Since this is the first Newsline of the year, let me start by wishing you all a happy new year. With the anticipated update of the European Strategy for Particle Physics, where the meeting of the European Strategy Group for drafting is planned in December this year, we will have an exciting and busy 2025 ahead of us.
The focus of the strategy update is the next flagship machine at CERN, which will inevitably have a large impact on the particle physics programme worldwide. Therefore, input from other regions, particularly on the large accelerator projects under consideration, have vital importance for Europe to construct a strategy in a global context. In this regard, the ILC International Development Team (IDT) will submit a document describing the status of the ILC project on the technical development with the ILC Technology Network (ITN), the updated ILC-250 (the machine operated at 250 GeV centre-of-mass energy) cost with an indication of additional cost for the second beam delivery system and increasing the energies up to 500 GeV, and the plan of Japanese High-Energy Physics community for promoting the realisation of the ILC in Japan.
While the ILC project is focusing on a machine at 250 GeV, the LC Vision effort has been developing a coherent linear collider roadmap that fully exploits the advantage of a linear collider, as demonstrated by the recently held meeting at CERN reported by Jenny List and Steinar Stapnes in this Newsline. It proposes a linear collider facility which starts as a machine with moderate cost and adequate physics performance as a Higgs (possibly also Top) Factory, can then evolve to higher energies up to one TeV and beyond, as well as one to two orders of magnitudes higher luminosities benefiting from the R&D effort that proceeds in parallel. Proposing such a facility at CERN with SRF technology for the baseline initial machine is also underway. The flexibility of such a facility, which can also accommodate science programmes beyond the core e+e- physics, makes it appropriate for the next high-energy collider to be constructed. The IDT will follow very closely this effort and contribute to its activities through synergy with the work by the IDT Working Group 2 for accelerators and Working Group 3 for physics and detectors.
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