One of the fundamental forces is stronger than we thought — SkimNews
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- Alessandro Conigli at Johannes Gutenberg University Mainz and colleagues used lattice quantum chromodynamics (QCD) to calculate two numbers capturing how virtual particle-antiparticle pairs affect the electroweak force's strength at different energy levels.
- The team's lattice QCD results differed from traditional "phenomenological" calculations by around 1%, while also halving the error margin in those calculations.
- The same lattice QCD technique resolved a 2024 discrepancy involving muons that had appeared to conflict with theoretical calculations after an experiment called the phenomenological method into question.
- Colin Morningstar at Carnegie Mellon University said the calculated properties are "badly needed" to aid experimental searches for new particles and added: "I applaud the work very heartily."
- Krishna Kumar at the University of Massachusetts Amherst said the biggest implications would be for future colliders such as the proposed Future Circular Collider, which would surpass the precision of existing experiments.
- The electroweak force unifies the electromagnetic and weak nuclear forces, which behave distinctly under ordinary conditions but combine at extreme energies like those in particle colliders and the early universe.
- The standard model of particle physics currently does not explain dark matter, making the precision calculations relevant for searches beyond current theory.
Why it matters: Particle physicists gain a ~1% sharper measurement of the electroweak force with errors halved, giving future colliders like the proposed Future Circular Collider the theoretical precision needed to interpret measurements that could expose physics beyond the Standard Model. No new particles have been detected — the value lies in sharper benchmarks for experiments not yet built.
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