质子衰变；衰变寿命；重子数守恒；探测器。
Proton decay, Decay lifetime, Baryon-number Conservation, Detector.
而K中介子能被任何质子衰变探测仪探测到，比如日本的超级神冈探测器(精度最高)。
And that kaon could be detected by any machine looking for proton decays, namely Japan's SuperKamiokande detector (pictured top).
为了探测质子衰变放射性的假想形式，人们修建了巨大的探测器，但这些探测器从没发现这种东西。
Giant detectors built to look for a hypothetical form of radioactivity in which protons decay never found such a thing.
但是它们可能导致质子衰变，如果这个假设被证明是正确的，这将是一个大问题。因为在现有粒子物理的标准模型中质子是不能衰变的。
But they could cause a proton to decay — a very big deal, if it turns out to be correct, since proton decay isn't allowed under the current Standard Model of particle physics.
这样的装置有助于发现证实更多的假说现象，如质子的稀有衰变。
Such facilities could search for other hypothesized phenomena such as the extremely rare decay of protons.
原子内的一个中子衰变后会产生一个质子、一个电子和一个中微子。
When a neutron inside an atom decays, it produces a proton, an electron, and a neutrino.
反中子逃离大气，然后在高得多的区域衰变为反质子。
The antineutrons escape the atmosphere and then decay into antiprotons at much higher altitudes.
一束质子撞击在一个固定靶上，制造出一群散射而出，且在几分之一秒之后就会衰变成中微子的介子。
A bunch of protons smash into a fixed target, creating a horde of scattered mesons, which last for fractions of a second before decaying into neutrinos.
它们预测质子应该会衰变为更轻的粒子。
没有质子被观测到如此衰变，显示出这样的事件很少见。
The fact that no proton has been seen to do so suggests such events are exceedingly rare.
到那时候所有的恒星都会烧尽，而在其中的质子和中子可能会衰变成轻粒子和辐射。
By then all the stars will have burned out and the protons and neutrons in them will probably have decayed into light particles and radiation.
他们预测道质子会衰变成为轻质子。
他们预测道质子会衰变成为轻质子。
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