Issue in matching between HLT object and L1 object

[jaimeleonh]

When running the nanoAOD production, in https://github.com/cms-sw/cmssw/blob/master/PhysicsTools/NanoAOD/plugins/TriggerObjectTableProducer.cc#L252-L255 there's a loop that tries to find the L1 object that best matches (in dR) with the desired HLT object. However, the best value is not getting updated, so the last L1object from the collection whose dR with the HLT object is smaller than sel.l1DR2 (which to be true I'm not sure what is), is the one getting stored, even if there's a previous one with an smaller dR. Is this behaviour intended?

[cmsbuild]

A new Issue was created by @jaimeleonh Jaime Leon Holgado.

@Dr15Jones, @perrotta, @dpiparo, @rappoccio, @makortel, @smuzaffar can you please review it and eventually sign/assign? Thanks.

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[makortel]

assign xpog

[cmsbuild]

New categories assigned: xpog

@swertz,@vlimant you have been requested to review this Pull request/Issue and eventually sign? Thanks

[swertz]

Thanks for reporting @jaimeleonh , this looks like a bug indeed. I will make a PR to fix it and backport it to 124X. However we are planning to change the way trigger object info is stored in nano as this is not the only issue with the TriggerObjectTableProducer...

[perrotta]

This looks like having been fixed in master by #39893
Also the backport in 12_4 is available, #39932, while the one in 12_5_X is still missing: I suggest to keep this issue open until also the backport in the intermediate release is available

[perrotta]

urgent

[swertz]

+xpog

Fixed in #39893 and backports #39932 and #39954

[cmsbuild]

This issue is fully signed and ready to be closed.