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Old Oct 21st 2008, 11:23 AM   #1
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Unhappy Quark, Electron and Exchange Particles ???

I have no idea where to start. Can anyone give me any guidelines?

The question is

Name a force which acts between an up quark and an electron. Explain with refrence to an exchange particle, how this force operates
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Old Jul 7th 2009, 04:15 PM   #2
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quark-electron interaction

there are few ways up quarks and electrons can interact. They can interact via the electromagnetic force by exchanging photons, since both are electrically charged. They can also interact via the weak force, by exchanging Z or W particles. However, since the Z and W are very heavy, this interaction is negligible at normal situations(low energies)
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