# Difference: Brenoorzari (49 vs. 50)

#### Revision 502020-10-16 - brenoorzari

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# Title

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• D0_particles_em_s0.png:
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### 16/10/2020

Apparently Delphes was calculating the D0 of the s0 particles wrong. Left plot below shows the comparison of all the leptons and s0 with status 1 that are daughters of F particles (there are 20000 of each), but with D0 being calculated as D0 = (x*py - y*px)/pt of the particles. Just to make sure that this equation is the one that Delphes uses, in the right plot I compared the distribution of the leptons D0 variables that comes from Delphes (lepton->D0) and the one calculated. They are exactly the same, with very few exceptions for very high D0 (I still need to make the same test with higher c\tau runs; this one is for c\tau ~ 100 mm).

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