Photoproduction of lambda and sigma(0) hyperons off protons with linearly polarized photons at e-gamma=1.5-3.0 gev
文献类型：期刊论文
| 作者 | Shiu, S. H.1,2; Kohri, H.1,3; Chang, W. C.1; Ahn, D. S.4; Ahn, J. K.5; Chen, J. Y.6; Date, S.7; Ejiri, H.3; Fujimura, H.8; Fujiwara, M.3,9 |
| 刊名 | Physical review c
 |
| 出版日期 | 2018-01-31 |
| 卷号 | 97期号:1页码:10 |
| ISSN号 | 2469-9985 |
| DOI | 10.1103/physrevc.97.015208 |
| 通讯作者 | Shiu, s. h.() |
| 英文摘要 | We report the measurement of the gamma p -> k+lambda and gamma p -> k+sigma(0) reactions at spring-8. the differential cross sections and photon-beam asymmetries are measured at forward k+ production angles using linearly polarized tagged-photon beams in the range of e-gamma = 1.5-3.0 gev. with increasing photon energy, the cross sections for both gamma p -> k+lambda and gamma p -> k+sigma(0) reactions decrease slowly. distinct narrow structures in the production cross section have not been found at e gamma = 1.5-3.0 gev. the forward peaking in the angular distributions of cross sections, a characteristic feature of t-channel exchange, is observed for the production of lambda in the whole observed energy range. a lack of similar feature for sigma(0) production reflects a less dominant role of t-channel contribution in this channel. the photon-beam asymmetries remain positive for both reactions, suggesting the dominance of k* exchange in the t channel. these asymmetries increase gradually with the photon energy, and have a maximum value of +0.6 for both reactions. comparison with theoretical predictions based on the regge trajectory in the t channel and the contributions of nucleon resonances indicates the major role of t-channel contributions as well as non-negligible effects of nucleon resonances in accounting for the reaction mechanism of hyperon photoproduction in this photon energy regime. |
| WOS关键词 | REACTION GAMMA-P ; BARYON RESONANCES ; CROSS-SECTION ; K+ SIGMA(0) ; ENERGIES ; HYDROGEN ; K+LAMBDA ; NUCLEON ; 16-GEV ; KAON |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Nuclear |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000423656700007 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2177933 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Shiu, S. H. |
| 作者单位 | 1.Acad Sinica, Inst Phys, Taipei 11529, Taiwan 2.Natl Cent Univ, Dept Phys, Taoyuan 32001, Taiwan 3.Osaka Univ, Res Ctr Nucl Phys, Ibaraki, Osaka 5670047, Japan 4.RIKEN, Nishina Ctr, 2-1 Hirosawa, Wako, Saitama 3510198, Japan 5.Korea Univ, Dept Phys, Seoul 02841, South Korea 6.Natl Synchrotron Radiat Res Ctr, Light Source Div, Hsinchu 30076, Taiwan 7.Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795143, Japan 8.Wakayama Med Coll, Wakayama 6418509, Japan 9.Natl Inst Quantum & Radiol Sci & Technol, Tokai, Ibaraki 3191195, Japan 10.Univ Connecticut, Dept Phys, Storrs, CT 06269 USA |
| 推荐引用方式 GB/T 7714 | Shiu, S. H.,Kohri, H.,Chang, W. C.,et al. Photoproduction of lambda and sigma(0) hyperons off protons with linearly polarized photons at e-gamma=1.5-3.0 gev[J]. Physical review c,2018,97(1):10. |
| APA | Shiu, S. H..,Kohri, H..,Chang, W. C..,Ahn, D. S..,Ahn, J. K..,...&Yosoi, M..(2018).Photoproduction of lambda and sigma(0) hyperons off protons with linearly polarized photons at e-gamma=1.5-3.0 gev.Physical review c,97(1),10. |
| MLA | Shiu, S. H.,et al."Photoproduction of lambda and sigma(0) hyperons off protons with linearly polarized photons at e-gamma=1.5-3.0 gev".Physical review c 97.1(2018):10. |
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