Frank L. H. Wolfs
Department of
Physics and Astronomy, University of Rochester
T0 Vertex Studies
¥It is not the calculated time delay (this
effect the position of the vertex distribution for a specific counter
combination, not the width).
¥Bug in software when T0 event is created?
Not likely, since asymmetry is clearly visible in the raw FB data.
¥Effect of magnetic field? No; runs with no magnetic field show
the same effect.
¥Secondaries? Most likely, but the asymmetry does not show up in the
Monte-Carlo simulations.
¥Conclusion: this is a real effect but not understood
yet.
