Slava Krutelyov

improve handling of pt==0 for non-zero momentum in (track) state propagation

5

as a follow up to #44639 https://github.com/cms-sw/cmssw/issues/44639#issuecomment-2046636794 The most appropriate solution seems to be to get all flavors of `Helix*Crossing` in the TrackingTools/GeomPropagators package to handle cases where `pt==0`. This...

possible bug in HLLHCEvtVtxGenerator in RF800 mode

4

https://github.com/cms-sw/cmssw/pull/44882/#discussion_r1586423365 The code in HLLHCEvtVtxGenerator for RF800 mode was introduced in #16942 (@lgray ) https://github.com/cms-sw/cmssw/blob/8c360107b0c6b0649d8f3f4d4fcf19668a4cafeb/IOMC/EventVertexGenerators/src/HLLHCEvtVtxGenerator.cc#L195-L201 `k * s` on L200 picks up `s = second = 1e9` from CLHEP initially...

remove unused mkFitHitConverter_cfi.py

5

related to one of the topics in #45106

need for automatic detection of numerical underflows in histograms

2

In data/MC comparisons for tracking we were hit by the limits of TH1F numerical precision. Histograms with more than around 1e7 entries in a bin will stop accumulation in that...

update PackedCandidate::dzError to return what it should in track parameterization

33

in response to #45598 prior to this PR `PackedCandidate` saved had a mis-named covariance element `dz` instead of `dsz` Details of all track parameters from TrackBase.h: https://github.com/cms-sw/cmssw/blob/fd00eb29f71ae9d94759a5bb2305cd63ff3f415a/DataFormats/TrackReco/interface/TrackBase.h#L19-L25 This PR updates...