Lattice calculation of parton distributions

被引：158

作者：

Alexandrou, Constantia ^{[1
,2
]}

Cichy, Krzysztof ^{[3
,4
,5
]}

Drach, Vincent ^{[6
]}

Garcia-Ramos, Elena ^{[3
,7
]}

Hadjiyiannakou, Kyriakos ^{[1
]}

Jansen, Karl ^{[3
]}

Steffens, Fernanda ^{[3
]}

Wiese, Christian ^{[3
]}

机构：

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

[2] Cyprus Inst, CY-2121 Nicosia, Cyprus

[3] DESY, John von Neumann Inst Comp NIC, D-15738 Zeuthen, Germany

[4] Adam Mickiewicz Univ, Fac Phys, PL-61614 Poznan, Poland

[5] Goethe Univ Frankfurt, Inst Theoret Phys, D-60438 Frankfurt, Germany

[6] Univ Southern Denmark, CP3 Origins & DIAS, DK-5230 Odense M, Denmark

[7] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

来源：

PHYSICAL REVIEW D | 2015年 / 92卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

NUCLEON STRUCTURE;

D O I：

10.1103/PhysRevD.92.014502

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on our exploratory study for the direct evaluation of the parton distribution functions from lattice QCD, based on a recently proposed new approach. We present encouraging results using N-f = 2 + 1 + 1 twisted mass fermions with a pion mass of about 370 MeV. The focus of this work is a detailed description of the computation, including the lattice calculation, the matching to an infinite momentum and the nucleon mass correction. In addition, we test the effect of gauge link smearing in the operator to estimate the influence of the Wilson line renormalization, which is yet to be done.

引用

页数：11

共 32 条

[1] Disconnected quark loop contributions to nucleon observables in lattice QCD [J].

Abdel-Rehim, A. ;

Alexandrou, C. ;

Constantinou, M. ;

Drach, V. ;

Hadjiyiannakou, K. ;

Jansen, K. ;

Koutsou, G. ;

Vaquero, A. .

PHYSICAL REVIEW D, 2014, 89 (03)

[2] Parton distribution functions and benchmark cross sections at next-to-next-to-leading order [J].

Alekhin, S. ;

Bluemlein, J. ;

Moch, S. .

PHYSICAL REVIEW D, 2012, 86 (05)

[3] Nucleon structure using lattice QCD [J].

Alexandrou, C. ;

Constantinou, M. ;

Drach, V. ;

Hadjiyiannakou, K. ;

Jansen, K. ;

Kallidonis, C. ;

Koutsou, G. ;

Leontiou, T. ;

Vaquero, A. .

NUOVO CIMENTO C-COLLOQUIA AND COMMUNICATIONS IN PHYSICS, 2013, 36 (05) :111-120

[4] Baryon spectrum with Nf=2+1+1 twisted mass fermions [J].

Alexandrou, C. ;

Drach, V. ;

Jansen, K. ;

Kallidonis, C. ;

Koutsou, G. .

PHYSICAL REVIEW D, 2014, 90 (07)

[5] Evaluation of disconnected quark loops for hadron structure using GPUs [J].

Alexandrou, C. ;

Constantinou, M. ;

Drach, V. ;

Hadjiyiannakou, K. ;

Jansen, K. ;

Koutsou, G. ;

Strelchenko, A. ;

Vaquero, A. .

COMPUTER PHYSICS COMMUNICATIONS, 2014, 185 (05) :1370-1382

[6] Nucleon form factors and moments of generalized parton distributions using Nf=2+1+1 twisted mass fermions [J].

Alexandrou, C. ;

Constantinou, M. ;

Dinter, S. ;

Drach, V. ;

Jansen, K. ;

Kallidonis, C. ;

Koutsou, G. .

PHYSICAL REVIEW D, 2013, 88 (01)

[7] Renormalization constants of local operators for Wilson type improved fermions [J].

Alexandrou, C. ;

Constantinou, M. ;

Korzec, T. ;

Panagopouos, H. ;

Stylianou, F. .

PHYSICAL REVIEW D, 2012, 86 (01)

[8] Evaluation of fermion loops applied to the calculation of the η′ mass and the nucleon scalar and electromagnetic form factors [J].

Alexandrou, C. ;

Hadjiyiannakou, K. ;

Koutsou, G. ;

O'Cais, A. ;

Strelchenko, A. .

COMPUTER PHYSICS COMMUNICATIONS, 2012, 183 (06) :1215-1224

[9] Moments of nucleon generalized parton distributions from lattice QCD [J].

Alexandrou, C. ;

Carbonell, J. ;

Constantinou, M. ;

Harraud, P. A. ;

Guichon, P. ;

Jansen, K. ;

Kallidonis, C. ;

Korzec, T. ;

Papinutto, M. .

PHYSICAL REVIEW D, 2011, 83 (11)

[10] Nucleon electromagnetic form factors in twisted mass lattice QCD [J].

Alexandrou, C. ;

Brinet, M. ;

Carbonell, J. ;

Constantinou, M. ;

Harraud, P. A. ;

Guichon, P. ;

Jansen, K. ;

Korzec, T. ;

Papinutto, M. .

PHYSICAL REVIEW D, 2011, 83 (09)

← 1 2 3 4 →