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arXiv 0902.2105hep-ex
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在CERN PS测量的核靶上入射$π^{\pm}$的带电π介子的前向产生

Forward production of charged pions with incident $π^{\pm}$ on nuclear targets measured at the CERN PS

HARP Collaboration

备注：
to be published on Nuclear Physics A
发表信息：
Nucl.Phys.A821:118-192,2009
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摘要：

本文测量了荷电π介子与铍、碳、铝、铜、锡、钽和铅相互作用中，在动量$0.5 \GeVc \leq p \le 8.0 \GeVc$和角度$0.025 \rad \leq θ\le 0.25 \rad$范围内的双微分$π^{\pm}$产生截面。这些数据代表了第一次系统测量前向π介子强子产生的实验活动。这些数据是在CERN PS的T9光束线上用大接受度HARP探测器采集的。入射粒子，撞击在一个5%的核相互作用长度的目标，确定了一个精心设计的系统的光束探测器。使用HARP探测器的前向光谱仪对产生的粒子进行跟踪和识别。主要在四个入射π介子束动量（3 \GeVc、5 \GeVc、8 \GeVc和12 \GeVc）下获得了双微分截面$ {{\mathrm{d}^2 σ}}/{{\mathrm{d}p\mathrm{d}Ω}} $的结果。并与GEANT 4和MARS蒙特卡罗模拟进行了比较

英文摘要：

Measurements of the double-differential $π^{\pm}$ production cross-section in the range of momentum $0.5 \GeVc \leq p \le 8.0 \GeVc$ and angle $0.025 \rad \leq θ\le 0.25 \rad$ in interactions of charged pions on beryllium, carbon, aluminium, copper, tin, tantalum and lead are presented. These data represent the first experimental campaign to systematically measure forward pion hadroproduction. The data were taken with the large acceptance HARP detector in the T9 beam line of the CERN PS. Incident particles, impinging on a 5% nuclear interaction length target, were identified by an elaborate system of beam detectors. The tracking and identification of the produced particles was performed using the forward spectrometer of the HARP detector. Results are obtained for the double-differential cross-sections $ {{\mathrm{d}^2 σ}}/{{\mathrm{d}p\mathrm{d}Ω}} $ mainly at four incident pion beam momenta (3 \GeVc, 5 \GeVc, 8 \GeVc and 12 \GeVc). The measurements are compared with the GEANT4 and MARS Monte Carlo simulation

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