View source for Weak mode (detector alignment)

[[Category:Tracker]]
[[Category:Detector]]
In [[tracker alignment]], '''weak modes''' are coherent misalignments that have little effect on the goodness of fit (e.g. χ<sup>2</sup>) of a track. This makes them difficult (or impossible) to correct for with track-based alignment, which relies on the dependence of the goodness of fit on the detector alignment.

== Learn more ==

[https://hep.uchicago.edu/~johnda/thesis/Alignment.pdf John Alison's PhD thesis (2012)], see PDF page 12 (document page 53, section 5.2.3)