论文标题
氢原子有多长时间？
How long does the hydrogen atom live?
论文作者
论文摘要
质子可能稳定，而原子氢则可能稳定。在模型中，携带重子数的新颗粒的模型是这种情况，这些颗粒足够轻，可以稳定，但足够重，以使质子衰减受到运动的阻塞。解释中子寿命异常的新物理学模型通常具有此特征，从而使原子氢通过质子上的电子捕获而腐烂。我们计算涉及几百个KEV光子发射的辐射氢衰变速率，这使得该过程在实验中可检测到。特别是，我们表明，孔的低能部分对辐射氢衰变很敏感，并将其转变为$ 10^{30}〜\ rm s $或更强的氢寿命限制。对于中子与深色重子混合的型号，$χ$，这将混合角度限制在$ 10^{ - 11} $上，限制了$ n \ to的χγ$分支到$ 10^{ - 4} $，在广泛的参数空间上。
It is possible that the proton is stable while atomic hydrogen is not. This is the case in models with new particles carrying baryon number which are light enough to be stable themselves but heavy enough so that proton decay is kinematically blocked. Models of new physics that explain the neutron lifetime anomaly generically have this feature, allowing for atomic hydrogen to decay through electron capture on a proton. We calculate the radiative hydrogen decay rate involving the emission of a few hundred keV photon, which makes this process detectable in experiment. In particular, we show that the low energy part of the Borexino spectrum is sensitive to radiative hydrogen decay, and turn this into a limit on the hydrogen lifetime of order $10^{30}~\rm s$ or stronger. For models where the neutron mixes with a dark baryon, $χ$, this limits the mixing angle to roughly $10^{-11}$, restricting the $n\toχγ$ branching to $10^{-4}$, over a wide range of parameter space.
