Proton-proton fusion in pionless effective theory
Proton-proton fusion in pionless effective theory
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DOI：
10.1016/j.physletb.2008.08.040
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发表时间：
2008-01
影响因子：
4.4
通讯作者：
S. Ando;J. W. Shin;C. H. Hyun;S. W. Hong;U. K.KuboderaSungkyunkwan;U. Manchester;U. Daegu;U. O. N. Carolina
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文献类型：
--
作者：
S. Ando;J. W. Shin;C. H. Hyun;S. W. Hong;U. K.KuboderaSungkyunkwan;U. Manchester;U. Daegu;U. O. N. Carolina
在双重子场为次领先级的无极有效场理论（EFT）中研究了质子-质子聚变反应pp→de+ν。借助于双重子场，有效距离修正自然恢复到无限阶，从而大大简化了计算。此外，在轴流双重子-双重子接触顶点出现的低能常数是通过二体和一体矩阵元素的比值来确定的，这非常精确地再现了氚的寿命。因此，我们可以对该过程进行无参数计算。将数值计算结果与精确电位模型和以往的无点阵电液计算结果进行了比较，结果表明，在精度优于1%的范围内，两者吻合较好。
The proton–proton fusion reaction, pp→de+ν, is studied in pionless effective field theory (EFT) with di-baryon fields up to next-to leading order. With the aid of the di-baryon fields, the effective range corrections are naturally resummed up to the infinite order and thus the calculation is greatly simplified. Furthermore, the low-energy constant which appears in the axial-current-di-baryon–di-baryon contact vertex is fixed through the ratio of two- and one-body matrix elements which reproduces the tritium lifetime very precisely. As a result we can perform a parameter free calculation for the process. We compare our numerical result with those from the accurate potential model and previous pionless EFT calculations, and find a good agreement within the accuracy better than 1%.