The Down Quark
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Symbol: d Group: fermion, quark Rest mass: 0.00376 - 0.00644 u Diameter: 0 Charge: -1/3 e Mean lifetime: stable Spin: 1/2 Generation: 1 |
The down is the second lightest quark and together with the up part of the protons and neutrons. This makes it an important particle of our matter. At the decay of a free neutron, a down turns into an up quark and an electron. |
Page last changed on March 06. 2010
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