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arXiv 1808.04263hep-ph
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DUNE和T2HKK的非标准相互作用及标准参数简并性研究展望

Non-Standard Interactions and Prospects for Studying Standard Parameter Degeneracies in DUNE and T2HKK

Surender Verma, Shankita Bhardwaj

摘要:

未来的长基线实验如DUNE和T2 HKK在确定中微子质量等级和测量标准$CP$相$δ$方面具有很好的前景。然而,中微子与物质的可能的非标准相互作用的存在可能会使这一图景复杂化,这也是本工作的主题。利用DUNE和T2HKK实验研究了非标准相互作用(NSI)下的标准参数简并。我们检查质量层级简并性,假设(i)所有NSI参数为非零,以及(ii)一个NSI参数($ε_{eμ}$)及其相应的$CP$相位($δ_{eμ}$)为非零。我们发现,后者的情况下是更合适的解决质量层次简并与DUNE和T2HKK实验由于相对较小的不确定性,从NSI部门。我们还分别研究了中微子模式($ν_μ\rightarrowν_{e}$)和反中微子模式($\barν_μ\rightarrow\barν_{e}$)的八弦简并度。我们发现,要解决这种简并,中微子和反中微子模式相结合的长基线实验是必要的。此外,我们还考虑了DUNE与T2 HKK实验相结合来研究由于标准($δ$)和非标准($δ_{eμ}$)$CP$相引起的$CP$相简并。我们发现,DUNE和T2 HKK,在一起,有更多的敏感性$CP$违反效果(10 $σ$为真正的NH和8.2 $σ$为真正的IH)。

英文摘要:

The future long baseline experiments such as DUNE and T2HKK have promising prospects to determine the neutrino mass hierarchy and measuring standard $CP$ phase $δ$. However, presence of possible non-standard interactions of neutrinos with matter may intricate this picture and is the subject matter of the present work. We have studied the standard parameter degeneracies in presence of non-standard interactions(NSI) with DUNE and T2HKK experiments. We examine the mass hierarchy degeneracy assuming (i) all NSI parameters to be non-zero and (ii) one NSI parameter($ε_{eμ}$) and its corresponding $CP$ phase($δ_{eμ}$) to be non-zero. We find that the later case is more appropriate to resolve mass hierarchy degeneracy with DUNE and T2HKK experiments due to relatively small uncertainties emanating from the NSI sector. We have, also, investigated the octant degeneracy with neutrino($ν_μ\rightarrowν_{e}$) and antineutrino($\barν_μ\rightarrow\barν_{e}$) mode separately. We find that to resolve this degeneracy the long baseline experiment with combination of neutrino and antineutrino mode is essential. Furthermore, we have considered DUNE in conjunction with T2HKK experiment to study $CP$ phase degeneracy due to standard($δ$) and non-standard($δ_{eμ}$) $CP$ phases. We find that DUNE and T2HKK, in conjunction, has more sensitivity for $CP$ violation effects(10$σ$ for true NH and 8.2$σ$ for true IH).

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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