t1 - updated Wednesday 2 nd February, 2011 11:53 Model #1...

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Unformatted text preview: updated Wednesday 2 nd February, 2011 11:53 Model #1 Electrodynamics with a light pseudoscalar, , mass L = ( i e A m ) 1 4 F F + 1 2 2 2 2 4! 4 if 5 renormalizable quantum field theory all couplings have zero or positive mass dimension no couplings are missing most general couplings for this set of fields with zero or positive dimension and consistent with symmetries Lorentz invariance, EM gauge invariance and parity we will use this simple world to introduce the idea of an effective quantum field theory at low energies this will be one of our central themes Model #1 Electrodynamics with a light pseudoscalar, , mass L = ( i e A m ) 1 4 F F + 1 2 2 2 2 4! 4 if 5 renormalizable quantum field theory all couplings have zero or positive mass dimension no couplings are missing most general couplings for this set of fields with zero or positive dimension and consistent with symmetries Lorentz invariance, EM gauge invariance and parity we will use this simple world to introduce the idea of an effective quantum field theory at low energies this will be one of our central themes Model #1 Electrodynamics with a light pseudoscalar, , mass L = ( i e A m ) 1 4 F F + 1 2 2 2 2 4! 4 if 5 renormalizable quantum field theory all couplings have zero or positive mass dimension no couplings are missing most general couplings for this set of fields with zero or positive dimension and consistent with symmetries Lorentz invariance, EM gauge invariance and parity we will use this simple world to introduce the idea of an effective quantum field theory at low energies this will be one of our central themes Model #1 Electrodynamics with a light pseudoscalar, , mass L = ( i e A m ) 1 4 F F + 1 2 2 2 2 4! 4 if 5 renormalizable quantum field theory all couplings have zero or positive mass dimension no couplings are missing most general couplings for this set of fields with zero or positive dimension and consistent with symmetries Lorentz invariance, EM gauge invariance and parity we will use this simple world to introduce the idea of an effective quantum field theory at low energies this will be one of our central themes Model #1 Electrodynamics with a light pseudoscalar, , mass L = ( i e A m ) 1 4 F F + 1 2 2 2 2 4!...
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t1 - updated Wednesday 2 nd February, 2011 11:53 Model #1...

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