arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1209.2552nucl-th
收藏

有效场论中的近阈质子-质子聚变

Near Threshold Proton-Proton Fusion in Effective Field Theory

Jiunn-Wei Chen, C. -P. Liu, Shen-Hsi Yu

摘要:

用无介子有效场论解析计算核矩阵元,得到了质子-质子聚变的天体物理S因子S_11(E)。对于三阶,零能量结果S_11(0)和一阶能量导数S '_11(0)分别为(3.99 \pm 0.14)* 10^-25 MeV b和S_11(0)*(11.3 \pm 0.1)MeV^-1;两者都与当前采用的值一致。第二能量导数也是第一次计算,结果S”_11(0)= S_11(0)*(170 \pm 2)MeV^-2对太阳中心聚变率的贡献为0.5%,小于之前估计的1%。

英文摘要:

The astrophysical S-factor for proton-proton fusion, S_11(E), is obtained with the nuclear matrix element analytically calculated in pionless effective field theory. To the third order, the zero-energy result S_11(0) and the first energy derivative S'_11(0) are found to be (3.99 \pm 0.14)* 10^-25 MeV b and S_11(0)*(11.3 \pm 0.1) MeV^-1, respectively; both consistent with the current adopted values. The second energy derivative is also calculated for the first time, and the result S"_11(0) = S_11(0)*(170 \pm 2) MeV^-2 contributes at the level of 0.5% to the fusion rate at the solar center, which is smaller than 1% as previously estimated.

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。

↑