% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@MISC{Collaboration:348436,
      author       = {{ALICE Collaboration}},
      title        = {{P}roduction of pions, kaons and protons as a function of
                      the transverse event activity in pp collisions at
                      $\sqrt{s}=13$ {T}e{V}},
      reportid     = {GSI-2024-00272},
      year         = {2023},
      note         = {Journal Article GSI record: GSI-2024-00271},
      abstract     = {The production of $\pi^{\pm}$, $\mathrm{K}^{\pm}$, and
                      $(\mathrm{\overline{p}})\mathrm{p}$ is measured in pp
                      collisions at $\sqrt{s}\,= 13~\mathrm{TeV}$ in different
                      topological regions of the events. Particle transverse
                      momentum $(p_{\mathrm{T}})$ spectra are measured in the
                      ``toward'', ``transverse'', and ``away'' angular regions
                      defined with respect to the direction of the leading
                      particle in the event. While the toward and away regions
                      contain the fragmentation products of the near-side and
                      away-side jets, respectively, the transverse region is
                      dominated by particles from the Underlying Event (UE). The
                      relative transverse activity classifier, $R_{\mathrm{T}} =
                      N_{\mathrm{T}} / \langle N_{\mathrm{T}} \rangle$, is used to
                      group events according to their UE activity, where
                      $N_{\mathrm{T}}$ is the measured charged-particle
                      multiplicity per event in the transverse region and $\langle
                      N_{\mathrm{T}} \rangle$ is the mean value over all the
                      analysed events. The first measurements of identified
                      particle $p_{\mathrm{T}}$ spectra as a function of
                      $R_{\mathrm{T}}$ in the three topological regions are
                      reported. It is found that the yield of high transverse
                      momentum particles relative to the
                      $R_{\mathrm{T}}$-integrated measurement decreases with
                      increasing $R_{\mathrm{T}}$ in both the toward and the away
                      regions, indicating that the softer UE dominates particle
                      production as $R_{\mathrm{T}}$ increases and validating that
                      $R_{\mathrm{T}}$ can be used to control the magnitude of the
                      UE. Conversely, the spectral shapes in the transverse region
                      harden significantly with increasing $R_{\mathrm{T}}$. This
                      hardening follows a mass ordering, being more significant
                      for heavier particles. Finally, it is observed that the
                      $p_{\mathrm{T}}$-differential particle ratios $(\mathrm{p} +
                      \mathrm{\overline{p}})/(\pi^{+} + \pi^{-})$ and
                      $(\mathrm{K}^{+} + \mathrm{K}^{-})/(\pi^{+} + \pi^{-})$ in
                      the low UE limit $(R_{\mathrm{T}} \rightarrow 0)$ approach
                      expectations from Monte Carlo generators such as PYTHIA 8
                      and EPOS LHC, where the jet-fragmentation models have been
                      tuned to reproduce $\mathrm{e}^{+}\mathrm{e}^{-}$ results.},
      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)},
      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},
      experiment   = {EXP:(DE-H253)LHC-Exp-ALICE-20150101},
      typ          = {PUB:(DE-HGF)32},
      doi          = {10.17182/HEPDATA.140124},
      url          = {https://repository.gsi.de/record/348436},
}