Study of a background reconstruction method for the measurement of D −D azimuthal angular correlations

We study experimental background reconstruction methods for the measurement of D−D correlation using a PYTHIA simulation. Like-sign and side-band background methods that are widely used in the experimental measurements of single D-meson production yields were deployed for the correlation background study. It is found that the like-sign method which well describes the combinatorial background of single D meson yields fails to reproduce the correlated background in the D0−D0 correlation measurement, while the side-band background method yields a good description of the background for both the single D yields and of the correlated background of the D0−D0 correlation measurement.