arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1406.3689hep-phhep-exphysics.ins-det
收藏

结合μ子和强子信息提高INO对中微子参数的灵敏度

Enhancing sensitivity to neutrino parameters at INO combining muon and hadron information

Moon Moon Devi, Tarak Thakore, Sanjib Kumar Agarwalla, Amol Dighe

摘要:

INO的ICAL实验旨在从大气中微子的观测中识别中微子质量等级,并帮助提高大气中微子混合参数的精度。虽然ICAL的设计主要是为了测量μ子动量而优化的,但它也能够测量每个事件中的强子能量。虽然强子能量的测量分辨率相对较低,但它包含了关于事件的关键信息,当与μ子数据一起使用时,可以提取这些信息。我们证明,通过增加强子能量信息的μ子能量和μ子方向在每个事件,ICAL的中微子参数的灵敏度可以显着提高。使用现实的探测器响应ICAL,我们提出了它的增强达到确定中微子质量层次,大气质量平方差和混合角θ 23,包括其八分圆。特别是,我们表明,使用强子能量信息的分析可以区分正常和颠倒的质量等级,在50 kt ICAL下暴露10年,Δ tachi ^[2]约为9,这相当于比仅μ子分析提高了约40%。

英文摘要:

The proposed ICAL experiment at INO aims to identify the neutrino mass hierarchy from observations of atmospheric neutrinos, and help improve the precision on the atmospheric neutrino mixing parameters. While the design of ICAL is primarily optimized to measure muon momentum, it is also capable of measuring the hadron energy in each event. Although the hadron energy is measured with relatively lower resolution, it nevertheless contains crucial information on the event, which may be extracted when taken concomitant with the muon data. We demonstrate that by adding the hadron energy information to the muon energy and muon direction in each event, the sensitivity of ICAL to the neutrino parameters can be improved significantly. Using the realistic detector response for ICAL, we present its enhanced reach for determining the neutrino mass hierarchy, the atmospheric mass squared difference and the mixing angle theta23, including its octant. In particular, we show that the analysis that uses hadron energy information can distinguish the normal and inverted mass hierarchies with Deltachi^2 approx 9 with 10 years exposure at the 50 kt ICAL, which corresponds to about 40% improvement over the muon-only analysis.

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。

↑