ITP OpenIR  > SCI期刊论文
Sufian, Raza Sabbir; Liu, Tianbo; Alexandru, Andrei1,2; Brodsky, Stanley J.; de Teramond, Guy F.; Dosch, Hans Guenter5; Draper, Terrence; Liu, Keh-Fei; Yang, Yi-Bo
Constraints on charm-anticharm asymmetry in the nucleon from lattice QCD
Source PublicationPHYSICS LETTERS B
AbstractWe present the first lattice QCD calculation of the charm quark contribution to the nucleon electromagnetic form factors G(E,M)(c)(Q(2)) in the momentum transfer range 0 <= Q(2) <= 1.4 GeV2. The quark mass dependence, finite lattice spacing and volume corrections are taken into account simultaneously based on the calculation on three gauge ensembles including one at the physical pion mass. The nonzero value of the charm magnetic moment mu(c)(M) = -0.00127(38)(stat)(5)(sys), as well as the Pauli form factor, reflects a nontrivial role of the charm sea in the nucleon spin structure. The nonzero G(E)(c)(Q(2)) indicates the existence of a nonvanishing asymmetric charm-anticharm sea in the nucleon. Performing a nonperturbative analysis based on holographic QCD and the generalized Veneziano model, we study the constraints on the [c(x) - (c) over bar (x)] distribution from the lattice QCD results presented here. Our results provide complementary information and motivation for more detailed studies of physical observables that are sensitive to intrinsic charm and for future global analyses of parton distributions including asymmetric charm-anticharm distribution. (C) 2020 The Author(s). Published by Elsevier B.V.
Cooperation Status国际
Subject AreaAstronomy & Astrophysics ; Physics
MOST Discipline CatalogueAstronomy & Astrophysics ; Physics, Nuclear ; Physics, Particles & Fields
Indexed BySCIE
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Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA
2.George Washington Univ, Dept Phys, Washington, DC 20052 USA
3.Univ Maryland, Dept Phys, College Pk, MD 20742 USA
4.Brodsky, Stanley J.] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94309 USA Teramond, Guy F.] Univ Costa Rica, Lab Fis Teor & Computat, San Jose 11501, Costa Rica
6.Inst Theoret Phys Univ, D-69120 Heidelberg, Germany
7.Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA
8.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
9.UCAS, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China
10.Int Ctr Theoret Phys Asia Pacific, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Sufian, Raza Sabbir,Liu, Tianbo,Alexandru, Andrei,et al. Constraints on charm-anticharm asymmetry in the nucleon from lattice QCD[J]. PHYSICS LETTERS B,2020,808:135633.
APA Sufian, Raza Sabbir.,Liu, Tianbo.,Alexandru, Andrei.,Brodsky, Stanley J..,de Teramond, Guy F..,...&Yang, Yi-Bo.(2020).Constraints on charm-anticharm asymmetry in the nucleon from lattice QCD.PHYSICS LETTERS B,808,135633.
MLA Sufian, Raza Sabbir,et al."Constraints on charm-anticharm asymmetry in the nucleon from lattice QCD".PHYSICS LETTERS B 808(2020):135633.
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