Yetkin, Elif Aslı2020-06-172020-06-172018-08-291079-71140031-9007https://hdl.handle.net/11411/2235https://doi.org/10.1103/PhysRevLett.121.092002The chi(b1)(3P) and chi(b2)(3P) states are observed through their gamma(3S)(gamma) decays, using an event sample of proton-proton collisions collected by the CMS experiment at the CERN LHC. The data were collected at a center-of-mass energy of 13 TeV and correspond to an integrated luminosity of 80.0 fb(-1). The gamma(3S) mesons are identified through their dimuon decay channel, while the low-energy photons are detected after converting to e(+)e(-) pairs in the silicon tracker, leading to a chi(b)(3P) mass resolution of 2.2 MeV. This is the first time that the J = 1 and 2 states are well resolved and their masses individually measured: 10513.42 +/- 0.41(stat) +/- 0.18(syst) MeV and 10524.02 +/- 0.57(stat) +/- 0.18(syst) MeV; they are determined with respect to the world-average value of gamma(3S) mass, which has an uncertainty of 0.5 MeV. The mass splitting is measured to be 10.60 +/- 0.64(stat) +/- 0.17(syst) MeV.eninfo:eu-repo/semantics/openAccessBOTTOMONIUM SPECTRUMHEAVYQCDArticle2-s2.0-8505328411810.1103/PhysRevLett.121.09200230230889Q1WOS:000443098800003