trackreco / mkFit

Vectorized, Parallelized Tracking
https://trackreco.github.io/
Apache License 2.0
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fix error propagation in helixToZ #353

Closed cerati closed 2 years ago

cerati commented 2 years ago

This PR fixes an issue in error propagation in helixToZ.

The effect is to recover the number of strip layers in the high pT 10 mu sample: http://uaf-10.t2.ucsd.edu/~cerati/plots_Sep05_10mu_testzfix_gcc/plots_building_initialStep/hitsLayers.pdf

This does not have much effect on ttbar.

More plots for both 10mu and ttbar at: http://uaf-10.t2.ucsd.edu/~cerati/plots_Sep05_10mu_testzfix_gcc/ http://uaf-10.t2.ucsd.edu/~cerati/plots_Sep05_ttbar_testzfix_gcc/

A document with the math I used to derive the jacobian can be found at this link: https://www.overleaf.com/9112147731xmvddqxtwgxq