| dc.contributor | 應物所 | |
| dc.creator (作者) | Hsieh, Ron-Chou;Li, Hsiang-nan | |
| dc.creator (作者) | 李湘楠 | zh_TW |
| dc.date (日期) | 2011-04 | |
| dc.date.accessioned | 24-Aug-2015 15:55:41 (UTC+8) | - |
| dc.date.available | 24-Aug-2015 15:55:41 (UTC+8) | - |
| dc.date.issued (上傳時間) | 24-Aug-2015 15:55:41 (UTC+8) | - |
| dc.identifier.uri (URI) | http://nccur.lib.nccu.edu.tw/handle/140.119/77985 | - |
| dc.description.abstract (摘要) | We include effects of nonlocal quark condensates into QCD sum rules (QSR) via the Källén–Lehmann representation for a dressed fermion propagator, in which a negative spectral density function manifests their nonperturbative nature. Applying our formalism to the pion form factor as an example, QSR results are in good agreement with data for momentum transfer squared up to Q2≈10 GeV2Q2≈10 GeV2. It is observed that the nonlocal quark condensate contribution descends like 1/Q21/Q2, different from the exponential decrease in Q2Q2 obtained in the literature, and contrary to the linear rise in the local-condensate approximation. | |
| dc.format.extent | 533339 bytes | - |
| dc.format.mimetype | application/pdf | - |
| dc.relation (關聯) | Physics Letters B, 698(2), 140-145 | |
| dc.subject (關鍵詞) | QCD sum rules;Nonlocal condensate;Dressed propagator | |
| dc.title (題名) | Nonlocal condensate model for QCD sum rules | |
| dc.type (資料類型) | article | en |
| dc.identifier.doi (DOI) | 10.1016/j.physletb.2011.02.056 | |
| dc.doi.uri (DOI) | http://dx.doi.org/10.1016/j.physletb.2011.02.056 | |
