Notes on Inverse Primakoff Scattering of Axions
Notes on Inverse Primakoff Scattering of Axions
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发表时间：
2020-12
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通讯作者：
T. Abe;K. Hamaguchi;N. Nagata
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作者：
T. Abe;K. Hamaguchi;N. Nagata
我们重新研究了轴子的逆Primakoff散射，特别是那些像太阳轴子一样具有O(1)kev能量的轴子。对于这样的轴子，散射过程的截面很大程度上取决于目标原子的结构。我们用一个真实的原子形状因子重新计算了散射截面，发现它可能与以前的结果相差一个数量级以上。我们还发现，当动量转移的大小为1$kev时，末态包含一个被激发或电离的原子的非弹性散射过程可以是类似的，甚至是占主导地位的。此外，我们还考虑了能量为O(10)MeV的超新星轴子的散射，结果表明，在这种情况下，散射截面很少依赖于原子结构。我们还指出，在未来的中微子实验中，来自附近超新星的轴子可能会发生O(1)逆Primakoff事件，这可能值得对这一过程的搜索策略进行更详细的研究。
We reexamine the inverse Primakoff scattering of axions, especially those with O(1) keV energies like solar axions. For such axions, the cross section of the scattering process depends highly on the structure of target atoms. We reevaluate the scattering cross section with a realistic atomic form factor and find that it can differ from the previous results by more than an order of magnitude. It is also found that inelastic scattering processes, in which the final state contains an excited or ionized atom, can be comparable or even be dominant when the size of momentum transfer is $\lesssim 1$ keV. In addition, we consider the scattering of supernova axions, whose energy is O(10) MeV, and show that the cross section rarely depends on the atomic structure in this case. We also point out that O(1) inverse Primakoff events are expected for axions from a nearby supernova in the future neutrino experiments, which may warrant a more detailed study on the search strategy of this process.