English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the zaia usage as premium feature

ZAIA

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the access of premium content as premium feature

Premium Content

Zendy Tools

Zendy Open

In the future International Linear Collider (ILC) experiment, highperformance tracking is essential to its physics program including precisionHiggs studies. One of major challenges for a detector such as the proposedInternational Large Detector (ILD) is to provide excellent momentum resolutionin a magnetic filed with small (but non-negligible) non-uniformity. Thenon-uniform magnetic field implies deviation from a helical track and hencerequires the extension of a helical track model used for track fitting in auniform magnetic field. In this paper, a segment-wise helical track model isintroduced as such an extension. The segment-wise helical track modelapproximates the magnetic field between two nearby measurement sites to beuniform and steps between the two sites along a helix. The helix frame is thentransformed according to the new magnetic field direction for the next step, soas to take into account the non-uniformity of the magnetic field. Details ofthe algorithm and mathematical aspects of the segment-wise helical track modelin a Kalman-filter-based track fitting in the non-uniform magnetic field areelaborated. The new track model is implemented and successfully tested in theframework of the Kalman filter tracking software package, KalTest, which wasoriginally developed for tracking in a uniform magnetic field.

Kalman-filter-based track fitting in non-uniform magnetic field with segment-wise helical track model