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Maximum probability required for VTOSLL EvtGen model
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The EvtGen decay model EvtVtoSll (VTOSLL) does not set a maximum decay probability. Choosing a value of 10 still produces "prob > probmax" warnings, since the probability distribution is peaked at low values but has a very long, extensive tail. Selecting higher max values reduces the accept/reject efficiency, eventually leading to just generating phase-space events.

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jback triaged this task as Normal priority.Sep 11 2021, 4:18 PM
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Example probability distribution for Dstar0 -> D0 e+ e- decay:

VTOSLLProb.png (409×710 px, 8 KB)
VTOSLLProb2.png (327×536 px, 5 KB)