland

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

[6] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China

[7] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China

[8] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China

[9] DESY, NIC, Platanenallee 6, D-15738 Zeuthen, Germany

[10] Rheinische Friedrich Wilhelms Univ Bonn, Inst Strahlen & Kernphys, Nussallee 14-16, D-53115 Bonn, Germany

来源：

PHYSICAL REVIEW D | 2020年 / 102卷 / 01期

基金：

欧盟地平线“2020”;

关键词：

NONPERTURBATIVE RENORMALIZATION; QCD;

D O I：

10.1103/PhysRevD.102.014508

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We perform a first calculation for the unpolarized parton distribution function of the Delta(+) baryon using lattice QCD simulations within the framework of large momentum effective theory. Two ensembles of N-f = 2 + 1 + 1 twisted mass fermions are utilized with a pion mass of 270 and 360 MeV, respectively. The baryon, which is treated as a stable single-particle state, is boosted with momentum P-3 with values {0.42, 0.83, 1.25} GeV, and we utilize momentum smearing to improve the signal. The unpolarized parton distribution function of Delta(+) is obtained using a nonperturbative renormalization and a one-loop formula for the matching, with encouraging precision. In particular, we compute the (d) over bar (x) - (u) over bar (x) asymmetry and compare it with the same quantity in the nucleon, in a first attempt towards resolving the physical mechanism responsible for generating such asymmetry.

引用

页数：14

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