To determine the mass of charged leptons, we rotate such that the matrix of yukawa couplings (which gives the mass matrix after EWSB) is diagonal.(adsbygoogle = window.adsbygoogle || []).push({});

We also call this flavour basis for neutrinos, because the flavoured neutrinos couple directly to the correspondong flavoured lepton in weak charged current interactions.

we often see the notation in text that we rotate from ##e'_L \rightarrow e_L ## and ## \nu'_{e L} \rightarrow \nu_{eL} ##

Where the UN-primed is the mass basis of charged leptons.

What is the primed basis?

for neutrinos

##\nu_{eL}## is flavour/interaction basis (e, mu tau)

##\nu_1## is mass basis (1,2,3)

what is ##\nu'_{eL}## ?? (e, mu, tau)

for leptons

## e_L ## is mass/flavour/interaction basis

what is ## e'_L ## ?

##\nu'_{eL}## and ##\nu_{eL}## are both LH and both electron flavour.. so im not sure what the difference is?

Is it just that we rotate nu' simply because we rotated the charged leptons ?

Even if this is so, im still not sure what the dashed basis ##e'_L## was in the first place

Is this to do with interactions before and after EWSB?

Thanks in advance

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# A Transforming lepton basis to diagonlise charged lepton mass

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