Tag: #particlephysics

SIDDHARTA-2 reports first X-ray observation of kaonic deuterium

SIDDHARTA-2 reports the first X-ray observation of kaonic deuterium at DAΦNE, measuring the 1s energy shift and width and filling a five-decade data gap.

#kaonicdeuterium, #kaon, #particlephysics, #nuclearphysics

XENONnT's Ionization-Only Search Tightens Limits on Few‑GeV Dark Matter

XENONnT's 7.8 tonne‑year ionization‑only search finds no dark‑matter signal, setting stronger limits on few‑GeV candidates and edging toward the solar‑neutrino floor.

#darkmatter, #xenonnt, #particlephysics, #neutrinos

New calculation narrows muon g-2 anomaly and refocuses debate on hadronic inputs

A 2026 Nature calculation brings the Standard Model into agreement with muon g‑2 measurements, shifting the controversy to hadronic vacuum polarization inputs.

#muon, #g2, #particlephysics, #standardmodel, #hvp

Revised DESI reanalysis suggests unusually tight cosmological bounds on neutrino mass, favors normal ordering

A revised DESI reanalysis reports unusually tight cosmological limits on the sum of neutrino masses that favor the normal ordering, but the result is preliminary.

#neutrinos, #cosmology, #desi, #particlephysics

AI Agents Reproduce and Extend CERN Analyses, Claim First AI-Produced Novel Result on LEP Data

Researchers using Anthropic’s Claude Code ran end-to-end collider analyses on public CERN data, releasing code and claiming an AI-produced novel Lund-plane result.

#ai, #particlephysics, #cern, #claudecode

One‑Positron Quantum Cyclotron Demonstrated, Paving Way for More Precise Positron g‑Factor Tests

A Northwestern-led preprint reports trapping a single positron in a quantum cyclotron — a technical step toward higher‑precision tests of the positron’s magnetic moment and CPT symmetry.

#physics, #antimatter, #particlephysics, #precision