Read article 'First full jet measurement in Pb–Pb collisions with ALICE'
In high-energy collisions at the LHC, quarks and gluons occasionally scatter violently and produce correlated showers of particles, or “jets”. In proton–proton collisions, the rate o...
Read article 'COMPASS measures the pion polarizability'
The COMPASS experiment at CERN has made the first precise measurement of the polarizability of the pion – the lightest composite particle built from quarks.
Read article 'CMS heads towards solving a decades-long quarkonium puzzle'
Quarkonia – charm or beauty quark/antiquark bound states – are prototypes of elementary systems governed by the strong force.
Read article 'ALICE sheds light on particle production in heavy-ion collisions'
New results from the ALICE collaboration are providing additional data to test ideas about how particles are produced out of the quark–gluon plasma (QGP) created in heavy-ion collisions at the L...
Read article 'CMS measures the ‘underlying event’ in pp collisions'
Ever since the earliest experiments with hadron beams, and subsequently during the era of the hadron colliders heralded by CERN’s Intersecting Storage Rings, it has been clear that hadron collisions...
Read article 'LHCb observes two new strange-beauty baryons'
Predicted to exist by the quark model, they are both baryons containing three quarks, in this case, b, s and d.
Read article 'Profiling jets with ALICE'
Scaled pT spectra of charged particles in jets for different bins of jet transverse momentum. “Jets are collimated sprays of particles.” This ubiquitous characterization used in man...
Read article 'Nuclei come under the microscope in California'
It has long been known that, when they are put under a sufficiently energetic microscope, nuclei reveal a complicated structure – the more energetic the probe, the more complex the structure.
Read article 'ALICE probes the role of minijets in p–Pb collisions…'
One of the hottest topics at the LHC is the understanding of potential collective effects in proton–lead collisions, prompted by the discovery of ridge structures in angular correlations of part...
Read article '…and investigates suppression of ψ(2S)'
Charmonia, bound states of charm and anti-charm quarks, are probes for the formation of hot quark–gluon plasma (QGP) in heavy-ion collisions.
