Constraints on disconnected contributions in pi pi scattering
文献类型：期刊论文
| 作者 | Acharya, NR; Guo, FK ; Meissner, UG; Seng, CY
|
| 刊名 | JOURNAL OF HIGH ENERGY PHYSICS
 |
| 出版日期 | 2019 |
| 期号 | 4页码:165 |
| 关键词 | LENGTH |
| ISSN号 | 1029-8479 |
| DOI | 10.1007/JHEP04(2019)165 |
| 英文摘要 | The accuracy of the lattice QCD computation of hadron-hadron scattering at low isospin depends critically on the ability to compute correlation functions with fermionic disconnected Wick contractions. This happens, for instance, in isospin I = 0 pi pi scattering, which receives contributions from rectangular and vacuum types of contractions among other easier calculable ones. Combining Luscher's formula and partially-quenched chiral perturbation theory, we provide precise theory predictions of the discrete energy levels extracted from specific linear combinations of lattice correlation functions corresponding to various types of contractions. Expressions are provided for extracting the unphysical low-energy constants in the partially-quenched chiral perturbation theory from the energy levels for these contractions. The predictions for the rectangular and vacuum contractions may serve as solid tests of the accuracy for existing and future lattice studies of pi pi scattering. |
| 学科主题 | Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/23445]  |
| 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.[Meissner, Ulf-G.] Forschungszentrum Julich, Inst Adv Simulat, Inst Kernphys, D-52425 Julich, Germany 2.[Acharya, N. Ripunjay 3.Meissner, Ulf-G. 4.Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany 5.Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany 6.Chinese Acad Sci, CAS Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China 7.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 8.[Meissner, Ulf-G.] Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany 9.[Meissner, Ulf-G.] Tbilisi State Univ, Tbilisi 0186, Rep of Georgia |
| 推荐引用方式 GB/T 7714 | Acharya, NR,Guo, FK,Meissner, UG,et al. Constraints on disconnected contributions in pi pi scattering[J]. JOURNAL OF HIGH ENERGY PHYSICS,2019(4):165. |
| APA | Acharya, NR,Guo, FK,Meissner, UG,&Seng, CY.(2019).Constraints on disconnected contributions in pi pi scattering.JOURNAL OF HIGH ENERGY PHYSICS(4),165. |
| MLA | Acharya, NR,et al."Constraints on disconnected contributions in pi pi scattering".JOURNAL OF HIGH ENERGY PHYSICS .4(2019):165. |
入库方式： OAI收割
来源：理论物理研究所
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