Vertex Reconstruction: muDst status

Last time: Systematic shift in pull distributions. Now understood: The reason is the default vertex position for failed fits. Put vertex direclty on beamline if fit fails.

Marking tracks as primary. The global tracks assigned to vertex at final stage if

track was used in seeding OR d/(sigma_DCA + sigma_vertex) < N (fully correlated DCA and vertex)


d is the distance between the track DCA and the vertex
sigma_DCA is the total error (amplitude) on the track DCA
sigma_vertex is the total error (amplitude) on the vertex position

Results available at:

beamline 1D

beamline 3D

no beamline