标题： 有效场论方法研究\vec{n} + \vec{p} → d + γ在阈值处的反应 显示英文标题

标题： Effective Field Theory Approach To \vec{n} + \vec{p} -> d + γAt Threshold

摘要： 先前，在我们提出的有效场论中，我们已经对大量低能两核性质进行了无参数计算。 目前，在 Institut Laue-Langevin 的实验正在测量极化 np 吸收过程\vec{n}+\vec{p} -> d +\gamma 在阈值处的自旋依赖效应。 注意到该反应的自旋依赖可观测量对高于迄今为止研究的奇次序项敏感，因此我们将有效理论方法扩展到此过程，并对自旋依赖可观测量做出无参数预测。 显示英文摘要

摘要： Previously, in an effective field theory formulated by us, we have carried out parameter-free calculations of a large number of low-energy two-nucleon properties. An experiment at the Institut Laue-Langevin is currently measuring spin-dependent effects in the polarized np capture process \vec{n}+\vec{p} -> d +\gamma at threshold. Noting that spin-dependent observables for this reaction are sensitive to terms of chiral orders higher than hitherto studied, we extend our effective theory approach to this process and make parameter-free predictions on the spin-dependent observables.