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arXiv 1012.1872hep-phhep-exphysics.ins-det
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中微子工厂的优化,再访

Optimization of the Neutrino Factory, revisited

Sanjib Kumar Agarwalla, Patrick Huber, Jian Tang, Walter Winter

摘要:

我们进行了中微子工厂的基线和能量优化,包括磁化铁探测器(MIND)的最新模拟结果。我们还考虑了tau衰变的影响,产生的nu_mu到nu_tau或nu_e到nu_tau的外观,对质量层次,CP破坏,和theta_{13}发现达到,我们发现是可以忽略不计的考虑检测器。对于小theta_{13}的基线能量优化,我们定性地恢复与早期模拟的MIND检测器的结果。我们发现最佳基线约2500公里至5000公里的CP破坏测量,现在的值E_mu低至约12 GeV可能是可能的。然而,对于大的theta_{13},我们证明了较低的阈值和在较低的能量下重建的背景实际上允许μ子能量低至5 GeV,在相当短的基线,如FNAL-Homestake。这意味着,根据最新的MIND分析,中微子工厂的低能和高能版本只是针对参数空间的不同部分优化的同一实验的两个不同版本。除了更新的探测器性能的绿色领域的研究,我们讨论了具体的实施为两个基线中微子工厂,其中考虑的探测器站点被认为是目前讨论的地下实验室。我们发现,可以找到合理的设置为中微子工厂源在亚洲,欧洲和北美,三角形的存储环是可能的,在所有情况下,仅基于几何参数。

英文摘要:

We perform the baseline and energy optimization of the Neutrino Factory including the latest simulation results on the magnetized iron detector (MIND). We also consider the impact of tau decays, generated by nu_mu to nu_tau or nu_e to nu_tau appearance, on the mass hierarchy, CP violation, and theta_{13} discovery reaches, which we find to be negligible for the considered detector. For the baseline-energy optimization for small theta_{13}, we qualitatively recover the results with earlier simulations of the MIND detector. We find optimal baselines of about 2500 km to 5000 km for the CP violation measurement, where now values of E_mu as low as about 12 GeV may be possible. However, for large theta_{13}, we demonstrate that the lower threshold and the backgrounds reconstructed at lower energies allow in fact for muon energies as low as 5 GeV at considerably shorter baselines, such as FNAL-Homestake. This implies that with the latest MIND analysis, low- and high-energy versions of the Neutrino Factory are just two different versions of the same experiment optimized for different parts of the parameter space. Apart from a green-field study of the updated detector performance, we discuss specific implementations for the two-baseline Neutrino Factory, where the considered detector sites are taken to be currently discussed underground laboratories. We find that reasonable setups can be found for the Neutrino Factory source in Asia, Europe, and North America, and that a triangular-shaped storage ring is possible in all cases based on geometrical arguments only.

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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