Search for New Particles in High Energy Heavy Ion Collisions

在高能重离子碰撞中寻找新粒子

• 批准号: 05044052
• 负责人: IMAI Kenichi
• 金额: $ 2.88万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05044052/
• 关键词: quark matter; strangelet; quark-gluon plasma; heavy-ion collision; strangeness; newparticle; Hdibaryon; hyper-nuclei; クォーク・グルオンプラズマ; H-ダイバリオン

The purpose of this research is to search for new particles such as strange quark matter (strangelet) in relativistic heavy-ion collisions. We have searched for such particles with small Z/A values in Si+Pt and Au+Pt collisions at about 12 GeV/N at the Brookhaven National Laboratory. The experiment was performed quite successfully. No new particles, however, was observed. We have reached to the highest sensitivity of an order of nb in the production cross section. This result rules out the production of the strangelet through the formation of quark-gluon plasma at this energy. A paper on this result has been already submitted to Phys.Rev.In the same experiment, we have also obtained the production cross sections for pi, K,p, d, t, ^3He, ^4He in Si+Pt and Au+Pt collisions, and the results were published already. That for ^6He and ^8He is under analysis.

这项研究的目的是在相对论重离子碰撞中寻找新的粒子，如奇异夸克物质（奇异夸克）。我们已经在布鲁克海文国家实验室的Si+Pt和Au+Pt碰撞中寻找了这种具有小Z/A值的粒子，能量约为12 GeV/N。实验进行得相当成功。但没有发现新的粒子。我们已经达到了最高的灵敏度的一个订单的铌在生产横截面。这一结果排除了通过在该能量下形成夸克-胶子等离子体而产生奇异子的可能性。在同一实验中，我们还得到了π，K，p，d，t，^3 He，^4 He在Si+Pt和Au+Pt碰撞中的产生截面，并已发表。对于^6 He和^8 He，这一点正在分析中。

项目成果

A.Rusek et al.: "Search for H dibaryon-nucleus bound states in relativistic Au+Pt collisions" submitted to phys.Rev.Lett.

A.Rusek 等人：“在相对论性 Au Pt 碰撞中搜索 H 双重子核束缚态”提交给 phys.Rev.Lett。

N.Saito et al.: "Composite particle production in relativistic Au+Pt, Si+Pt and P+Pt collisions" Physical Review C. 49. 3211-3218 (1994)

N.Saito 等人：“相对论性 Au Pt、Si Pt 和 P Pt 碰撞中复合粒子的产生”《物理评论》C. 49. 3211-3218 (1994)

N.Saito et al.: "Composite particle production in velativistic Au+Pt,Si+Pt and P+Pt collisions" Physical Review C. 49. 3211-3218 (1994)

N.Saito 等人：“相对论 Au Pt、Si Pt 和 P Pt 碰撞中复合粒子的产生”《物理评论》C. 49. 3211-3218 (1994)

A.Rusek et al.: "Search for strangelet in relativistic Au+Pt and Si+Pt collisions" Proceedings of International symposium on Hypernuclear and Strange particle physics.

A.Rusek 等人：“在相对论性 Au Pt 和 Si Pt 碰撞中寻找奇异粒子”超核和奇异粒子物理国际研讨会论文集。

A.Rusek et al.: "Search for H dibaryon-nucleus bound states in relativistic Au+Pt collisions." submitted to Phys.Rev.Lett.

A.Rusek 等人：“在相对论性 Au Pt 碰撞中寻找 H 双重子核束缚态。”