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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Hi,<br>
<br>
I am sending a link to the plot where I take into account the photon spin density matrix in case of generated phi meson data.<br>
<br>
How do I do that:<br>
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I create isotropic distribution in GJ Frame where KK decays to phi mass and width.<br>
<br>
I create two independent sets of KK decaying to phi in a P- and P+ wave, where the 2 sets have no event in common. I then add the two sets to create one where I have equal numbers of P+ and P- events. Lets call it p+p- set.<br>
<br>
This takes care of the photon spin density matrix.<br>
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The plot I link here, was generated by fitting my standard wavelist to the p+p-. Let me summarise the plots.<br>
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1) Leftmost column is the p+p- data generated for the fit.<br>
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2) RightMost column is the isotropically generated MC events.<br>
<br>
3) Center Column is the isotropically generated MC events Weighted with the production amplitudes obtained from the fit to the data plotted in the leftmost column.<br>
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4) Top row is GJ Costheta, middle row is GJ phi and the bottom is the 2D plot of theta vs phi.
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<br>
Expectation is - if the fit is good, after the weighing of the isotropic MC, the weighed isotropic data will look like the fitted data.<br>
<br>
Also when you have both helicities + and - for a J=1 wave. the GJ phi distribution is flat as seen in the picture.<br>
<br>
http://clasweb.jlab.org/rungroups/g12/wiki/index.php/Image:Sum_Phi_Weighted_Generated.png<br>
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This is what we see and I am assuming this is what Dennis had been asking for. <br>
<br>
Let me know if this is reasonable.<br>
<br>
Regards,<br>
Mukesh. <br>
<br>
<br>
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