Study of ${\chi }_b$ meson production in pp collisions at $\sqrt{s}=7$ and 8TeV and observation of the decay ${\chi }_b\to {\rm Y}(3S)\gamma$

LHCb collaboration, R. Aaij, B. Adeva +698

A study of ${\chi }_b$ meson production at LHCb is performed on proton-proton collision data, corresponding to 3.0fb${}^{-1}$ of integrated luminosity collected at centre-of-mass energie…