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gcowan / RapidSim

Phase space generation of b hadron decays
MIT License
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RapidSim - reconstructed electron eta always positive #14

Closed bifani closed 7 years ago

bifani commented 7 years ago

While playing with RapidSim I noticed something odd.

I am generating the decay B+ -> { K1(1270)+ -> {K*0 -> K+ pi-} pi+ } e+ e- in 4pi, but while both the TRUE and RECO eta of the hadrons are distributed between -10 and +10, the RECO eta of the electrons is always >0 (although the corresponding TRUE eta can be <0).

Is there a spurious abs in the electron “reconstruction” or am I missing something?

kp_eta ep_eta

dcraik commented 7 years ago

This is due to a missing line in RapidMomentumSmearHisto::smearMomentum, which is only used by the LHCbElectron smearing model. Fixed in latest github commit.