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大爆炸核合成：强核力与弱人择原理的相遇

Big Bang Nucleosynthesis: The Strong Nuclear Force meets the Weak Anthropic Principle

J. MacDonald, D. J. Mullan

备注：
13 figures
发表信息：
Phys.Rev.D80:043507,2009
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摘要：

相反，一个共同的论点，即一个小的增加，在强大的力量将导致破坏所有的氢在大爆炸由于绑定的双质子和双中子的灾难性影响的生活，因为我们知道它，我们表明，提供强有力的耦合常数的增加是小于约50%的大量的氢仍然存在。原因是强作用力强度的增加导致了氘核的更紧密结合，使得核合成在大爆炸中比标准大爆炸更早发生，温度更高。结合不那么紧密的双质子和双中子的光破坏将它们的产生推迟到大部分核合成完成之后。然而，双质子的衰变可以导致相对较大的氘丰度。

英文摘要：

Contrary to a common argument that a small increase in the strength of the strong force would lead to destruction of all hydrogen in the big bang due to binding of the diproton and the dineutron with a catastrophic impact on life as we know it, we show that provided the increase in strong force coupling constant is less than about 50% substantial amounts of hydrogen remain. The reason is that an increase in strong force strength leads to tighter binding of the deuteron, permitting nucleosynthesis to occur earlier in the big bang at higher temperature than in the standard big bang. Photodestruction of the less tightly bound diproton and dineutron delays their production to after the bulk of nucleosynthesis is complete. The decay of the diproton can, however, lead to relatively large abundances of deuterium.

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