Europe targets FCC: can the world match the ambition?

CERN’s Council has unanimously backed the Future Circular Collider as the successor to the Large Hadron Collider, including a 91-kilometer ring planned beneath the Swiss-French border. The decision—made in May 2026 in Budapest—comes amid a familiar lesson from

For years. the sadness stayed quiet—there. on the prairie outskirts west of Chicago. at Fermilab. where many physicists carried the memory of what never got built. In 1993, the U.S. Congress canceled the Superconducting Super Collider. a planned 83-kilometer subterranean accelerator in Texas designed to collide particles at about three times the energy of what CERN’s Large Hadron Collider achieves today near Geneva. Construction had started. Then it was abruptly gone, along with an entire stretch of possible discoveries.

So when CERN’s leadership moved in May 2026, it landed with the weight of both history and urgency. On May 22, 2026, the CERN Council unanimously adopted an updated strategy calling for the Future Circular Collider to succeed the LHC. The FCC is envisioned as a 91-kilometer ring running beneath the Swiss-French border. It would first host a precision electron-positron collider and. while keeping a path toward a later proton collider. would aim to operate at more than twice the energies targeted for the unrealized SSC.

The technical feasibility has been demonstrated and the scientific case is described as strong. What remains—according to the strategy and the work still ahead—is the hardest part: turning the vision into reality, especially when the resources required go beyond CERN’s current budget.

The longer shadow of what was lost

In the years after the SSC was canceled, the impact didn’t fade neatly. The cancellation didn’t just halt one project; it fractured the long-term vision for high-energy physics in the United States. leaving a generation to cope with a narrowed future. The contrast mattered for younger researchers too, including the author, who began a Ph.D. at Fermilab after arriving west of Chicago and felt that the community still had life—experiments running. discoveries being made. conferences humming with new ideas.

But the story of momentum took a different route in Europe. CERN pursued the LHC rather than attempting a direct response to the SSC’s cancellation. because the LHC was already technically mature at that time. Still, timing shaped perceptions: official approval of the LHC came just 14 months after SSC was canceled. Fifteen years later, in 2009, the LHC began operation—an effort that would define the next era of discovery.

That did not mean the path was easy. The LHC faced serious resistance at CERN. with some member states reluctant to commit to a particle physics project of unprecedented scale and cost. The difference, in the account here, was institutional willingness to see it through. While the SSC collapsed after meeting the same kind of resistance, CERN built the LHC. Making it happen required negotiation and sacrifice on an institutional scale: CERN shed roughly 800 permanent staff over the construction period to absorb the cost. The United States also chipped in, ultimately contributing around half a billion dollars.

The scientific stakes of that decision are difficult to separate from the politics. Had the SSC been completed, the U.S. likely would have discovered the Higgs boson years earlier. Instead, the discovery belonged to CERN. By colliding protons at record-setting energies of almost 14 trillion electron volts (TeV). the LHC became the world’s most powerful collider and redrew the map of experimental particle physics.

That Higgs discovery is not treated here as a neat milestone. For decades. the Higgs boson was described as the missing cornerstone of the Standard Model (SM)—confirming the idea that an invisible field fills the universe and gives mass to fundamental particles. Without that mechanism, the article says, atoms, stars and life itself could not exist.

Yet the SM is not portrayed as the end of the story. It remains an incomplete description of nature. It cannot account for dark matter and offers no explanation for why the universe is made almost entirely of matter rather than equal parts matter and antimatter. It also cannot explain why fundamental particles have the masses and interaction strengths they do. with roughly 20 parameters inserted by hand rather than derived from the theory.

Even within its success, the Standard Model points to missing structure. The comparison offered is of the periodic table before quantum mechanics: a remarkably successful organizing framework that signals a deeper principle still waiting to be uncovered. The search, in other words, is not only “at the edges.” It’s also inside the model’s own questions.

Both the energy frontier and the precision frontier

The next collider is framed as a response to two ways particle physics finds answers. Traditionally, discovering heavier particles requires more collision energy, pushing what’s called the energy frontier. There is a second route: even particles too heavy to produce directly can shift the behavior of those we can measure. That’s the precision frontier.

The Higgs is used as an example of both. Discovering it required pushing the energy frontier; understanding it requires increasingly precise measurements. More than a decade into the LHC era, the account says, neither frontier has come close to exhausting its potential. The absence of new particles at the LHC is interpreted not as a dead end but as guidance—pointing both toward higher energies. where heavier states could appear. and toward higher precision. where subtle fingerprints might emerge.

For the people inside the machine-and-hope loop

As major U.S. collider programs shut down, expertise moved. Much of the American collider community joined the global LHC effort at CERN. Others stayed in the U.S., shifting toward neutrino physics, driven by the discovery that neutrinos—once thought to be massless—actually have a tiny mass.

The author’s own career traces a similar fork. After studying physics in South America. earning a Ph.D. and completing postdoctoral training in the U.S. the author became a professor. In 2011, Fermilab’s Tevatron shut down and the nation began pivoting away from collider physics toward neutrino research. A choice followed: stay in the U.S. or move to Europe, described here as the new center of the energy frontier. The author chose Europe, drawn by the hope that collider-based particle physics would continue to prosper there. Many others made the same move. trusting that Europe would still have the determination to push forward where others had stopped.

That hope is described as grounded in CERN’s record. CERN is portrayed as more than a physics laboratory and “living proof” that nations can build together something none could build alone. Over the decades. its global footprint has effectively doubled. expanding to encompass 80 countries and more than 12. 000 scientists from institutions around the world. alongside educational programs that train researchers at every level.

Alongside these numbers, something harder to measure is described as having grown: a community united around shared questions, with pursuit of fundamental knowledge driving technological innovation and international cooperation.

Europe has been building the path forward—now the world must decide

The FCC did not appear overnight. Europe has been navigating toward it for years, starting with a process the CERN Council began in 2013. That year. the CERN Council launched the first update of the European Strategy for Particle Physics (ESPP). designed to set direction for the field every five to seven years through broad consultation with particle physicists worldwide.

That 2013 report was clear about one ambition: Europe needed to be in a position to propose an ambitious post-LHC accelerator project at CERN by the next update. But at that time, the community wasn’t ready to commit to a specific large-scale project. Instead. the consensus was to focus on upgrading the LHC to increase luminosity—the number of collisions per second—rather than immediately starting a successor.

That shift produced the High-Luminosity LHC, or HL-LHC. Now under construction, it is designed to deliver several times more data than the LHC. The LHC run ended on June 14, 2026. The HL-LHC is planned to take over around 2030 and run for roughly a decade.

Then came a decisive shift in 2020. The ESPP update reaffirmed HL-LHC as the top near-term priority. while pointing unambiguously toward a hadron collider capable of reaching 100 TeV. That energy is described as far beyond what foreseeable magnet technology could achieve in the current LHC tunnel. The strategy therefore called for a new. larger tunnel that would support a staged program: first. a precision electron-positron collider to probe the SM in extraordinary detail. then a hadron collider to extend the energy frontier. Each stage would pursue physics the other couldn’t.

Timing matters because these machines take decades to design and build. The decision must come soon if the next collider is to begin operations by the mid-2040s. with delays beyond that described as risking the continuity that has sustained collider physics for generations. Particle physics. the account says. won’t disappear without colliders. but flagship projects anchor communities whose expertise is built over decades and passed from one project to the next. Without a clear path beyond HL-LHC, that chain becomes harder to maintain.

In 2025, the feasibility study for the FCC was completed, described as a major milestone in implementing the 2020 ESPP strategy. The study is said to describe not just a new machine but a decades-long program of technological innovation. including beam control required for precision measurements of the Higgs boson and development of superconducting magnets powerful enough to reach 100 TeV. The article emphasizes that some parts have yet to be invented.

The feasibility study was only one element of the 2026 update to the ESPP. That strategy process evaluated a broad range of proposals. including linear electron-positron colliders. muon colliders. electron-proton facilities. and reuse of the existing LHC tunnel. After nearly two years. the conclusion was presented as clear: the FCC offers the strongest combination of scientific reach. technical readiness. and long-term strategic value.

When the CERN Council met in Budapest in May, it endorsed the ESPP’s recommendations and set CERN on a path to preparing a proposal for governments to evaluate by 2028. At that point, the question shifts from what can be built to whether governments are willing to build it.

Signs of momentum—and the funding gap that still waits

There are signals described as encouraging that could help close the funding gap. In 2025. a consortium of private donors pledged $1 billion toward the FCC’s construction. marking the first time in CERN’s history that private philanthropy has committed to a flagship research project at this scale. The European Commission has also been described as signaling the FCC’s strategic importance by including it among 11 proposed “moonshots” in its draft plans for major science projects between 2028 and 2034.

The international dimension is also explicit. In 2024, CERN and the U.S. signed a joint statement of intent expressing the U.S.’s intention to collaborate on the FCC if CERN member states select it as the laboratory’s next major facility.

Yet the central problem remains unchanged: CERN requires resources beyond its current budget, and the decision about whether the rest of the world joins the effort will determine whether the field can keep its long storyline moving.

In the background, the personal stakes keep returning

Europe, the account argues, now sits at the center of the global particle physics enterprise. Responsibility for taking the next step may rest heavily on Europe, but the opportunity belongs to everyone who has ever asked what the universe is made of and why it has the structure it does.

The article closes on the idea that incremental progress was once enough: upgrading existing facilities. extending timelines. and squeezing more reach from tunnels already built. But now. the account says. incrementalism is no longer the answer because the field knows what the next machine must do—push both frontiers in turn. The field has identified a preferred path, and it’s no longer just about technical possibility.

The author’s career is described as likely ending around the time the HL-LHC delivers its last collisions. with a sense of privilege in that schedule. The author entered the field in the shadow of the SSC and expects to leave it the same way—never having seen that energy frontier. and likely not seeing the next one either. The emphasis is not on personal arrival at the machine’s peak but on whether the pursuit continues and the tools are built so that those who come after can continue the search.

In the end, the question embedded in the FCC strategy is not only scientific. It’s whether curiosity—expressed through enormous shared engineering projects—will keep getting funded and politically sustained long enough for the next generation of discoveries to happen.

CERN Future Circular Collider FCC Large Hadron Collider LHC HL-LHC particle physics Higgs boson Standard Model 100 TeV superconducting magnets ESPP global science collaboration