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Dependence of the $\Upsilon$(nS) production ratios on charged particle multiplicity in pp collisions at $\sqrt{s}=7~\mathrm{TeV}$
The ratios of the cross section of the $\Upsilon$(nS) mesons with $|y|<1.2$ are studied as a function of the number of charged particles with $p_{T}>0.4~\mathrm{GeV}$ and $|\eta|<2.4$ produced in pp collisions at $\sqrt{s}=7~\mathrm{TeV}$. Evidence of a decrease of the ratios between the hi...
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2016
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| Acceso en línea: | http://cds.cern.ch/record/2223879 |