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arXiv 1302.4158nucl-thcond-mat.quant-gashep-lathep-ph
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格点有效场论中的辐射俘获反应

Radiative capture reactions in lattice effective field theory

Gautam Rupak, Dean Lee

摘要:

我们概述了一种计算晶格上的核俘获反应的一般方法。该方法包括两个主要部分。在这项研究中,我们详细介绍了第二部分,其中包括计算一个有效的两体捕获反应的晶格在有限体积。我们解决了这个问题,通过计算两点格林函数使用红外调节器和捕获振幅的两体束缚态。我们证明了这种方法的细节,通过计算在晶格上的领先的M1贡献的辐射中子俘获质子在低能量下使用无介子有效场论。我们发现很好的协议与精确连续的结果。

英文摘要:

We outline a general method for computing nuclear capture reactions on the lattice. The method consists of two major parts. In this study we detail the second part which consists of calculating an effective two-body capture reaction on the lattice at finite volume. We solve this problem by calculating the two-point Green's function using an infrared regulator and the capture amplitude to a two-body bound state. We demonstrate the details of this method by calculating on the lattice the leading M1 contribution to the radiative neutron capture on proton at low energies using pionless effective field theory. We find good agreement with exact continuum results.

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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