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arXiv 0907.1428hep-ex
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π介子束入射核靶大角度产生带电π介子

Large-angle production of charged pions with incident pion beams on nuclear targets

The HARP Collaboration, M. Apollonio, A. Artamonov, A. Bagulya, G. Barr, A. Blondel, F. Bobisut, M. Bogomilov, M. Bonesini, C. Booth, S. Borghi, S. Bunyatov, J.… 展开作者

The HARP Collaboration, M. Apollonio, A. Artamonov, A. Bagulya, G. Barr, A. Blondel, F. Bobisut, M. Bogomilov, M. Bonesini, C. Booth, S. Borghi, S. Bunyatov, J. Burguet-Castell, M. G. Catanesi, A. Cervera-Villanueva, P. Chimenti, L. Coney, E. Di Capua, U. Dore, J. Dumarchez, R. Edgecock, M. Ellis, F. Ferri, U. Gastaldi, S. Giani, G. Giannini, D. Gibin, S. Gilardoni, P. Gorbunov, C. Goessling, J. J. Gomez-Cadenas, A. Grant, J. S. Graulich, G. Gregoire, V. Grichine, A. Grossheim, A. Guglielmi, L. Howlett, A. Ivanchenko, V. Ivanchenko, A. Kayis-Topaksu, M. Kirsanov, D. Kolev, A. Krasnoperov, J. Martin-Albo, C. Meurer, M. Mezzetto, G. B. Mills, M. C. Morone, P. Novella, D. Orestano, V. Palladino, J. Panman, I. Papadopoulos, F. Pastore, S. Piperov, N. Polukhina, B. Popov, G. Prior, E. Radicioni, D. Schmitz, R. Schroeter, G. Skoro, M. Sorel, E. Tcherniaev, P. Temnikov, V. Tereschenko, A. Tonazzo, L. Tortora, R. Tsenov, I. Tsukerman, G. Vidal-Sitjes, C. Wiebusch, P. Zucchelli

摘要:

本文介绍了在动量为100 MeV/c <= p <= 800 MeV/c,入射角为0.35 rad <= theta <= 2.15 rad的范围内,用π ~(+/-)电子束入射铍、铝、碳、铜、锡、钽和铅靶,测量π ~(+/-)产生的双微分截面。这些数据是用欧洲核子研究中心质子同步加速器T9光束线上的大接受度HARP探测器采集的。次级π介子是由动量范围从3 GeV/c到12.9 GeV/c的光束撞击厚度为核相互作用长度的5%的固体靶产生的。使用放置在螺线管磁体内的小半径圆柱形时间投影室(TPC)对产生的颗粒进行跟踪和识别。入射粒子被一个精密的光束探测器系统识别出来。结果得到的双微分截面d2西格玛/dpdtheta在六个入射光束动量。在3 GeV/c,5 GeV/c,8 GeV/c和12 GeV/c的数据可用于所有目标,而在8.9 GeV/c和12.9 GeV/c的额外数据分别在正粒子束Be和Al目标。测量结果与GEANT 4和MARS蒙特卡罗模拟的几个发生器进行了比较。

英文摘要:

Measurements of the double-differential pi+/- production cross-section in the range of momentum 100 MeV/c <= p <= 800 MeV/c and angle 0.35 rad <= theta <= 2.15 rad using pi+/- beams incident on beryllium, aluminium, carbon, copper, tin, tantalum and lead targets are presented. The data were taken with the large acceptance HARP detector in the T9 beam line of the CERN Proton Synchrotron. The secondary pions were produced by beams in a momentum range from 3 GeV/c to 12.9 GeV/c hitting a solid target with a thickness of 5% of a nuclear interaction length. The tracking and identification of the produced particles was performed using a small-radius cylindrical time projection chamber (TPC) placed inside a solenoidal magnet. Incident particles were identified by an elaborate system of beam detectors. Results are obtained for the double-differential cross-sections d2sigma/dpdtheta at six incident beam momenta. Data at 3 GeV/c, 5 GeV/c, 8 GeV/c, and 12 GeV/c are available for all targets while additional data at 8.9 GeV/c and 12.9 GeV/c were taken in positive particle beams on Be and Al targets, respectively. The measurements are compared with several generators of GEANT4 and the MARS Monte Carlo simulation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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