Item request has been placed! ×
Item request cannot be made. ×
loading  Processing Request

Extracting the speed of sound in quark-gluon plasma with ultrarelativistic lead-lead collisions at the LHC

Item request has been placed! ×
Item request cannot be made. ×
loading   Processing Request
  • معلومة اضافية
    • Contributors:
      Hayrapetyan, A.; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.; Hussain, P. S.; Jeitler, M.; Krammer, N.; Li, A.; Liko, D.; Mikulec, I.; Schieck, J.; Schoefbeck, R.; Schwarz, D.; Sonawane, M.; Templ, S.; Waltenberger, W.; Wulz, C-E; Darwish, M. R.; Janssen, T.; Van Mechelen, P.; Bols, E. S.; D'Hondt, J.; Dansana, S.; De Moor, A.; Delcourt, M.; El Faham, H.; Lowette, S.; Makarenko, I.; Mueller, D.; Sahasransu, A. R.; Tavernier, S.; Tytgat, M.; Van Onsem, G. P.; Van Putte, S.; Vannerom, D.; Clerbaux, B.; Das, A. K.; De Lentdecker, G.; Favart, L.; Gianneios, P.; Hohov, D.; Jaramillo, J.; Khalilzadeh, A.; Lee, K.; Mahdavikhorrami, M.; Malara, A.; Paredes, S.; Postiau, N.; Thomas, L.; Vanden Bemden, M.; Vander Velde, C.; Vanlaer, P.; De Coen, M.; Dobur, D.; Hong, Y.; Knolle, J.; Lambrecht, L.; Mestdach, G.; Amarilo, K. Mota; Rendon, C.; Samalan, A.; Skovpen, K.; Van den Bossche, N.; van der Linden, J.; Wezenbeek, L.; Benecke, A.; Bethani, A.; Bruno, G.; Caputo, C.; Delaere, C.; Donertas, I. S.; Giammanco, A.; Jaffel, K.; Jain, Sa; Lemaitre, V.; Lidrych, J.; Mastrapasqua, P.; Mondal, K.; Tran, T. T.; Wertz, S.; Alves, G. A.; Coelho, E.; Hensel, C.; Menezes De Oliveira, T.; Moraes, A.; Rebello Teles, P.; Soeiro, M.; Alda Junior, W. L.; Alves Gallo Pereira, M.; Barroso Ferreira Filho, M.; Brandao Malbouisson, H.; Carvalho, W.; Chinellato, J.; Da Costa, E. M.; Da Silveira, G. G.; De Jesus Damiao, D.
    • بيانات النشر:
      IOP Publishing Ltd
    • الموضوع:
      2024
    • Collection:
      Padua Research Archive (IRIS - Università degli Studi di Padova)
    • نبذة مختصرة :
      Ultrarelativistic nuclear collisions create a strongly interacting state of hot and dense quark-gluon matter that exhibits a remarkable collective flow behavior with minimal viscous dissipation. To gain deeper insights into its intrinsic nature and fundamental degrees of freedom, we determine the speed of sound in an extended volume of quark-gluon plasma using lead-lead (PbPb) collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The data were recorded by the CMS experiment at the CERN LHC and correspond to an integrated luminosity of 0.607 nb(-1). The measurement is performed by studying the multiplicity dependence of the average transverse momentum of charged particles emitted in head-on PbPb collisions. Our findings reveal that the speed of sound in this matter is nearly half the speed of light, with a squared value of 0.241 +/- 0.002 (stat) +/- 0.016 9(syst) in natural units. The effective medium temperature, estimated using the mean transverse momentum, is 219 +/- 8 The measured squared speed of sound at this temperature aligns precisely with predictions from lattice quantum chromodynamic (QCD) calculations. This result provides a stringent constraint on the equation of state of the created medium and direct evidence for a deconfined QCD phase being attained in relativistic nuclear collisions.
    • Relation:
      info:eu-repo/semantics/altIdentifier/wos/WOS:001271471000001; volume:87; issue:7; journal:REPORTS ON PROGRESS IN PHYSICS; https://hdl.handle.net/11577/3541164
    • الرقم المعرف:
      10.1088/1361-6633/ad4b9b
    • الدخول الالكتروني :
      https://hdl.handle.net/11577/3541164
      https://doi.org/10.1088/1361-6633/ad4b9b
    • Rights:
      info:eu-repo/semantics/openAccess
    • الرقم المعرف:
      edsbas.4E17E001