Measurement of the production of charged pions by protons on a tantalum target
Measurement of the production of charged pions by protons on a tantalum target
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测量钽靶上质子产生带电介子的情况
DOI：
10.1140/epjc/s10052-007-0361-0
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
A. Tornero
中科院分区：
文献类型：
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作者：
M. Catanesi;E. Radicioni;R. Edgecock;M. Ellis;S. Robbins;F. Soler;F. Soler;C. Gössling;S. Bunyatov;A. Krasnoperov;B. Popov;V. Serdiouk;V. Tereschenko;E. Capua;G. Vidal;P. Arce;A. Artamonov;A. Artamonov;S. Giani;S. Gilardoni;P. Gorbunov;P. Gorbunov;A. Grant;A. Grossheim;A. Grossheim;P. Gruber;P. Gruber;V. Ivanchenko;V. Ivanchenko;A. Kayis;A. Kayis;J. Panman;I. Papadopoulos;J. Pasternak;E. Tcherniaev;I. Tsukerman;I. Tsukerman;R. Veenhof;C. Wiebusch;C. Wiebusch;P. Zucchelli;A. Blondel;S. Borghi;S. Borghi;M. Campanelli;M. Morone;M. Morone;G. Prior;G. Prior;R. Schroeter;R. Engel;C. Meurer;I. Kato;I. Kato;U. Gastaldi;G. Mills;J. Graulich;J. Graulich;G. Grégoire;M. Kirsanov;M. Bonesini;F. Ferri;M. Paganoni;F. Paleari;A. Bagulya;V. Grichine;N. Polukhina;V. Palladino;L. Coney;D. Schmitz;G. Barr;A. Santo;A. Santo;C. Pattison;K. Zuber;K. Zuber;F. Bobisut;D. Gibin;A. Guglielmi;M. Mezzetto;J. Dumarchez;F. Vannucci;U. Dore;D. Orestano;F. Pastore;A. Tonazzo;L. Tortora;C. Booth;C. Buttar;C. Buttar;P. Hodgson;L. Howlett;M. Bogomilov;M. Chizhov;D. Kolev;R. Tsenov;S. Piperov;P. Temnikov;M. Apollonio;P. Chimenti;G. Giannini;G. Santin;J. Burguet;A. Cervera;J. Gómez;J. Martín;P. Novella;M. Sorel;A. Tornero
本文介绍了在质子-钽碰撞中产生与入射束方向成大角度发射的带电π介子的双微分截面的测量。这些数据是2002年在CERN PS的T9光束线上用HARP探测器拍摄的。π子是由动量范围为3 GeV/c至12 GeV/c的质子束撞击厚度为核相互作用长度5%的钽靶而产生的。实验所涵盖的角动量范围（100 MeV/c ≤p< 800 MeV/c和0.35 rad ≤θ< 2.15 rad）对于中微子工厂的设计特别重要。使用放置在螺线管磁体中的小半径圆柱形时间投影室（TPC）检测所产生的粒子。轨道识别，动量确定和粒子识别都是基于TPC的测量进行的。光束线上的一个精密的探测器系统确保了对入射粒子的识别。给出了四种入射质子束动量（3GeV/c，5GeV/c，8 GeV/c和12 GeV/c）下的双微分截面d2σ/dpdθ的计算结果。此外，在典型的中微子工厂设计的接受范围内的π介子产率被示出为束动量的函数。在一个单一的实验中测量这些产额消除了在不同束流动量下的速率之间以及正负π介子产生之间的比较中的大多数系统误差。
A measurement of the double-differential cross-section for the production of charged pions in proton–tantalum collisions emitted at large angles from the incoming beam direction is presented. The data were taken in 2002 with the HARP detector in the T9 beam line of the CERN PS. The pions were produced by proton beams in a momentum range from 3 GeV/c to 12 GeV/c hitting a tantalum target with a thickness of 5% of a nuclear interaction length. The angular and momentum range covered by the experiment (100 MeV/c ≤p< 800 MeV/c and 0.35 rad ≤θ< 2.15 rad) is of particular importance for the design of a neutrino factory. The produced particles were detected using a small-radius cylindrical time projection chamber (TPC) placed in a solenoidal magnet. Track recognition, momentum determination and particle identification were all performed based on the measurements made with the TPC. An elaborate system of detectors in the beam line ensured the identification of the incident particles. Results are shown for the double-differential cross-sections d2σ/dpdθ at four incident proton beam momenta (3 GeV/c, 5 GeV/c, 8 GeV/c and 12 GeV/c). In addition, the pion yields within the acceptance of typical neutrino factory designs are shown as a function of beam momentum. The measurement of these yields within a single experiment eliminates most systematic errors in the comparison between rates at different beam momenta and between positive and negative pion production.