09 March 2021



Terms of reference from ICFA:

WG3 carries out the ILC physics and detector activities. It continues the study of the ILC physics capabilities and detector efforts as previously carried out under the LCC framework, reflecting the on-going progress of the field. It guides the community to be ready when the ILC Pre-Lab will establish its physics program.


WG3 Community actions

ILC is moving towards the preparatory laboratory stage (Prelab), currently envisioned to start in 2022.  In order to activate the community towards preparing the Expressions of Interest for the experiments, the Physics and Detector Working Group (WG3) aims to:

  • Raise awareness and interest in the ILC development and expand the community.
  • Support newcomers to get involved in physics and detector studies.
  • Encourage new ideas for experimentations at the ILC

While achieving this, WG3 will pay special attention to:

  • support of existing activities, as basis for any growth, through the IDT period
  • visibility for young scientists engaging in ILC activities
  • increased diversity among conveners


WG3 Work plan

Scopes of primary interest include (but are not limited to):


General aspects:

  • Prepare decisions on potential changes to the ILC baseline design (g. positron polarization, permanent magnets in the damping rings) by studying their physics and detector implications.
  • Investigate possible extensions of the physics programme with non-collider options: studies on beam dump, off IP experiments, fixed-target experiments…
  • Connect with WG3-related activities beyond ILC-only, e.g. the ECFA Higgs Factory study, ECFA Detector Roadmap, Snowmass, Key4HEP, etc


Technical aspects:

  • Identify all machine/detector interface issues to be addressed by the Prelab to finalize the ILC design (e.g. interaction campus, experimental hall, interaction regions, operating scenario), through a forum of exchange of information between machine and detector requirements, and study their implications for the experiments design.
  • Monitor the global detector R&D – in ILC detector concept groups, detector R&D collaborations, and beyond the current ILC community – and enable new efforts to introduce emerging detector technologies into the ILC experiments.
  • Coordinate performance studies to assess the detector requirements of the ILC experiments as well as the relative performance of alternative detector solutions.
  • Contribute to defining how the Prelab structure can best foster the detectors’ final design and construction preparation in liaison with the worldwide academic bodies and industrial landscape.


Physics and Software aspects:

  • Foster and guide studies of the physics potential of the ILC, thereby in particular providing the physics input for the above general and technical aspects.
  • Write the ILC Snowmass White Paper, due early 2022, and work towards an ILC Physics Resource Book, target due date 2024/25
  • Foster and guide the development and adoption of common software tools for ILC physics and detector design studies, and plan the computing resources and infrastructure required for the ILC Laboratory.


Expressions of Interest for experiments:

The above actions are aimed to facilitate the preparation by the Community of Expressions of Interest for experiments at the ILC. A call for Expressions of Interests is expected to be launched by the IDT shortly ahead of the start of the Prelab.