Study of $\chi_b$ Meson Spectroscopy and Production in pp collisions at $\sqrt{s}= 7 and 8TeV at LHCb

A study of χb meson spectroscopy and production at LHCb is performed on proton-proton collision data, corresponding to 3.0 fb−1 of integrated luminosity collected at centre-of-mass energies = 7 and 8 TeV. The fraction of γ(nS) mesons originating from χb decays is measured as a function of the γ transverse momentum in the rapidity range 2.0 < yγ < 4.5. The radiative transition of the χb(3P) meson to γ(3S) is observed for the first time. The γb1(3P) mass is determined to be where the first uncertainty is statistical and the second is systematic.