Constraints on charm-anticharm asymmetry in the nucleon from lattice QCD
文献类型：期刊论文
| 作者 | Sufian, Raza Sabbir; Liu, Tianbo; Alexandru, Andrei9,10; Brodsky, Stanley J.; de Teramond, Guy F.; Dosch, Hans Guenter6; Draper, Terrence; Liu, Keh-Fei; Yang, Yi-Bo
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| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2020 |
| 卷号 | 808页码:135633 |
| 关键词 | INTRINSIC CHARM CROSS-SECTIONS HEAVY QUARKS FORM-FACTORS COLLISIONS MOMENTUM |
| ISSN号 | 0370-2693 |
| DOI | 10.1016/j.physletb.2020.135633 |
| 英文摘要 | We 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. |
| 学科主题 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27188]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 作者单位 | 1.Int Ctr Theoret Phys Asia Pacific, Beijing, Peoples R China 2.UCAS, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China 3.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 4.Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA 5.Inst Theoret Phys Univ, D-69120 Heidelberg, Germany 6.de Teramond, Guy F.] Univ Costa Rica, Lab Fis Teor & Computat, San Jose 11501, Costa Rica 7.Brodsky, Stanley J.] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94309 USA 8.Univ Maryland, Dept Phys, College Pk, MD 20742 USA 9.George Washington Univ, Dept Phys, Washington, DC 20052 USA 10.Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：理论物理研究所
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