As shown in Re^2: Why is variable length lookahead implemented while lookbehind is not?, you need to use the vertical bar to achieve the effect: 
/^((?:.*?(?: and| &) (*SKIP)(*FAIL))?)| (\Q$Jrnl\E)$/

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Note that you can't capture the failed group, so $1 is empty.

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In reply to Re: Another Look behind by choroba
in thread Another Look behind by dominic01

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