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

Abstract

We study experimental background reconstruction methods for the measurement of $D-\overline{D}$ 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 $D^0$ meson yields fails to reproduce the correlated background in the $D^0-\overline{D^0}$ correlation measurement, while the side-band background method yields a good description of the background for both the single $D^0$ yields and of the correlated background of the $D^0-\overline{D^0}$ correlation measurement.

13 pages, 7 figures