Study of hyperon polarizations and final state interactions in the photo- and electroproduction of kaon

Kaon 光电生产中超子极化和终态相互作用的研究

• 批准号: 12640297
• 负责人: MIYAGAWA Kazuya
• 金额: $ 1.15万
• 依托单位: Okayama University of Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12640297/
• 关键词: hyperon; production of K^+; hyperon-nucleon interaction; ハイペロン,核子相互作用; クォーククラスター模型

The aim of this work is to analyze the reactions(a) γ + d → K^+ + Λ(Σ) + N(b) γ + ^3He → K^+ + Λ(Σ) + N + N(c) e + d → e + K^+ + Λ(Σ) + N(d) e + ^3He → e + K^+ + Λ(Σ) + Nin a unified manner and to obtain the information on the production process of K^+ and the hyperon-nucleon interaction. We analyze especially the reaction (a) for a wide range of outgoing kaon angles and momentum calculating hyperon polarization, asymmetry of photon beam, and double polarizations of beam and recoil hyperon. We find that the cross sections and polarization observables are sensitive to hyperon-nucleon final state interactions around the Λ and Σ thresholds. The double polarization observables C_z is in particular sensitive to the interactions.This work also analyze d(e,e'K^+) reaction, and find the final state interaction effects are visible for appropriate value of momentum transfer Q^2 and outgoing electron angle θ_e.We also investigate how to introduce a quark-cluster model for the hyperon-nucleon interaction into these precise calculations of few-body systems, and succeed to find a way to incorporate the RGM kernels into these calculations.

这项工作的目的是分析反应（a）γ + d→k^ + +λ（σ） + n（b）γ +^3he→k^ + +λ（σ） + n + n + n + n + n（c）e + d→e + k^ + + + + + +λ（σ） + n（σ） + n（d） K^+的生产过程和超核相互作用。我们特别分析了反应（a），以计算多种传出的kaon角度和动量计算超子极化，光子束的不对称性以及束和后坐力超子的双极化。我们发现，横截面和极化可观察物对围绕λ和σ阈值的超核最终状态相互作用敏感。 The double polarization observables C_z is in particular sensitive to the interactions.This work also analyze d(e,e'K^+) reaction, and find the final state interaction effects are visible for appropriate value of momentum Transfer Q^2 and outgoing electron angle θ_e.We also investigate how to introduce a quark-cluster model for the hyperon-nucleon interaction into these precision calculations of few-body systems, and succeeded to find a way to incorporate the RGM内核进入这些计算。

项目成果

Y.Fujiwara., H.Nemura., Y.Suzuki., K.Miyagawa., M.Kohno.: "Three-Cluster Equation Using Two-Cluster RGM Kernel"Prog. Theor. Phys.. 107. 745-757 (2002)

Y.Fujiwara.、H.Nemura.、Y.Suzuki.、K.Miyakawa.、M.Kohno.：“使用二簇 RGM 内核的三簇方程”Prog。

H.Yamamura., K.Miayagawa., and W.Glockle.: "Final-state hyperon-nucleon interaction in the inclusive K^+ photoproduction from the deuteron"Nuclear Physics. A670. 293c-296c (2000)

H.Yamamura.、K.Miayakawa. 和 W.Glockle.：“氘核包含 K^ 光产生中的最终态超子核相互作用”核物理。

H.Yamamura: "Final-state hyperon-nucleon interaction in the inclusive K^+ photoproduction"Nuclear Physics. A670. 293c-296c (2000)

H.Yamamura：“包容性 K^ 光产生中的最终态超子核子相互作用”核物理。

K.Miyagawa: "Electromagnetic K+ Production Light Nuclei with Beam and Hyperon Recoil Polarizationson"Modern Physics Letter A. (発売予定).

K.Miyakawa：“电磁 K+ 产生光核与光束和超子反冲偏振”现代物理快报 A.（待发布）。

W.Glockle: "Antisymmetry in Strangeness -1 and -2 Three-Baryon Systems"Few-Body Systems. 30. 241-258 (2001)

W.Glockle：“奇异-1和-2三重子系统中的反对称性”少体系统。