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At the borderline between exclusive and inclusive physics: Study of Drell-Yan fragments in the PANDA experiment (A preliminary simulation)

机译:在排他性和包容性物理学的边界:研究   paNDa实验中的Drell-Yan碎片(初步模拟)

摘要

Here a preliminary study is presented concerning the detection of thenormally unseen Drell-Yan fragments, possible in the PANDA experiment. To workas a multi-purpose apparatus, this experiment will record all the particlesproduced in the collisions between the antiproton beam and the target, with arather wide acceptance. So detecting Drell-Yan dileptons with or withoutanalyzing the other fragments is just a matter of applying cutoffs in the dataanalysis stage. The distribution of the products of 50,000 typical Drell-Yanevents is here simulateded using a well-known generator code (Pythia-8). Theresulting distributions are inserted within the PANDA acceptance region, toanalyze the chances of missing some searched fragment combinations, or ofconfusing different sets of particles. The most interesting result is that, dueto the reduced phase space, the produced states are much simpler than one couldimagine: (i) almost 50 % of the events just consist of a dilepton plus anucleon-antinucleon pair; (ii) practically all events present anucleon-antinucleon pair; (iii) the number of light particles (photons over aninfrared cutoff and pions) is pretty small. The presented simulations show thatit is possible to study experimentally some, or some aspects, of the mostrelevant final states, with good statistics and precision.
机译:在此提供了有关在PANDA实验中可能检测到的通常看不见的Drell-Yan片段的初步研究。为了用作多功能仪器,该实验将记录反质子束与目标之间的碰撞中产生的所有粒子,并获得广泛的认可。因此,在有或没有分析其他片段的情况下检测Drell-Yan瘦素只是在数据分析阶段应用临界值的问题。使用著名的生成器代码(Pythia-8)模拟了50,000个典型Drell-Yanevents产品的分布。将结果分布插入PANDA接受区域内,以分析丢失某些搜索片段组合或混淆不同粒子集的机会。最有趣的结果是,由于相空间减少,产生的状态比人们想象的要简单得多:(i)几乎50%的事件仅由双核素与核仁-反核素对组成; (ii)实际上所有事件都存在一个核子-反核子对; (iii)轻粒子(红外截止和介子上的光子)的数量非常少。所提供的模拟结果表明,可以以良好的统计数据和精度通过实验研究最相关的最终状态的某些方面。

著录项

  • 作者

    Bianconi, Andrea;

  • 作者单位
  • 年度 2009
  • 总页数
  • 原文格式 PDF
  • 正文语种 {"code":"en","name":"English","id":9}
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