Alignment of the CMS tracker with LHC and cosmic ray data

Alignment of the CMS tracker with LHC and cosmic ray data https://t.co/JIUqHi1OMo

RT @freyablekman: Why is that important? Our precision on particle momentum measurement relies directly on being able to reconstruct the tr…

Why is that important? Our precision on particle momentum measurement relies directly on being able to reconstruct the track of a charged particle as accurately as possible. So it affects identification of electrons, muons but also is important for missing

#CMSpaper 329: tracker alignment. The central tracker of @CMSexperiment is the largest silicon particle detector ever built and can measure particle locations with accuracy of about 1/100 millimeter, but only if REALLY well known where detector parts are!