Measurements of Atmospheric Neutrinos and Antineutrinos in the MINOS Far Detector

Measurements of Atmospheric Neutrinos and Antineutrinos in the MINOS Far Detector
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DOI：
10.1103/physrevd.86.052007
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发表时间：
2012-08
期刊：
Physical Review D
影响因子：
5
通讯作者：
P. Adamson;C. Backhouse;G. Barr;M. Bishai;A. Blake;G. Bock;D. Boehnlein;D. Bogert;S. Cao;J. Chapman;S. Childress;J. Coelho;L. Corwin;D. Cronin-Hennessy;I. Dankó;J. D. Jong;N. Devenish;M. Diwan;C. Escobar;J. Evans;E. Falk;G. Feldman;M. Frohne;H. Gallagher;R. Gomes;M. Goodman;P. Gouffon;N. Graf;R. Gran;K. Grzelak;A. Habig;J. Hartnell;R. Hatcher;A. Himmel;A. Holin;J. Hylen;G. Irwin;Z. Isvan;D. Jaffe;C. James;D. Jensen;T. Kafka;S. Amcix;G. Koizumi;S. Kopp;M. Kordosky;A. Kreymer;K. Lang;P. Litchfield;L. Loiacono;P. Lucas;W. A. Mann;M. Marshak;M. Mathis;N. Mayer;N. Mayer;M. M. Medeiros-M.;R. Mehdiyev;J. Meier;M. Messier;W. Miller;S. Mishra;J. Mitchell;C. Moore;L. Mualem;S. Mufson;J. Musser;D. Naples;J. Nelson;H. Newman;R. Nichol;J. Nowak;W. Oliver;M. Orchanian;R. Pahlka;J. Paley;R. Patterson;G. Pawloski;S. Phan-Budd;R. Plunkett;X. Qiu;A. Radovic;J. Ratchford;B. Rebel;C. Rosenfeld;H. Rubin;M. Sánchez;M. Sánchez;J. Schneps;A. Schreckenberger;P. Schreiner;R. Sharma;A. Sousa;B. Speakman;M. Strait;N. Tagg;R. Talaga;J. Thomas;M. Thomson;R. Toner;R. Toner;D. Torretta;G. Tzanakos;J. Urheim;P. Vahle;B. Viren;J. Walding;A. Weber;A. Weber;R. Webb;C. White;L. Whitehead;L. Whitehead;S. Wojcicki;K. Zhang;R. Zwaska
P. Adamson;C. Backhouse;G. Barr;M. Bishai;A. Blake;G. Bock;D. Boehnlein;D. Bogert;S. Cao;J. Chapman;S. Childress;J. Coelho;L. Corwin;D. Cronin-Hennessy;I. Dankó;J. D. Jong;N. Devenish;M. Diwan;C. Escobar;J. Evans;E. Falk;G. Feldman;M. Frohne;H. Gallagher;R. Gomes;M. Goodman;P. Gouffon;N. Graf;R. Gran;K. Grzelak;A. Habig;J. Hartnell;R. Hatcher;A. Himmel;A. Holin;J. Hylen;G. Irwin;Z. Isvan;D. Jaffe;C. James;D. Jensen;T. Kafka;S. Amcix;G. Koizumi;S. Kopp;M. Kordosky;A. Kreymer;K. Lang;P. Litchfield;L. Loiacono;P. Lucas;W. A. Mann;M. Marshak;M. Mathis;N. Mayer;N. Mayer;M. M. Medeiros-M.;R. Mehdiyev;J. Meier;M. Messier;W. Miller;S. Mishra;J. Mitchell;C. Moore;L. Mualem;S. Mufson;J. Musser;D. Naples;J. Nelson;H. Newman;R. Nichol;J. Nowak;W. Oliver;M. Orchanian;R. Pahlka;J. Paley;R. Patterson;G. Pawloski;S. Phan-Budd;R. Plunkett;X. Qiu;A. Radovic;J. Ratchford;B. Rebel;C. Rosenfeld;H. Rubin;M. Sánchez;M. Sánchez;J. Schneps;A. Schreckenberger;P. Schreiner;R. Sharma;A. Sousa;B. Speakman;M. Strait;N. Tagg;R. Talaga;J. Thomas;M. Thomson;R. Toner;R. Toner;D. Torretta;G. Tzanakos;J. Urheim;P. Vahle;B. Viren;J. Walding;A. Weber;A. Weber;R. Webb;C. White;L. Whitehead;L. Whitehead;S. Wojcicki;K. Zhang;R. Zwaska
中科院分区：
物理与天体物理2区
文献类型：
--
作者：
P. Adamson;C. Backhouse;G. Barr;M. Bishai;A. Blake;G. Bock;D. Boehnlein;D. Bogert;S. Cao;J. Chapman;S. Childress;J. Coelho;L. Corwin;D. Cronin-Hennessy;I. Dankó;J. D. Jong;N. Devenish;M. Diwan;C. Escobar;J. Evans;E. Falk;G. Feldman;M. Frohne;H. Gallagher;R. Gomes;M. Goodman;P. Gouffon;N. Graf;R. Gran;K. Grzelak;A. Habig;J. Hartnell;R. Hatcher;A. Himmel;A. Holin;J. Hylen;G. Irwin;Z. Isvan;D. Jaffe;C. James;D. Jensen;T. Kafka;S. Amcix;G. Koizumi;S. Kopp;M. Kordosky;A. Kreymer;K. Lang;P. Litchfield;L. Loiacono;P. Lucas;W. A. Mann;M. Marshak;M. Mathis;N. Mayer;N. Mayer;M. M. Medeiros-M.;R. Mehdiyev;J. Meier;M. Messier;W. Miller;S. Mishra;J. Mitchell;C. Moore;L. Mualem;S. Mufson;J. Musser;D. Naples;J. Nelson;H. Newman;R. Nichol;J. Nowak;W. Oliver;M. Orchanian;R. Pahlka;J. Paley;R. Patterson;G. Pawloski;S. Phan-Budd;R. Plunkett;X. Qiu;A. Radovic;J. Ratchford;B. Rebel;C. Rosenfeld;H. Rubin;M. Sánchez;M. Sánchez;J. Schneps;A. Schreckenberger;P. Schreiner;R. Sharma;A. Sousa;B. Speakman;M. Strait;N. Tagg;R. Talaga;J. Thomas;M. Thomson;R. Toner;R. Toner;D. Torretta;G. Tzanakos;J. Urheim;P. Vahle;B. Viren;J. Walding;A. Weber;A. Weber;R. Webb;C. White;L. Whitehead;L. Whitehead;S. Wojcicki;K. Zhang;R. Zwaska

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本文报道了MINOS远探测器上的大气中微子和反中微子相互作用的测量结果，基于2553活天（37.9千吨年）的数据。总共观察到2072个候选事件。这些粒子被分成905个包含顶点的μ子和466个中微子诱导的岩石μ子，它们都是由带电电流v_µ和v <$_µ相互作用产生的，还有701个包含顶点的簇射，主要由带电电流v_e和v <$_e相互作用以及中性电流相互作用组成。MINOS远探测器磁场中μ子轨迹的曲率用于选择v_µ和v <$_µ事件的单独样本。将观测到的v <$µ与v <$µ事件的比值与蒙特卡罗（MC）模拟结果进行了比较，得到了（R^（data）_（v <$/v））/（R^（MC）_（v <$/v））= 1.03 ± 0.08（stat）± 0.08（syst）的双比值。根据重建的每个事件的能量和方向，v_µ和v <$_µ数据被分成L/E分辨率的bin，并使用与观测到的L/E分布的最大似然拟合来确定大气中微子振荡参数。此拟合返回以下90%置信限：|Δm^2| =（1.9 ± 0.4）x 10^（-3）eV^2且sin^（2）2θ > 0.86。该拟合被扩展为包含单独的v_µ和v ¨_µ振荡参数，返回90%的置信限|Δm^2|-|Δm <$^2| = 0.6^（2.4）_（-0.8）x 10^（-3）eV^2，中微子和反中微子的平方质量分裂之差。
This paper reports measurements of atmospheric neutrino and antineutrino interactions in the MINOS Far Detector, based on 2553 live-days (37.9 kton-years) of data. A total of 2072 candidate events are observed. These are separated into 905 contained-vertex muons and 466 neutrino-induced rock-muons, both produced by charged-current v_µ and v¯_µ interactions, and 701 contained-vertex showers, composed mainly of charged-current v_e and v¯_e interactions and neutral-current interactions. The curvature of muon tracks in the magnetic field of the MINOS Far Detector is used to select separate samples of v_µ and v¯_µ events. The observed ration of v¯_µ to v_µ events is compared with the Monte Carlo (MC) simulation, giving a double ration of (R^(data)_(v¯/v))/(R^(MC)_(v¯/v)) = 1.03 ± 0.08(stat) ± 0.08(syst). The v_µ and v¯_µ data are separated into bins of L/E resolution, based on the reconstructed energy and direction of each event, and a maximum likelihood fit to the observed L/E distributions is used to determine the atmospheric neutrino oscillation parameters. This fit returns 90% confidence limits of |Δm^2| = (1.9 ± 0.4) x 10^(-3) eV^2 and sin^(2)2θ > 0.86. The fit is extended to incorporate separate v_µ and v¯_µ oscillation parameters, returning 90% confidence limits of |Δm^2|-|Δm¯^2| = 0.6^(2.4)_(-0.8) x 10^(-3) eV^2 on the difference between the squared-mass splittings for neutrinos and antineutrinos.