Measurement of the atmospheric muon charge ratio with the OPERA detector
Measurement of the atmospheric muon charge ratio with the OPERA detector
复制标题
使用 OPERA 探测器测量大气 μ 子电荷比
DOI：
10.1140/epjc/s10052-010-1284-8
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
R. Zimmermann
中科院分区：
文献类型：
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作者：
N. Agafonova;A. Anokhina;S. Aoki;A. Ariga;T. Ariga;D. Autiero;A. Badertscher;A. Bagulya;A. Bertolin;M. Besnier;D. Bick;V. Boyarkin;C. Bozza;T. Brugière;R. Brugnera;G. Brunetti;S. Buontempo;A. Cazes;L. Chaussard;M. Chernyavsky;V. Chiarella;N. Chon;A. Chukanov;M. Cozzi;G. D’Amato;F. Corso;N. D’Ambrosio;G. Lellis;Y. Déclais;M. Serio;F. Capua;D. Ferdinando;A. Giovanni;N. Marco;S. Dmitrievski;M. Dracos;D. Duchesneau;S. Dusini;J. Ebert;O. Egorov;R. Enikeev;A. Ereditato;L. Esposito;J. Favier;G. Felici;T. Ferber;R. Fini;D. Frekers;T. Fukuda;C. Fukushima;V. Galkin;A. Garfagnini;G. Giacomelli;M. Giorgini;C. Goellnitz;J. Goldberg;D. Golubkov;L. Goncharova;Y. Gornushkin;G. Grella;F. Grianti;M. Guler;C. Gustavino;C. Hagner;K. Hamada;T. Hara;M. Hierholzer;K. Hoshino;M. Ieva;K. Jakovčić;C. Jollet;F. Juget;M. Kazuyama;S. Kim;M. Kimura;B. Kliček;J. Knuesel;K. Kodama;M. Komatsu;U. Kose;I. Kreslo;H. Kubota;C. Lazzaro;J. Lenkeit;A. Ljubičić;A. Longhin;G. Lutter;A. Malgin;G. Mandrioli;A. Marotta;J. Marteau;T. Matsuo;V. Matveev;N. Mauri;E. Medinaceli;F. Meisel;A. Meregaglia;P. Migliozzi;S. Mikado;S. Miyamoto;P. Monacelli;K. Morishima;U. Moser;M. Muciaccia;N. Naganawa;T. Naka;M. Nakamura;T. Nakano;D. Naumov;V. Nikitina;K. Niwa;Y. Nonoyama;S. Ogawa;A. Olchevski;C. Oldorf;G. Orlova;V. Osedlo;M. Paniccia;A. Paoloni;B. Park;I. G. Park;A. Pastore;L. Patrizii;E. Pennacchio;H. Pessard;V. Pilipenko;C. Pistillo;G. Policastro;N. Polukhina;M. Pozzato;K. Pretzl;P. Publichenko;F. Pupilli;R. Rescigno;T. Roganova;H. Rokujo;G. Romano;G. Rosa;I. Rostovtseva;A. Rubbia;A. Russo;V. Ryasny;O. Ryazhskaya;O. Sato;Y. Sato;A. Schembri;W. Parzefall;H. Schroeder;L. Lavina;A. Sheshukov;H. Shibuya;S. Simone;M. Sioli;C. Sirignano;G. Sirri;J. Song;M. Spinetti;L. Stanco;N. Starkov;M. Stipčević;T. Strauss;P. Strolin;S. Takahashi;M. Tenti;F. Terranova;I. Tezuka;V. Tioukov;P. Tolun;T. Tran;S. Tufanli;P. Vilain;M. Vladimirov;L. Votano;J. Vuilleumier;G. Wilquet;B. Wonsak;V. Yakushev;C. Yoon;T. Yoshioka;J. Yoshida;Y. Zaitsev;S. Zemskova;A. Zghiche;R. Zimmermann
利用位于Gran Sasso地下实验室（LNGS）的OPERA探测器测量了TeV能区大气μ子电荷比R =N +/N-。我们分析了403069大气μ子对应的113.4天的寿命在2008年CNGS运行。我们分别计算了单个和多个μ子事件的μ子电荷比，以选择初级宇宙线谱的不同能量区域，并测试Rμ对初级成分的依赖性。考虑到电荷错误识别误差，对测量的Rμ值进行了校正。数据还被分组为“垂直表面能”的五个箱μcos θ。通过拟合大气中产生μ介子的简化模型，可以确定由宇宙射线能谱加权的π介子和K介子电荷比。
The OPERA detector at the Gran Sasso underground laboratory (LNGS) was used to measure the atmospheric muon charge ratio $R_{\mu}=N_{\mu^{+}}/N_{\mu^{-}}$ in the TeV energy region. We analyzed 403069 atmospheric muons corresponding to 113.4 days of livetime during the 2008 CNGS run. We computed separately the muon charge ratio for single and for multiple muon events in order to select different energy regions of the primary cosmic ray spectrum and to test the Rμ dependence on the primary composition. The measured Rμ values were corrected taking into account the charge-misidentification errors. Data have also been grouped in five bins of the “vertical surface energy” ℰμcos θ. A fit to a simplified model of muon production in the atmosphere allowed the determination of the pion and kaon charge ratios weighted by the cosmic ray energy spectrum.