Artigo de periodico

Jet-like correlations with neutral pion triggers in pp and central Pb–Pb collisions at 2.76 TeV (2016)

• Authors:
  • Adam, J - Czech Technical University in Prague (CTU)
  • Prado, Caio Alves Garcia
  • Bregant, Marco
  • Cosentino, Mauro Rogério
  • Figueredo, Marcel Araujo Silva
  • Jahnke, Cristiane
  • Lagana Fernandes, Caio
  • Munhoz, Marcelo Gameiro
  • Silva, Antonio Carlos Oliveira da
  • Suaide, Alexandre Alarcon do Passo
• USP affiliated authors: BREGANT, MARCO - IF ; MUNHOZ, MARCELO GAMEIRO - IF ; SUAIDE, ALEXANDRE ALARCON DO PASSO - IF
• Unidade: IF
• DOI: 10.1016/j.physletb.2016.10.048
• Assunto: COLISÕES DE ÍONS PESADOS RELATIVÍSTICOS
• Language: Inglês
• Abstract: We present measurements of two-particle correlations with neutral pion trigger particles of transverse momenta 8 < ptrig T < 16 GeV/c and associated charged particles of 0.5 < passoc T < 10 GeV/c versus the azimuthal angle difference ϕ at midrapidity in pp and central Pb–Pb collisions at √sNN = 2.76 TeV with ALICE. The new measurements exploit associated charged hadrons down to 0.5 GeV/c, which significantly extends our previous measurement that only used charged hadrons above 3 GeV/c. After subtracting the contributions of the flow background, v2 to v5, the per-trigger yields are extracted for |ϕ| < 0.7 on the near and for |ϕ − π| < 1.1 on the away side. The ratio of per-trigger yields in Pb–Pb to those in pp collisions, IAA, is measured on the near and away side for the 0–10% most central Pb–Pb collisions. On the away side, the per-trigger yields in Pb–Pb are strongly suppressed to the level of IAA ≈ 0.6 for passoc T > 3 GeV/c, while with decreasing momenta an enhancement develops reaching about 5 at low passoc T . On the near side, an enhancement of IAA between 1.2 at the highest to 1.8 at the lowest passoc T is observed. The data are compared to parton-energy-loss predictions of the JEWEL and AMPT event generators, as well as to a perturbative QCD calculation with medium-modified fragmentation functions. All calculations qualitatively describe the away-side suppression at high passoc T . Only AMPT captures the enhancement at low passoc T , both on the near and away side. However, it also underpredicts IAA above 5 GeV/c, in particular on the near-side. ©
• Imprenta:
  • Publisher place: Woodbury
  • Date published: 2016
• Source:
  • Título do periódico: PHYSICAL REVIEW B
  • ISSN: 0370-2693
  • Volume/Número/Paginação/Ano: v. 763, p. 238–250, dec. 2016

Informações sobre o DOI: 10.1016/j.physletb.2016.10.048 (Fonte: oaDOI API)
• Este periódico é de acesso aberto
• Este artigo é de acesso aberto
• URL de acesso aberto
• Cor do Acesso Aberto: gold
• Licença: cc-by

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• ABNT

  ADAM, J et al. Jet-like correlations with neutral pion triggers in pp and central Pb–Pb collisions at 2.76 TeV. PHYSICAL REVIEW B, v. 763, p. 238–250, 2016Tradução . . Disponível em: http://www.sciencedirect.com/science/article/pii/S0370269316306190. Acesso em: 19 abr. 2024.

• APA

  Adam, J., Prado, C. A. G., Bregant, M., Cosentino, M. R., Figueredo, M. A. S., Jahnke, C., et al. (2016). Jet-like correlations with neutral pion triggers in pp and central Pb–Pb collisions at 2.76 TeV. PHYSICAL REVIEW B, 763, 238–250. doi:10.1016/j.physletb.2016.10.048

• NLM

  Adam J, Prado CAG, Bregant M, Cosentino MR, Figueredo MAS, Jahnke C, Lagana Fernandes C, Munhoz MG, Silva ACO da, Suaide AA do P. Jet-like correlations with neutral pion triggers in pp and central Pb–Pb collisions at 2.76 TeV [Internet]. PHYSICAL REVIEW B. 2016 ; 763 238–250.[citado 2024 abr. 19 ] Available from: http://www.sciencedirect.com/science/article/pii/S0370269316306190

• Vancouver

  Adam J, Prado CAG, Bregant M, Cosentino MR, Figueredo MAS, Jahnke C, Lagana Fernandes C, Munhoz MG, Silva ACO da, Suaide AA do P. Jet-like correlations with neutral pion triggers in pp and central Pb–Pb collisions at 2.76 TeV [Internet]. PHYSICAL REVIEW B. 2016 ; 763 238–250.[citado 2024 abr. 19 ] Available from: http://www.sciencedirect.com/science/article/pii/S0370269316306190

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