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Neutral Resonances

The influence from neutral resonance decays can be studied by adding pairs with one positively and one negatively charged particle. The separation in azimuth between the two particles is determined from a gaussian distribution. In fig. 3.6 $ v(Q)$ is displayed for different amounts of contributions from resonances. A width of 30 is used for the azimuthal separation of the decay particles.

Figure 3.6: $ v(Q)$ as a function of acceptance. A fraction $ f_{res}$ of the particles originate from decays of neutral resonances.
\begin{figure}\centerline{\hbox{\epsfxsize=10cm\epsffile{images/resonfrac.eps}}} \end{figure}

Fig. 3.7 shows how the reduction in the fluctuations seen here depends on the azimuthal separation between the resonance decay particles.

Figure 3.7: $ v(Q)$ as a function of acceptance. Here 30% ($ f_{res}$=0.3) of the particles in each event originate from decays of neutral resonances.
\begin{figure}\centerline{\hbox{\epsfxsize=10cm\epsffile{images/resonangle.eps}}} \end{figure}


Henrik Tydesjo 2003-02-24