Read article 'Antihydrogen spectroscopy enters precision era'
Measurements of the hydrogen’s spectral structure agree with theoretical predictions to a few parts in 1015. Researchers have long sought to match this precision for antihydrogen.
Read article 'Charm oscillations precisely measured by LHCb'
Direct searches for particles beyond the Standard Model (SM) have so far come up empty handed, but perhaps physicists can get luckier with indirect searches. Quantum mechanics allows neutral flavoured...
Read article 'ATLAS focuses on Higgs-boson decays to vector bosons'
The Higgs-boson decay to two W bosons (H → WW) is the second most common decay mode after its decay to two b quarks.
Read article 'ALICE closes in on parton energy loss'
In Pb-Pb collisions, the spectra are modified by the energy loss that the partons suffer when propagating in the quark-gluon plasma.
Read article 'CMS observes rarest Z boson decay mode'
Theoretical calculations of this process predict a branching fraction of 6.7–7.7 × 10–7.
Read article 'Hubble expansion discrepancy deepens'
Adam Riess from the Space Telescope Science Institute and colleagues have now made a more precise, direct measurement that reinforces the mismatch and could signal new physics.
Read article 'Violette Brisson 1934–2018'
Highly respected member of the French particle-physics community
Read article 'Radio-frequency maestro: Daniel Boussard 1937–2018'
Outstanding inventor and leader
Read article 'Call for input to European strategy update'
The European strategy for particle physics, which is due to be updated by May 2020, will guide the direction of the field to the mid-2020s and beyond.
Read article 'Oddball antics in proton–proton collisions'
The TOTEM collaboration at CERN has uncovered possible evidence for a subatomic three-gluon compound called an odderon, first predicted in 1973.
