在弱衰变中,保持较少的守恒量,除了能量、动量、角动量、重子数、轻子数、电荷外,其他量子数都不守恒。这些量子数的改变遵循某些确定的选择规则。如:①所有强子总的奇异数S只能按ΔS=0,±1变化;② 如果ΔS≠0,则;③在半轻子衰变过程中,强子总的电荷Q与ΔS有关系ΔQ=ΔS等。
只有重力和一种可以支配某些放射性衰变的弱核力能够使其聚集凝固,“弱反应”这一术语由此得名。
Only gravity and a phenomenon called the weak nuclear force, which governs some types of radioactive decay, can bind them—hence the term “weakly interacting”.
之所以称其为“弱作用”,是为了指出粒子受到四大基本力中的另一种——由放射性衰变所产生的弱核力(四大基本力是:引力、电磁力、强力、弱力)。
By calling them “weakly interacting”, physicists mean that the particles experience another of the four fundamental forces, namely, the weak nuclear force that is responsible for radioactive decay.
而且,在弱相互作用重粒子衰变成超级弱相互作用重粒子过程中,应该产生光子和电子等副产品,并且这些粒子也会与质量较轻的原子核发生碰撞,将它们撞碎。
In addition, the decay from WIMP to super-WIMP should have produced photons or electrons as a by-product, and these particles can smash into light nuclei and break them apart.
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