Track Timing at $e^{+}e^{-}$ Linear Colliders with a Silicon Drift Detector Main Tracker

TL;DR

This paper evaluates the timing capabilities of a silicon drift detector tracker for future linear electron-positron colliders, demonstrating nanosecond to sub-nanosecond precision that can distinguish individual bunch crossings.

Contribution

It proposes a design for the tracker that optimizes both momentum resolution and timing, enabling effective bunch crossing identification.

Findings

Track timing at nanosecond to sub-nanosecond levels

Ability to assign tracks to specific bunch crossings with high confidence

Optimized drift axes improve both momentum resolution and timing

Abstract

The track timing capabilities of a silicon drift detector based tracker for a future linear electron-positron collider are evaluated. We show such a detector can time tracks at the nanosecond, and for high-$P_{T}$, sub-nanosecond level. This implies that, even for collider designs with the bunch spacing at 1.4 ns, every track can be assigned to a particular bunch crossing at a confidence level of up to two standard deviations. We suggest a choice for the drift axes in the tracker layers to simultaneously optimize the momentum resolution and track timing.