arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1402.6265hep-phhep-ex
收藏

用大气中微子探测磁化铁探测器中的Lorentz和CPT破坏

Probing Lorentz and CPT Violation in a Magnetized Iron Detector using Atmospheric Neutrinos

Animesh Chatterjee, Raj Gandhi, Jyotsna Singh

摘要:

我们研究了印度中微子天文台(INO)的铁量热计(ICAL)对中微子扇区洛伦兹和CPT破坏的灵敏度。它能够识别μ子的电荷以及它们的方向和能量,这使得ICAL成为限制这些基本对称性的有用工具。使用分辨率,效率,误差和不确定性从ICAL探测器模拟,我们确定灵敏度$δ{b}_{31}$,参数化的违反μ子中微子部门。我们进行了计算的三个一般情况下,代表混合的CPT违反部分的哈密顿量,特别是,当混合是1)小,2)大,3)相同的PMNS矩阵。我们发现,对于这两种类型的层次,ICAL在INO应该是敏感的$δ{b}_{31}$ $\gtrsim$ $4\times10^{-23}$ GeV在99% C. L。对于500千吨-年的曝光,除非在CPT违规部门的混合是小的。

英文摘要:

We study the sensitivity of the Iron Calorimeter (ICAL) at the India-Based Neutrino Observatory (INO) to Lorentz and CPT violation in the neutrino sector. Its ability to identify the charge of muons in addition to their direction and energy makes ICAL a useful tool in putting constraints on these fundamental symmetries. Using resolution, efficiencies, errors and uncertainties obtained from ICAL detector simulations, we determine sensitivities to $δ{b}_{31}$, which parametizes the violations in the muon neutrino sector. We carry out calculations for three generic cases representing mixing in the CPT violating part of the hamiltonian, specifically, when the mixing is 1) small, 2) large, 3) the same as that in the PMNS matrix. We find that for both types of hierarchy, ICAL at INO should be sensitive to $δ{b}_{31}$ $\gtrsim$ $4\times10^{-23}$ GeV at 99% C.L. for 500 kt-yr exposure, unless the mixing in the CPT violation sector is small.

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。

↑