LHCb CollaborationAdeva Andany, BernardoÁlvarez Cartelle, PaulaDosil Suárez, ÁlvaroFernández Albor, Víctor ManuelGallas Torreira, Abraham AntonioGarcía Pardiñas, JuliánHernando Morata, José ÁngelPazos Álvarez, AntonioPérez Trigo, EliseoPlo Casasus, MáximoRomero Vidal, AntonioSaborido Silva, Juan JoséSanmartín Sedes, BraisSantamarina Ríos, CibránSeco Miguélez, Marcos AntonioVázquez Regueiro, PabloVázquez Sierra, CarlosVieites Díaz, María2020-04-222020-04-222014Aaij, R., Adeva, B., Adinolfi, M. et al. Study of χb meson production in p p collisions at √s=7 and 8TeV and observation of the decay χb(3P)→Υ(3S)γ . Eur. Phys. J. C 74, 3092 (2014). https://doi.org/10.1140/epjc/s10052-014-3092-z1434-6044http://hdl.handle.net/10347/21621A study of χb meson production at LHCb is performed on proton–proton collision data, corresponding to 3.0 fb−1of integrated luminosity collected at centre-of-mass energies √s= 7 and 8 TeV. The fraction of Υ(nS) mesons originating from χb decays is measured as a function of the Υ transverse momentum in the rapidity range 2.0<yΥ<4.5. The radiative transition of the χb(3P) meson to Υ(3S) is observed for the first time. The χb1(3P) mass is determined to be mχb1(3P)=10511.3±1.7±2.5MeV/c2, where the first uncertainty is statistical and the second is systematic.eng© CERN for the benefit of the LHCb collaboration 2014. This article is published with open access at Springerlink.com. This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited. Funded by SCOAP3 / License Version CC BY 4.0https://creativecommons.org/licenses/by/4.0/journal article10.1140/epjc/s10052-014-3092-z1434-6052open access