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arXiv 2212.08138nucl-thnucl-ex
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手征有效场论中氘核上的缪子俘获

Muon capture on the deuteron in chiral effective field theory

Jose Bonilla, Bijaya Acharya, Lucas Platter

AI总结:

该研究在手征有效场论框架下分析缪子-氘核俘获的理论不确定性,量化截断、低能常数和电流展开截断的影响,给出双重态和四重态俘获率的精确估计。

摘要:

我们考虑了缪子在氘核上的俘获。对主导道的不确定性分析对于仔细分析即将到来的实验数据至关重要。我们量化了手征有效场论对缪子-氘核俘获率预测的理论不确定性,这些预测来自末态中相关的中子-中子分波道。我们研究了用于正则化相互作用的截断依赖性、使用不同拟合数据和策略校准的低能常数,以及有效场论对电流展开的截断。结合这些方法,我们估计原子双重态俘获的$Γ^{1/2}_{μd} = 399.1 \pm 7.6 \pm 4.4$ s$^{-1}$,以及四重态俘获的$Γ^{3/2}_{μd} = 12.31 \pm 0.47 \pm 0.04$ s$^{-1}$。

英文摘要:

We consider the capture of a muon on a deuteron. An uncertainty analysis of the dominant channels is important for a careful analysis of forthcoming experimental data. We quantify the theoretical uncertainties of chiral effective-field-theory predictions of the muon-deuteron capture rate from the relevant neutron-neutron partial wave channels in the final state. We study the dependence on the cutoff used to regularize the interactions, low-energy constants calibrated using different fitting data and strategies, and truncation of the effective-field-theory expansion of the currents. Combining these approaches gives as an estimate of $Γ^{1/2}_{μd} = 399.1 \pm 7.6 \pm 4.4$ s$^{-1}$ for capture from the atomic doublet state, and $Γ^{3/2}_{μd} = 12.31 \pm 0.47 \pm 0.04$ s$^{-1}$ for capture from the quartet state.

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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