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G 2

All articles tagged with #g 2

physics27 days ago•11 min saved

Muon g-2 Mystery Reborn: Lattice QCD Aligns with Experiments, Old Data-Driven Predictions Clash

New lattice QCD calculations explain the muon g-2 excess without invoking new particles, aligning with Fermilab’s precise measurement and challenging the older data-driven predictions that relied on electron-positron collision data; at the same time, fresh VEPP-2000 pion-production results and divergent collider measurements renew tensions across experiments, hinting at either unknown particles or overlooked experimental details and underscoring four decades of conflicting data that physicists still need to resolve.

via Quanta Magazine|

#data-driven-method #g-2 #lattice-qcd

world3 months ago•9 min saved

Beijing Summit Recasts U.S.-China Ties as G-2 Parity

At a high-profile Beijing summit, Xi Jinping and Donald Trump portrayed the United States and China as equally dominant powers, reviving the idea of a G-2. The talks yielded trade promises (including China buying Boeing jets and U.S. agricultural products) and discussions on artificial intelligence, but produced no decisive policy breakthroughs on Iran, Taiwan, or security, signaling a focus on optics and multipolar balance over immediate concessions.

via The Washington Post|

#ai #g-2 #taiwan

science4 months ago•9 min saved

Muon g-2 Mystery Reconciled as Standard Model Gains Ground

A long-standing puzzle about the muon's anomalous magnetic moment (g-2) is resolved by a new, ultra-precise lattice QCD calculation that aligns the Standard Model prediction with experimental measurements within half a standard deviation. The result removes the need for a hypothetical fifth force and reinforces quantum field theory as the foundation of particle physics, though it may still leave a narrow window for new physics to appear in future experiments.

via SciTechDaily|

#g-2 #lattice-qcd #muon