Sirunyan, A. M.Işıldak, Bora2021-02-182021-02-182020-11-021029-8479http://hdl.handle.net/10679/7327https://doi.org/10.1007/JHEP11(2020)001The ratios of the production cross sections between the excited gamma(2S) and gamma(3S) mesons and the gamma(1S) ground state, detected via their decay into two muons, are studied as a function of the number of charged particles in the event. The data are from proton-proton collisions at root s = 7TeV, corresponding to an integrated luminosity of 4.8 fb(-1), collected with the CMS detector at the LHC. Evidence of a decrease in these ratios as a function of the particle multiplicity is observed, more pronounced at low transverse momentum p(T)(mu mu). For gamma(nS) mesons with p(T)(mu mu) > 7 GeV, where most of the data were collected, the correlation with multiplicity is studied as a function of the underlying event transverse sphericity and the number of particles in a cone around the gamma(nS) direction. The ratios are found to be multiplicity independent for jet-like events. The mean p(T)(mu mu) values for the gamma(nS) states as a function of particle multiplicity are also measured and found to grow more steeply as their mass increases.engopenAccessarticle1100058512640000110.1007/JHEP11(2020)001B physicsHadron-Hadron scattering (experiments)Particle correlations and fluctuationsQuarkonium2-s2.0-85096395259