The abundance of Stokes V profiles dominated by one lobe at the locations of emergence of \Omega -shaped magnetic loops is evaluated .
The emergence events were found in Hinode SOT/SP time-sequences of quiet-Sun regions .
Such a study has the aim of confirming a prediction based on the basic geometrical and physical properties of emerging magnetic loops : Stokes V profiles dominated by one lobe are possibly the main polarimetric signature of these structures .
In agreement with this prediction , 47 % of the Stokes V profiles analyzed has an amplitude asymmetry | \delta a| > 0.3 , while in the quiet-Sun the abundance is of about 30 % .
This excess with respect to the quiet-Sun is found consistently for whatever value of the threshold on the amplitude asymmetry .
Such a result proves the goodness of the physical scenarios so far proposed for the interpretation of loop emergence events and may prompt the use of Stokes V profiles dominated by one lobe as a new proxy for their identification in observations with a good spectral sampling .