Methods for Kalman filter linearized wrt reference track#14866
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shahor02 merged 3 commits intoAliceO2Group:devfrom Nov 29, 2025
Merged
Methods for Kalman filter linearized wrt reference track#14866shahor02 merged 3 commits intoAliceO2Group:devfrom
shahor02 merged 3 commits intoAliceO2Group:devfrom
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Error while checking build/O2/fullCI_slc9 for 7e23409 at 2025-11-28 03:49: Full log here. |
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At the moment reseeding of lin.ref is not done, it is taken from the existing track seed
With scdcalib.refitITS=true (default) the ITS track outer param will be refitted from scratch using stable Kalman filter staring from the inner param (and using it as as linearization point) and imposing PID of the global track (if any). Note that the reconstruction is done with extra syst.errors on the ITS clusters (20 microns): they can be added also for this refit with usual ITSCATrackerParam.sysErrY2... settings (though this is not necessary). The track residuals wrt the PV are added to the unbinned residuals with identified of padrow 190. Note that PV residuals interpretation differs from the rest: they are provided at the PCA of the track to PV, with PV rotated to the frame of the track. The X of the vertex in this frame is stored in the channel slot mapped from [-0.5:0.5] to short; the alpha of the track frame is stored as the angle in [-pi : pi] mapped to short: auto dy = yv - trkAtPCA.getY(), auto dz = zv - trkAtPCA.getZ(); short compXV = static_cast<short>(xv * 0x7fff / param::MaxVtxX); // MaxVtxX = 0.5 cm mClRes.emplace_back(dy, dz, trkAtPCA.getAlpha() / TMath::Pi(), trkWorkITS.getY(), trkWorkITS.getZ(), 190, -1, compXV);
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This PR is similar to #14862, but before its overloaded methods compilation was failing on GPU. Reopening to check if #14865 fixes the problem.