Neutrinos, which have no charge and very little mass, form out of nuclear reactions and particle decays.
质量极小且不带电的中微子,是在核反应和粒子衰变中产生的。
2
From the energies and momenta of the two jets, researchers can infer the massof the particle that produced them.
从两束喷注的能量和动量可以推算出产生它们的粒子的质量。
3
Asquith, like many physicists, spends a lot of time thinking about particles like the elusive Higgs boson - the subatomic particle that scientists say endows everything in the universe with mass.