Why Broken Symmetry Built the Universe
The Mystery at the Heart of Existence There is a paradox at the foundation of reality, one that physicists have spent decades learning to live with: the universe exists because of imperfection. Imagine a…
Field
Particle Physics
Neutrino mass: the sky and the laboratory still disagree
Cosmology's bound has fallen beneath the floor oscillations impose. One of the two pictures is wrong.
Nineteen numbers, seventeen particles, one theory that will not break
The theory rests on nineteen numbers no one can derive from anything deeper, and it has survived every test aimed at it, including the…
JUNO beat every previous measurement in 59 days. Its real target is still years away.
The commissioning paper reports 1785 photoelectrons per MeV, 20.6 m scintillator transparency and uranium below 10⁻¹⁶ g/g. The first physics paper reports the world's…
A particle made of nothing but force
Gluons pull on each other, so they should be able to bind into a particle with no quarks at all. BESIII says X(2370) is…
Six antineutrinos a day, measured from a reactor that had been switched off for weeks
A pressurised water reactor that has been offline for three weeks still sends about six antineutrino events a day into a detector 400 metres…
The fourth neutrino was excluded at 99.99%. The anomalies are still there.
A fourth neutrino that feels no weak force explained thirty years of anomalies. MicroBooNE excluded it at 95% confidence and KATRIN found no kink…
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