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希格斯玻色子衰变为缪子对再现新证据
Ke Ji Ri Bao· 2025-09-04 09:43
Core Insights - The ATLAS collaboration at CERN has announced stronger evidence for the decay of the Higgs boson into a pair of muons, with a significance level increased to 3.4 standard deviations, indicating a random error probability of less than 0.3% [1][2] - The research team is also investigating a rarer decay process of the Higgs boson into a Z boson and a photon, which could provide clues for new physics beyond the Standard Model [1] Summary by Categories Higgs Boson Decay Observations - The ATLAS collaboration has improved the significance of the Higgs boson decaying into muon pairs from an initial 2 standard deviations to 3.4 standard deviations, enhancing the reliability of the findings [2] - The decay of the Higgs boson into muon pairs occurs approximately once in every 5000 Higgs decays, providing a critical window for understanding the coupling of the Higgs field with second-generation fermions [1] New Physics Exploration - The team is also focusing on the decay of the Higgs boson into a Z boson and a photon, which may involve unknown new particles and could reveal phenomena beyond the Standard Model of particle physics [1] - The Z boson further decays into electron or muon pairs, and the decay mechanism involves a virtual particle loop, indicating potential new physics [1]