¥What can
cause this asymmetry?
¥It
is not the magnetic field.
¥It
is not the floor.
¥It
is not the software.
¥It is
not the calculated time delay (this effect the position of the vertex
distribution for a specific counter combination, not the width).
¥At the moment, we have no
clear indication what effect is responsible for the observed asymmetry. Monte-Carlo studied are in progress to
see if this effect is also present in the simulated data.