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	Author	LHCb Collaboration (Aaij, R. et al); Jaimes Elles, S.J.; Jashal, B.K.; Martinez-Vidal, F.; Oyanguren, A.; Rebollo De Miguel, M.; Sanderswood, I; , Zhuo, J.
	Title	Multiplicity dependence of σψ(2S)/σJ/ψ in pp collisions at √s=13 TeV			Type	Journal Article
	Year	2024	Publication	Journal of High Energy Physics	Abbreviated Journal	J. High Energy Phys.
	Volume	05	Issue	5	Pages	243 - 34pp
	Keywords	Hadron-Hadron Scattering; Particle and Resonance Production; Quarkonium; Relativistic Heavy Ion Physics
	Abstract	The ratio of production cross-sections of psi(2S) over J/psi mesons as a function of charged-particle multiplicity in proton-proton collisions at a centre-of-mass energy root s = 13 TeV is measured with a data sample collected by the LHCb detector, corresponding to an integrated luminosity of 658 pb(-1). The ratio is measured for both prompt and non-prompt psi(2S) and J/psi mesons. When there is an overlap between the rapidity ranges over which multiplicity and charmonia production are measured, a multiplicity-dependent modification of the ratio is observed for prompt mesons. No significant multiplicity dependence is found when the ranges do not overlap. For non-prompt production, the psi(2S)-to- J/psi production ratio is roughly independent of multiplicity, irrespective of the rapidity range over which the multiplicity is measured. The results are compared to predictions of the co-mover model and agree well except in the low multiplicity region. The ratio of production cross-sections of psi(2S) over J/psi mesons are cross-checked with other measurements in di-lepton channels and found to be compatible.
	Address	[Barbetti, M.; Egede, U.; Fujii, Y.; Hadavizadeh, T.; Henderson, R. D. L.; Lane, J. J.; Liu, F. L.; Monk, M.; Song, R.; Walton, E. J.; Ward, J. A.] Monash Univ, Sch Phys & Astron, Melbourne, Vic, Australia, Email: fernando.abudinen@cern.ch
	Corporate Author				Thesis
	Publisher	Springer	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1029-8479	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:001299687500001			Approved	no
	Is ISI	yes	International Collaboration	yes
	Call Number	IFIC @ pastor @			Serial	6501
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