Read article 'The Milky Way’s dark-matter halo reappears'
Back in April, a study of the motion of hundreds of stars in the Milky Way found no evidence of a massive dark-matter halo (CERN Courier June 2012 p11). The finding came as a surprise and did not long...
Read article 'IceCube observations challenge ideas on cosmic-ray origins'
The IceCube collaboration, with a detector that looks at a cubic kilometre of ice at the South Pole, has searched for evidence of neutrinos associated with gamma-ray bursts (GRBs).
Read article 'CMS discovers the Ξb*0'
The new state is observed with a significance exceeding 5σ and a mass of 5945.0 ± 2.8 MeV.
Read article 'Dijets confirm the Standard Model'
Dijet measurements provide an excellent tool not only to probe high transverse-momentum parton interactions to study QCD but also to look for signs of new phenomena beyond the Standard Model.
Read article 'Deferred triggering optimizes CPU use'
Like all of the LHC experiments, LHCb relies on a tremendous amount of CPU power to select interesting events out of the many millions that the LHC produces every second.
Read article 'Ramping up to higher luminosity'
After a flying start, with the first stable beams at the new energy of 4 TeV on 5 April, the LHC successfully operated with 1380 bunches per beam – the maximum planned for 2012 – on 18 April.
Read article 'RENO observes disappearance of electron-antineutrinos'
The Reactor Experiment for Neutrino Oscillations (RENO) has performed a definitive measurement of the neutrino-oscillation mixing angle.
Read article 'Hungary to host extension to CERN data centre'
Following a competitive call for tender, CERN has signed a contract with the Wigner Research Centre for Physics in Budapest for an extension to CERN’s data centre.
Read article 'Black hole is seen feasting on a stellar core'
Astronomers have gathered the most direct evidence yet of a supermassive black hole shredding a star that wandered too close to it. By following the event over hundreds of days they could identify for...
Read article 'LHC yields data rapidly at new collision energy of 8 TeV'
At 12.38 a.m. on 5 April, the LHC shift crew declared "stable beams" as two 4 TeV proton beams were brought into collision at the LHC’s four interaction points.
