| 单词 | jet |
| 释义 | jet A set of particles produced from the vacuum state by the movement of quarks and gluons with high momentum found in electron—positron annihilation. The energy associated with electron—positron annihilation produces quark—antiquark paris. The quark and antiquark move away from each other very rapidly if the electron and positron had high energies. The potential energy between the quark and antiquark grows as they separate, thus causing further quarks and antiquarks to emerge from the vacuum. These are swept along with the original quark and antiquark. The overall effect is that two jets of hadrons emerge, one in the direction of the first quark, the other in the direction of the first antiquark. Quantum chromodynamics predicts that about 10% of the events have three jets, the third jet being due to gluons |
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