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@ARTICLE{Aad:588906,
      author       = {Aad, Georges and others},
      collaboration = {{ATLAS Collaboration}},
      title        = {{M}easurement of the {S}ensitivity of {T}wo-{P}article
                      {C}orrelations in $pp$ {C}ollisions to the {P}resence of
                      {H}ard {S}catterings},
      reportid     = {PUBDB-2023-05030, arXiv:2303.17357. CERN-EP-2023-036},
      year         = {2023},
      note         = {33 pages in total, author list starting page 16, 6 figures,
                      submitted to Phys. Rev. Lett. All figures including
                      auxiliary figures are available at
                      https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2021-08},
      abstract     = {A key open question in the study of multi-particle
                      production in high-energy $pp$ collisions is the
                      relationship between the 'ridge'' - observed azimuthal
                      correlations between particles in the underlying event that
                      extend over all rapidities - and hard or semi-hard
                      scattering processes. In particular, it is not known whether
                      jets or their soft fragments are correlated with particles
                      in the underlying event. To address this question,
                      two-particle correlations are measured in $pp$ collisions at
                      $\sqrt{s}=13$ TeV using data collected by the ATLAS
                      experiment at the LHC, with an integrated luminosity of
                      $15.8$$\mathrm{pb}^{-1}$, in two different configurations.
                      In the first case, charged particles associated with jets
                      are excluded from the correlation analysis, while in the
                      second case, correlations are measured between particles
                      within jets and charged particles from the underlying event.
                      Second-order flow coefficients, $v_2$, are presented as a
                      function of event multiplicity and transverse momentum.
                      These measurements show that excluding particles associated
                      with jets does not affect the measured correlations.
                      Moreover, particles associated with jets do not exhibit any
                      significant azimuthal correlations with the underlying
                      event, ruling out hard processes contributing to the ridge.},
      keywords     = {experimental results (INSPIRE) / correlation: two-particle
                      (INSPIRE) / correlation: measured (INSPIRE) / p p:
                      scattering (INSPIRE) / underlying event (INSPIRE) / charged
                      particle (INSPIRE) / jet (INSPIRE) / angular correlation
                      (INSPIRE) / sensitivity (INSPIRE) / flow (INSPIRE) /
                      transverse momentum (INSPIRE) / hard scattering (INSPIRE) /
                      CERN LHC Coll (INSPIRE) / rapidity (INSPIRE) / multiplicity
                      (INSPIRE) / ATLAS (INSPIRE)},
      cin          = {ATLAS},
      cid          = {I:(DE-H253)ATLAS-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611)},
      pid          = {G:(DE-HGF)POF4-611},
      experiment   = {EXP:(DE-H253)LHC-Exp-ATLAS-20150101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2303.17357},
      howpublished = {arXiv:2303.17357},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2303.17357;\%\%$},
      doi          = {10.3204/PUBDB-2023-05030},
      url          = {https://bib-pubdb1.desy.de/record/588906},
}