Compact Muon Solenoid
LHC, CERN
Visit us: CMS Public Website, CMS Physics ;
Contact us: CMS Publications Committee
| CMS-PAS-BPH-14-009 | ||
| Dependence of the $\Upsilon$(nS) production ratios on charged particle multiplicity in pp collisions at $\sqrt{s}= $ 7 TeV | ||
| CMS Collaboration | ||
| October 2016 | ||
| Abstract: 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_{\mathrm{T}}> $ 0.4 GeV and $|\eta|< $ 2.4 produced in pp collisions at $\sqrt{s}= $ 7 TeV. Evidence of a decrease of the ratios between the higher and the lower mass states is observed, that is more pronounced at lower $p_{\mathrm{T}}$. For $\Upsilon$(nS) mesons of transverse momentum greater than 7 GeV, this effect is studied as a function of the underlying event sphericity, and of the distribution of charged particles with respect to the $\Upsilon$(nS) direction. | ||
|
Links:
CDS record (PDF) ;
inSPIRE record ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, JHEP 11 (2020) 001. The superseded preliminary plots can be found here. |
||
|
|
Compact Muon Solenoid LHC, CERN |
|
|
|
|
|
|