First observations of separated atmospheric nu(mu) and (nu)over-bar(mu) events in the MINOS detector
文献类型：期刊论文
| 作者 | MINOS Collaboration |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2006 |
| 卷号 | 73期号:7 |
| 关键词 | TOTAL CROSS-SECTION GEV ENERGY-RANGE NEUTRINO FLUX SUPER-KAMIOKANDE UNIFIED APPROACH SYSTEM MUONS RATIO SCATTERING PROTONS |
| 通讯作者 | Adamson, P (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. |
| 英文摘要 | The complete 5.4 kton MINOS far detector has been taking data since the beginning of August 2003 at a depth of 2070 meters water-equivalent in the Soudan mine, Minnesota. This paper presents the first MINOS observations of nu(mu) and (nu) over bar (mu) charged-current atmospheric neutrino interactions based on an exposure of 418 days. The ratio of upward- to downward-going events in the data is compared to the Monte Carlo expectation in the absence of neutrino oscillations, giving R(up/down)(data)/R(up/down)(MC)=0.62(-0.14)(+0.19)(stat.)+/- 0.02(sys.). An extended maximum likelihood analysis of the observed L/E distributions excludes the null hypothesis of no neutrino oscillations at the 98% confidence level. Using the curvature of the observed muons in the 1.3 T MINOS magnetic field nu(mu) and (nu) over bar (mu) interactions are separated. The ratio of (nu) over bar (mu) to nu(mu) events in the data is compared to the Monte Carlo expectation assuming neutrinos and antineutrinos oscillate in the same manner, giving R((nu) over bar mu)/nu(data)(mu)/R((nu) over bar mu)/nu(MC)(mu)=0.96(-0.27)(+0.38)(stat.)+/- 0.15(sys.), where the errors are the statistical and systematic uncertainties. Although the statistics are limited, this is the first direct observation of atmospheric neutrino interactions separately for nu(mu) and (nu) over bar (mu). |
| 学科主题 | Astronomy & Astrophysics; Physics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000237158500008 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212658]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | MINOS Collaboration. First observations of separated atmospheric nu(mu) and (nu)over-bar(mu) events in the MINOS detector[J]. PHYSICAL REVIEW D,2006,73(7). |
| APA | MINOS Collaboration.(2006).First observations of separated atmospheric nu(mu) and (nu)over-bar(mu) events in the MINOS detector.PHYSICAL REVIEW D,73(7). |
| MLA | MINOS Collaboration."First observations of separated atmospheric nu(mu) and (nu)over-bar(mu) events in the MINOS detector".PHYSICAL REVIEW D 73.7(2006). |
入库方式： OAI收割
来源：高能物理研究所
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