Read article 'CMS undergoes tracker transplant'
At the beginning of March, the CMS collaboration successfully replaced the heart of its detector: the pixel tracker. This innermost layer of the CMS detector, a cylindrical device containing 124 milli...
Read article 'ATLAS reveals more strangeness in the proton'
The excellent theoretical understanding of the production of electroweak W and Z gauge bosons in proton–proton collisions at the LHC makes these “standard-candle” processes ideal for studying th...
Read article 'ALICE measures shape of the QGP fireball at freeze-out'
Heavy-ion collisions at LHC energies create a hot and dense medium of deconfined quarks and gluons, known as the quark–gluon plasma (QGP). The QGP fireball first expands, cools and then freezes out ...
Read article 'Rare decay puts Standard Model on the spot'
The decay rate of the B0s meson to two muons is a flagship measurement in flavour physics. It is extremely rare and well predicted in the Standard Model (SM), with a branching fraction of (3.65±0.23)...
Read article 'BaBar casts further doubt on dark photons'
Dark photons, are hypothetical low-mass spin-1 particles that couple to dark matter but have vanishing couplings with normal matter. Such a boson, which may be associated with a U(1) gauge symmetry in...
Read article 'Gravitational lens challenges cosmic expansion'
An international group of astronomers has made an independent measurement of how fast the universe is expanding.
Read article 'BASE boosts precision of antiproton magnetic moment'
The measurement shows that the magnetic g-factors are identical within 0.8 parts per million.
Read article 'SESAME sees first beam'
Late in the evening of 12 January, a beam of electrons circulated for the first time in the SESAME light source in Jordan. Following the first single turn, the next steps will be to achieve multi-tur...
Read article 'Machine technical stop in full swing'
Following a record year of proton–proton operations at the LHC in 2016, which was followed by a successful proton–lead run, on 5 December 2016 the machine entered a longer than usual winter shutd...
Read article 'LHCb sees first hints of CP violation in baryons'
The LHCb experiment has uncovered tantalising evidence that baryons made of matter behave differently to those made of antimatter, violating fundamental charge-parity (CP) symmetry. Although CP-violat...
