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- W4225434110 abstract "Production cross sections of $Upsilon$(1S), $Upsilon$(2S), and $Upsilon$(3S) states decaying into muplusmuminus in proton-lead (pPb) collisions are reported using data collected by the CMS experiment at$sqrt{s_mathrm{NN}}$ = 5.02 TeV. A comparison is made with corresponding cross sections obtained with pp data measured at the same collision energy and scaled by the Pb nucleus mass number. The nuclear modification factor for $Upsilon$(1S) is found to be $R_mathrm{pPb}(Upsilon(1S))$ = 0.806 $pm$ 0.024 (stat) $pm$ 0.059 (syst). Similar results for the excited states indicate a sequential suppression pattern, such that $R_mathrm{pPb}(Upsilon(1S)) gt R_mathrm{pPb}(Upsilon(2S)) gt R_mathrm{pPb}(Upsilon(3S))$. The suppression is much less pronounced in pPb than in PbPb collisions, and independent of transverse momentum $p_mathrm{T}^Upsilon$ and center-of-mass rapidity $y_mathrm{CM}^Upsilon$ of the individual $Upsilon$ state in the studied range $p_mathrm{T}^Upsilon lt $ 30 GeV$/c$ and $vert y_mathrm{CM}^Upsilonvert lt$ 1.93. Models that incorporate sequential suppression of bottomonia in pPb collisions are in better agreement with the data than those which only assume initial-state modifications." @default.
- W4225434110 created "2022-05-05" @default.
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