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@MISC{Collaboration:356869,
      author       = {{ALICE Collaboration}},
      title        = {$\psi(2{S})$ suppression in {P}b-{P}b collisions at the
                      {LHC}},
      reportid     = {GSI-2025-00252},
      year         = {2023},
      note         = {Journal Article GSI record: GSI-2025-00251},
      abstract     = {CERN-LHC-ALICE. The production of the $\psi(2S)$ charmonium
                      state was measured with ALICE in Pb--Pb collisions at
                      $\sqrt{s_{\rm NN}}=5.02$ TeV, in the dimuon decay channel. A
                      significant signal was observed for the first time at LHC
                      energies down to zero transverse momentum, at forward
                      rapidity ($2.5<y<4$). The measurement of the ratio of the
                      inclusive production cross sections of the $\psi(2S)$ and
                      J/$\psi$ resonances is reported as a function of the
                      centrality of the collisions and of transverse momentum, in
                      the region $p_{\rm T}<12$ GeV/$c$. The results are compared
                      with the corresponding measurements in pp collisions, by
                      forming the double ratio
                      $[\sigma^{\psi(2S)}/\sigma^{J/\psi}]_{\rm{Pb-Pb}}/[\sigma^{\psi(2S)}/\sigma^{J/\psi}]_{\rm{pp}}$.
                      The $\psi(2S)$ nuclear modification factor $R_{\rm AA}$ was
                      also obtained as a function of both centrality and $p_{\rm
                      T}$. The results show that the $\psi(2S)$ resonance yield is
                      strongly suppressed in Pb--Pb collisions, by a factor up to
                      $\sim 3$ with respect to pp. Furthermore, the $\psi(2S)$
                      suppression in Pb--Pb collisions is stronger than the one
                      observed for the J/$\psi$ by a factor $\sim 2$. Comparisons
                      of cross section ratios with previous SPS findings by the
                      NA50 experiment, and of $R_{\rm AA}$ with higher-$p_{\rm T}$
                      results at LHC energy are also reported. These results and
                      the corresponding comparisons with calculations of transport
                      and statistical models address questions on the presence and
                      properties of charmonium states in the quark--gluon plasma
                      formed in nuclear collisions at the LHC.},
      cin          = {ALI / DTL / CIT / EXM / ALICE@CERN},
      cid          = {I:(DE-Ds200)ALI-20080822OR105 /
                      I:(DE-Ds200)DTL-20051214OR031 /
                      I:(DE-Ds200)CIT-20110310OR121 /
                      I:(DE-Ds200)EXM-20080818OR100 / I:(DE-Ds200)Coll-CERN-ALICE},
      pnm          = {612 - Cosmic Matter in the Laboratory (POF4-612) / HGS-HIRe
                      - HGS-HIRe for FAIR (HGS-HIRe) / SUC-GSI-Heidelberg -
                      Strategic university cooperation GSI-U Heidelberg
                      (SUC-GSI-HE) / SUC-GSI-Frankfurt - Strategic university
                      cooperation GSI-U Frankfurt/M (SUC-GSI-FR) /
                      SUC-GSI-Darmstadt - Strategic university cooperation GSI-TU
                      Darmstadt (SUC-GSI-DA) / STRONG-2020 - The strong
                      interaction at the frontier of knowledge: fundamental
                      research and applications (824093)},
      pid          = {G:(DE-HGF)POF4-612 / G:(DE-Ds200)HGS-HIRe /
                      G:(DE-Ds200)SUC-GSI-HE / G:(DE-Ds200)SUC-GSI-FR /
                      G:(DE-Ds200)SUC-GSI-DA / G:(EU-Grant)824093},
      experiment   = {EXP:(DE-H253)LHC-Exp-ALICE-20150101},
      typ          = {PUB:(DE-HGF)32},
      doi          = {10.17182/HEPDATA.145654},
      url          = {https://repository.gsi.de/record/356869},
}