I discuss a new approach to systematically expand LHC cross sections around a kinematic limit where all final state radiation is collinear to one of the scattering protons. In particular, I show how such an expansion can provide an effect
The discovery of a narrow charmonium-like state above the open charm threshold in 2001 has triggered a renaissance for hadron spectroscopy. Despite almost two decades of careful studies the nature of this meson, called χc1(3872) is still under debate. LHCb has de
