Collaborative Research: PP2PP, a Comprehensive Elastic proton-proton Scattering Experiment at RHIC

合作研究：PP2PP，RHIC 的综合弹性质子-质子散射实验

• 批准号: 0099686
• 负责人: Michael Rijssenbeek
• 金额: $ 16.5万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-01 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0099686&HistoricalAwards=false
• 关键词: Collaborative; Research; PP2PP; Comprehensive; Elastic

The award covers graduate student and undergraduate student researchwith the PP2PP experiment at the Relativistic Heavy Ion Collider atthe Brookhaven National Laboratory. The goal of the internationalPP2PP collaboration is the comprehensive measurement ofproton-proton elastic scattering, eventually covering a wide, andunexplored, domain in energy (from 50 to 500 GeV) and momentumtransfer (from 0.006 GeV^2 to 1.3 GeV^2) within a single experiment.The first data run with polarized proton beams will take place inthe Fall 2001. Two Roman pot detector stations will be used, one ineach arm. Two more stations plus central tracking will be added infollowing years. With the experiment and by comparing with existingantiproton-proton elastic scattering data, the helicity structure ofthe long-distance pp interaction will be investigated, the exchangemechanisms will be studied and connected to QCD calculations ofmulti-gluon exchanges. The intriguing dip structure in pp elasticscattering will be accessible with high statistics. At very smallmomentum transfers PP2PP will measure absolute cross sections andthe details of the forward scattering amplitude. Beyond 2003, aspecial tune of the RHIC machine will allow the lowest accessiblemomentum transfer to reach into the Coulomb regime. The small scaleof the PP2PP experiment makes it ideally suited for participation byundergraduate students in all aspects of construction, data taking,and data analysis.

该奖项涵盖布鲁克海文国家实验室相对论重离子对撞机上的 PP2PP 实验的研究生和本科生研究。国际 PP2PP 合作的目标是全面测量质子-质子弹性散射，最终在一次实验中覆盖广泛且未经探索的能量（从 50 到 500 GeV）和动量传递（从 0.006 GeV^2 到 1.3 GeV^2）领域。第一个使用偏振质子束的数据运行将于 2001 年秋季进行。将使用两个罗马罐探测器站，每个探测器站一个 手臂。未来几年将再增加两个站和中央跟踪站。通过实验并与现有的反质子-质子弹性散射数据进行比较，研究长距离pp相互作用的螺旋结构，研究交换机制并与多胶子交换的QCD计算联系起来。 pp 弹性散射中有趣的倾角结构将可以通过高统计数据获得。在非常小的动量传递下，PP2PP 将测量绝对横截面和前向散射幅度的细节。 2003 年以后，RHIC 机器的特殊调整将允许最低的动量转移达到库仑状态。 PP2PP实验规模较小，非常适合本科生参与构建、数据获取和数据分析的各个方面。