Measurement of event-shape observables in $$Z \rightarrow \ell ^{+} \ell ^{-}$$ Z → ℓ + ℓ - events in pp collisions at $$\sqrt{s}=7$$ s = 7 $${\mathrm{TeV}}$$ TeV with the ATLAS detector at the LHC
European physical journal. C, Particles and fields