What Has CERN Actually Discovered, and Why Does It Matter Beyond Physics Labs?

Written by OC Wanderer, author of Destiny Among the Stars, a LitRPG sci-fi series set in the real stellar neighborhood. Published August 26, 2026.

Light is the speed limit, as we discovered last time, because c is the speed of cause and effect. Pushing a massive object closer to it demands ever more energy, and a faster signal could let a reply arrive before its question. That is a wonderfully awkward rule for a science fiction author who wants his crew to visit other stars. I wonder where we would catch the first crack, if one exists.

CERN, the European laboratory near Geneva, seems an obvious place to watch. Its accelerators push particles almost to light speed, and once a beam from CERN really did seem to beat it. I would love a discovery that gave starship designers a new rule to work with. So far, though, CERN has found no route around the limit, and even a genuine surprise in a detector would leave us a long way from building a drive.

Almost light speed, lap after lap

The Large Hadron Collider (LHC) brings that elusive finish line tantalizingly close. Each proton carries 6.8 trillion electron-volts of energy, a unit physicists use for individual particles.¹ That is about 7,200 times the energy locked in a proton's mass, yet its speed falls about 3 meters per second short of light, out of 300 million.² Pouring in more energy barely closes the gap. The accelerating cavities supply the energy and the magnets keep the beam on course; the protons keep behaving as relativity predicts.³ Imagine trying to explain to a starship captain why another enormous energy bill has bought so little extra speed.

Time dilation gives us something more useful to dream about. A muon, a heavy cousin of the electron, normally lasts just 2.2 millionths of a second. In CERN's 1977 storage-ring experiment, muons circling at 99.94 percent of light speed lasted about 64 millionths, roughly 29 times longer, as Einstein's formula predicts.⁴ A few millionths of a second sounds tiny until you picture the same difference on a voyage: the travelers and the people waiting at home would live through very different amounts of time. The universe really does allow that part of the science fiction dream.

In Destiny Among the Stars, CERN holds a more tempting prize. Karen tells the crew in Book 4 where the faster-than-light (FTL) drive they need to scan is: "The Large Hadron Collider. CERN, in Switzerland. Underground, maximum security, completely classified." I like the tension of putting that fictional escape route beside a real machine whose particles keep obeying the limit.

The beam that seemed to beat light

For a moment in 2011, the exciting question was whether a beam had already found the crack. An experiment called OPERA reported that neutrinos from CERN, nearly massless particles that pass through rock almost untouched, had crossed 730 kilometers underground to Italy's Gran Sasso laboratory and arrived about 60 billionths of a second early.⁵ Light covers 18 meters in that time. The claim depended on clocks at opposite ends of the trip agreeing well enough to detect that tiny lead.⁶

OPERA had checked the measurement for months and asked other physicists to help find what it might have missed. CERN's research director said the result could change our view of physics if it held, but ordinary explanations needed to be ruled out first.⁷ That is the delicious difficulty here: a revolution in spacetime and a problem with a clock can initially look much the same.

The crucial problem turned up in the timing system. Gran Sasso's clock received its GPS signal through an 8.3 kilometer optical fibre, and a poorly connected cable had added about 73 nanoseconds to the delay. The team also found and corrected a master-clock oscillator error.⁸ The cable delay alone was larger than the apparent neutrino lead. Before rewriting relativity, someone needed to check the connector.

Independent clocks provided the test I would want before celebrating. ICARUS, another experiment at Gran Sasso, measured a dedicated beam of short pulses and found arrival times consistent with light speed.⁹ OPERA's corrected analysis agreed, as did the other Gran Sasso experiments.¹⁰¹¹ I would still love to see a real surprise survive that kind of scrutiny. This one taught us how easily the measuring apparatus can supply the surprise instead.

Finding particles we had only imagined

CERN's discoveries are thrilling even without an FTL loophole. A theory can tell physicists to look for something nobody has yet seen, and collisions can leave evidence that it exists. The challenge is finding a convincing excess among all the familiar particles those collisions produce.

In 1973, Gargamelle saw neutrinos scatter off matter through the weak neutral currents the theory had predicted.¹² A decade later, UA1 and UA2 found the W and Z particles that carry the weak force.¹³ Then, in 2012, ATLAS and CMS each found the excess near 125 giga-electron-volts that matched the Higgs boson, proposed back in 1964.¹⁴¹⁵ Imagine waiting almost half a century to find out whether a particle in your equations would finally appear in the detectors. Those discoveries helped fill in the Standard Model, our theory of the known particles and forces, without breaking relativity's speed limit.

The gaps are fascinating too. The Standard Model leaves out gravity and cannot tell us what dark matter is or explain the matter-antimatter imbalance after the Big Bang.¹⁶ I wonder what a more complete picture will let us understand. Dark matter alone gives us plenty to explore, even before we ask what any new physics might do for a ship.

A discovery is a long way from an engine

Suppose a future experiment does reveal something new about spacetime. I would immediately want to know whether we could do anything with it. Protons from the LHC's two beams collide at 13.6 trillion electron-volts, but CERN compares that collision energy to a needle falling a few centimeters onto the floor. The extraordinary part is how tightly that energy is concentrated.¹⁷ Scaling a discovery up to a ship is another adventure entirely. Under ordinary relativity, the ship at 99.92 percent of light speed in my last post carries about 516 megatons of TNT of kinetic energy per kilogram.¹⁸ A new theory would have to tell us what is possible; engineers would still need to supply and control whatever energy its engine demanded.

My crew gets a fictional shortcut that makes me envy them. In Book 4, Karen supplies the tunnel route, patrol schedules and location of the FTL drive in ECN3. She leaves out the other stored technology: a ring fragment, cloaking emitters and the fact that CERN has become "a stockpile for System portal drops nobody on Earth could reverse-engineer." Ryan's proposal is to get close enough for their multitools to scan the drive and generate its fabrication schematic. How tempting would that be: a working device, the tools to copy it, and the physics still waiting to be understood?

So what has CERN found?

CERN has made imagined particles into experimental discoveries while leaving the light-speed limit intact. That is already an extraordinary achievement. As a science fiction author, I can enjoy what the laboratory has actually found and still hope for a result that opens a door we have not thought to try. I would want to see that result survive independent detectors and independent clocks before asking what it could mean for a crew heading to another star.

Some speeds in nature do measure above c, and the first is a shadow: is darkness faster than light?

Endnotes

1. CERN, “The Large Hadron Collider”: circumference 26,659 m (26.7 km); nominal 6.8 TeV per beam; 11,245 turns per second. ↩

2. Author calculation: γ = 6,800 GeV / 0.938 GeV (proton rest energy) = 7,247; speed shortfall from c is about c/(2γ²) = 2.85 m/s. ↩

3. CERN, “The Large Hadron Collider” (turns per second). ↩

4. J. Bailey et al., “Measurements of relativistic time dilatation for positive and negative muons in a circular orbit,” Nature 268 (1977), 301–305, DOI: γ = 29.33; τ+ = 64.419 ± 0.058 µs; rest lifetime about 2.19 µs; muon speed about 99.94% of c; time dilation agrees with a fractional error of 2 × 10⁻³ (95% confidence). The speed 0.99942c is an author calculation from γ; 64.4 / 2.19 µs = 29.4. ↩

5. CERN, “OPERA experiment reports anomaly in flight time of neutrinos from CERN to Gran Sasso,” press release, September 2011 (over 15,000 events; 20 parts per million; 730 km; light-speed trip time about 2.4 ms). OPERA Collaboration, “Measurement of the neutrino velocity with the OPERA detector in the CNGS beam,” first version, arXiv:1109.4897v1: early arrival (60.7 ± 6.9 stat. ± 7.4 sys.) ns. ↩

6. Author calculation: 60 ns × 299,792,458 m/s = 18 m; 730 km / c = 2.44 ms. The press release above gives the distance uncertainty (20 cm) and the timing accuracy (under 10 ns). ↩

7. CERN press release, September 2011 (link above): the collaboration opened the result to broader scrutiny, and the research director said independent measurements were needed and more mundane explanations had to be excluded. ↩

8. OPERA Collaboration, “Measurement of the neutrino velocity with the OPERA detector in the CNGS beam,” JHEP 10 (2012) 093, arXiv:1109.4897, section 6.1: fibre delay 73.2 ns larger than in 2006–2007; cause traced by mid-February 2012 to an optical cable not properly connected; the master-clock oscillator also ran 0.124 ppm above specification, which the collaboration corrected. ↩

9. ICARUS Collaboration, “Measurement of the neutrino velocity with the ICARUS detector at the CNGS beam,” Physics Letters B 713 (2012) 17, arXiv:1203.3433: 7 events, time of flight difference 0.3 ± 4.9 (stat.) ± 9.0 (syst.) ns, in a run with 3 ns pulses separated by 524 ns. ↩

10. OPERA Collaboration, arXiv:1109.4897 (final version: arrival time relative to light (6.5 ± 7.4 stat., +8.3/−8.0 syst.) ns); OPERA Collaboration, JHEP 01 (2013) 153, arXiv:1212.1276 (dedicated 2012 data, consistent with light speed). ↩

11. CERN, “Neutrinos sent from CERN to Gran Sasso respect the cosmic speed limit, experiments confirm,” press release, 8 June 2012, on Borexino, ICARUS, LVD and OPERA, reachable from the CERN OPERA news page. ↩

12. F. J. Hasert et al., “Observation of Neutrino-Like Interactions Without Muon or Electron in the Gargamelle Neutrino Experiment,” Physics Letters B 46 (1973): 138–140, DOI (the events were weak neutral currents, predicted by the theory joining electromagnetism and the weak force); CERN, “50 years of giant electroweak discoveries,” 2023. ↩

13. CERN, “50 years of giant electroweak discoveries,” 2023: UA1 and UA2 at the converted Super Proton Synchrotron, run as a proton-antiproton collider. ↩

14. ATLAS Collaboration, Physics Letters B 716 (2012): 1–29, DOI; CMS Collaboration, Physics Letters B 716 (2012): 30–61, DOI; CERN, “The Higgs boson” (proposed 1964; announced 4 July 2012; mass 125 GeV). ↩

15. Author calculation: the one-sided tail of the normal distribution beyond 5 standard deviations is 2.87 × 10⁻⁷, about 1 in 3.5 million. ATLAS reported 5.9 sigma local significance and CMS 5.0 (papers in the previous note). ↩

16. CERN, “The Standard Model”: gravity omitted; dark matter, the matter-antimatter imbalance and the generation hierarchy unexplained; the model is incomplete. ↩

17. CERN, “The Large Hadron Collider”: 13.6 TeV collision energy, compared with a needle falling a few centimeters, concentrated in a space ten trillion times smaller than the needle. ↩

18. Author calculation from my last post: kinetic energy per kilogram (γ − 1)c² with γ = 25 is about 516 megatons of TNT at 4.184 × 10¹⁵ J per megaton (NIST). ↩