Tracking detectors face future collider

A new review paper outlines the demanding requirements for tracking and vertexing detectors at future particle colliders. The paper, published on arXiv on 28 August 2026, states that precise and efficient track reconstruction is essential to exploit the physics potential of these experiments.

Several common trends emerge across different proposed collider types. Tracking systems will need increasingly precise spatial measurements. Low-material designs are a universal priority. In some cases, detectors will need integrated particle identification capabilities.

Detector technologies for different colliders

Monolithic active pixel sensors are currently the leading option for vertex detectors at future electron-positron and electron-hadron colliders. For the main tracker systems, concepts vary widely. Gaseous detectors can provide many measurements per track and achieve very low material budgets. Silicon and scintillating-fibre trackers offer fewer but more precise measurements and can tolerate higher hit rates.

The requirements are shaped by the collider type and its specific collision environment. The needed measurement precision and the beam structure are also critical factors. The paper reviews requirements for future $e^+e^-$, $e^-$-hadron, $mu^+mu^-$, and hadron colliders.

Specific challenges for hadron colliders

Future hadron colliders present unique and severe challenges. The paper highlights that at a 10 TeV parton centre-of-mass collider, precision timing throughout the entire tracking system becomes necessary. This timing is needed for beam-background rejection or to mitigate pile-up effects.

Radiation tolerance is another major hurdle. The review states that future hadron colliders will require radiation tolerance "beyond that demonstrated by existing sensor technologies." This represents a significant technological leap.

The path forward

Meeting all these requirements will not be simple. The arXiv paper concludes that substantial research and development is required. An integrated optimisation approach is essential. This means simultaneously improving sensors, front-end electronics, readout systems, cooling, powering, and mechanical support structures. You can find more technical details on specific stats and potential injuries to sensor performance from radiation.

The paper serves as a comprehensive overview of the field's trajectory. It highlights that detector innovation must keep pace with collider energy and luminosity goals. The future of high-energy physics discovery depends on these advanced instruments, which will be key components in the experimental fixtures of tomorrow's facilities.