Using the pi0 sample to estimate the amount of material in front of the endcap
Updated on Fri, 2008-05-09 17:45. Originally created by jwebb on 2008-05-09 17:45.
![](/STAR/files/userfiles/87/image/05-07-2008-background-efficiencies/mass-spectrum.png)
![](/STAR/files/userfiles/87/image/05-07-2008-background-efficiencies/yield-vs-uv.png)
Abstract -- We look at the mean energy deposited in the 1st preshower layer above the higher energy gamma in a sample of isolated, reconstructed pi0 decays.
![](/STAR/files/userfiles/87/image/05-07-2008-background-efficiencies/mass-spectrum.png)
![](/STAR/files/userfiles/87/image/05-07-2008-background-efficiencies/D-spectrum.png)
![](/STAR/files/userfiles/87/image/05-07-2008-background-efficiencies/yield-vs-uv.png)
![](/STAR/files/userfiles/87/image/05-07-2008-background-efficiencies/mean-epre1-vs-uv.png)
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