Skip to content

MatchCosmics: propagate the seed covariance to the DCA #15894

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
matthias-kleiner wants to merge 1 commit into
base: dev
Choose a base branch
from
Open

MatchCosmics: propagate the seed covariance to the DCA #15894

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 4 additions & 2 deletions Detectors/GlobalTracking/src/MatchCosmics.cxx
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -57,8 +57,10 @@ void MatchCosmics::process(const o2::globaltracking::RecoContainer& data)
createSeeds(data);
int ntr = mSeeds.size();
const auto prop = o2::base::Propagator::Instance();
// propagate to DCA to origin
const o2::math_utils::Point3D<float> v{0., 0., 0};
// propagate to DCA to origin. A VertexBase (origin, zero covariance) selects the TrackParCov overload of propagateToDCABxByBz:
// with a Point3D the TrackPar_t overload is used and only the parameters are propagated, the covariance stays the one at the
// track's reference X (TPC inner radius), which makes the y/snp cuts and the chi2 of checkPair far too tight.
const o2::dataformats::VertexBase v;
for (int i = 0; i < ntr; i++) {
auto& trc = mSeeds[i];
if (trc.matchID != Reject) {
Expand Down
Loading