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Thèse de Doctorat
DOI
https://doi.org/10.11606/T.43.2013.tde-15102014-131136
Document
Auteur
Nom complet
Gabriel Oliveira Valeriano de Barros
Adresse Mail
Unité de l'USP
Domain de Connaissance
Date de Soutenance
Editeur
São Paulo, 2013
Directeur
Jury
Munhoz, Marcelo Gameiro (Président)
Higa, Renato
Noronha Junior, Jorge Jose Leite
Reis, Alberto Correia dos
Takahashi, Jun
Titre en portugais
Proposta de novos observáveis para jatos reconstruídos em colisões entre íons pesados relativísticos
Mots-clés en portugais
Colisões entre ions pesados relativísticos
Física de partículas
Física nuclear
Quark
Resumé en portugais
O Plasma de Quarks e Glúons (Qgp), um meio denso e quente, pode ser produzido em laboratório a partir da colisão entre íons pesados relativísticos. Pode-se estudá-lo a partir da comparação entre jatos reconstruídos em tais eventos e aqueles reconstruídos em colisões próton-próton, uma vez que se espera que os pártons ao atravessarem o Qgp percam energia em função da interação com o meio, o chamado jet quenching. Este trabalho propõe dois novos observáveis no estudo de jatos reconstruídos em colisões entre íons pesados relativísticos: o espectro de jatos quasi-inclusivo e a evolução do espectro de jatos de recuo em função da partícula trigger. Mostra-se que conhecida a função de resolução do momento reconstruído do jato é possível obter o espectro verdadeiro desses observáveis a partir da técnica de deconvolução bayesiana iterativa. A técnica proposta é empregada em eventos de colisões núcleonúcleo realizadas nos aceleradores Rhic e Lhc cujos dados foram coletados pelas colaborações Star e Alice, respectivamente. Os resultados evidenciam a ocorrência do fenômeno de jet queching independentemente do sistema, da energia e da centralidade da colisão em um grande intervalo cinemático.
Titre en anglais
Proposal of new observables for the study of reconstructed jets in heavy ion collisions
Mots-clés en anglais
Heavy ion collisions
Nuclear Physics
Parcicle physics
Quark
Resumé en anglais
The Quark-Gluon Plasma (Qgp), a hot and dense medium, can be produced in laboratory by colliding relativistic heavy ion. This medium can be studied by the comparison of jets reconstructed in such events and those reconstructed in proton-proton collisions, once it is expected that partons lose energy when traversing the Qgp due to its interaction with the medium, the so-called jet quenching. This work proposes two new observables: the quasiinclusive jet spectrum and the evolution of the recoil jet spectrum as function of the trigger particle. It is shown that it is possible to obtain those spectra using iterative bayesian unfolding, which requires the resolution function for the reconstructed jet transverse momentum. This technique is applied to Star and Alice data which has been taken at Rhic and Lhc, respectively. The results indicate that jet quenching occurs in a very wide kinematic range, regardless the colliding system, its energy and centrality.
 
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Date de Publication
2014-10-16
 
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  • Aamodt, K., et al. Particle-Yield Modification in Jetlike Azimuthal Dihadron Correlations in Pb-Pb Collisions at sqrt[s_{NN}]=2.76 TeV [doi:10.1103/PhysRevLett.108.092301]. Physical Review Letters [online], 2012, vol. 108, p. 092301.
  • Abelev, B., et al. Anisotropic flow of charged hadrons, pions and (anti-)protons measured at high transverse momentum in Pb-Pb collisions at [doi:10.1016/j.physletb.2012.12.066]. Physics Letters. B [online], 2013, vol. 719, p. 18-28.
  • Abelev, B., et al. Centrality dependence of charged particle production at large transverse momentum in Pb-Pb collisions at [doi:10.1016/j.physletb.2013.01.051]. Physics Letters. B [online], 2013, vol. 720, p. 52-62.
  • Abelev, B., et al. Charge separation relative to the reaction plane in Pb-Pb collisions at sqrt[s_{NN}]=2.76 TeV [doi:10.1103/physrevlett.110.012301]. Physical Review Letters [online], 2013, vol. 110, p. 2301.
  • Abelev, B., et al. Charged kaon femtoscopic correlations in pp collisions at sqrt[s]=7--TeV [doi:10.1103/physrevd.87.052016]. Physical Review. D, Particles, Fields, Gravitation, and Cosmology [online], 2013, vol. 87, p. 052016.
  • Abelev, B., et al. Coherent photoproduction in ultra-peripheral Pb-Pb collisions at [doi:10.1016/j.physletb.2012.11.059]. Physics Letters. B [online], 2013, vol. 718, p. 1273-1283.
  • Abelev, B., et al. J/ψ Polarization in pp Collisions at sqrt[s]=7 TeV [doi:10.1103/PhysRevLett.108.082001]. Physical Review Letters [online], 2012, vol. 108, p. 082001.
  • Abelev, B., et al. J/ψ Suppression at Forward Rapidity in Pb-Pb Collisions at sqrt[s_{NN}]=2.76 TeV [doi:10.1103/physrevlett.109.072301]. Physical Review Letters [online], 2012, vol. 109, p. 072301.
  • Abelev, B., et al. Light vector meson production in pp collisions at [doi:10.1016/j.physletb.2012.03.038]. Physics Letters. B [online], 2012, vol. 710, p. 557-568.
  • Abelev, B., et al. Measurement of charm production at central rapidity in proton-proton collisions at $ sqrt {s} = 7{ }TeV $ [doi:10.1007/JHEP01(2012)128]. The Journal of High Energy Physics [online], 2012, vol. 2012, p. 128.
  • Abelev, B., et al. Measurement of electrons from beauty hadron decays in pp collisions at [doi:10.1016/j.physletb.2013.01.069]. Physics Letters. B [online], 2013, vol. 721, p. 13-23.
  • Abelev, B., et al. Measurement of electrons from semileptonic heavy-flavor hadron decays in pp collisions at sqrt[s]=7 TeV [doi:10.1103/PhysRevD.86.112007]. Physical Review. D. Particles, Fields, Gravitation, and Cosmology [online], 2012, vol. 86, p. 112007.
  • Abelev, B., et al. Measurement of event background fluctuations for charged particle jet reconstruction in Pb-Pb collisions at $ sqrt {{{s_{ ext{NN}}}}} = {2}{.76},{ ext{TeV}} $ [doi:10.1007/JHEP03(2012)053]. The Journal of High Energy Physics [online], 2012, vol. 2012, p. 53.
  • Abelev, B., et al. Measurement of inelastic, single- and double-diffraction cross sections in proton-proton collisions at the LHC with ALICE [doi:10.1140/epjc/s10052-013-2456-0]. European Physical Journal. C, Particles and Fields [online], 2013, vol. 73, p. 2456.
  • Abelev, B., et al. Measurement of the Cross Section for Electromagnetic Dissociation with Neutron Emission in Pb-Pb Collisions at sqrt[s_{NN}]=2.76 TeV [doi:10.1103/PhysRevLett.109.252302]. Physical Review Letters [online], 2012, vol. 109, p. 252302.
  • Abelev, B., et al. Multi-strange baryon production in pp collisions at with ALICE [doi:10.1016/j.physletb.2012.05.011]. Physics Letters. B [online], 2012, vol. 712, p. 309-318.
  • Abelev, B., et al. Net-Charge Fluctuations in Pb-Pb Collisions at sqrt[s_{NN}]=2.76--TeV [doi:10.1103/physrevlett.110.152301]. Physical Review Letters [online], 2013, vol. 110, p. 152301.
  • Abelev, B., et al. Neutral pion and η meson production in proton proton collisions at and [doi:10.1016/j.physletb.2012.09.015]. Physics Letters. B [online], 2012, vol. 717, p. 162-172.
  • Abelev, B., et al. Pion, Kaon, and Proton Production in Central Pb-Pb Collisions at sqrt[s_{NN}]=2.76 TeV [doi:10.1103/physrevlett.109.252301]. Physical Review Letters [online], 2012, vol. 109, p. 252301.
  • Abelev, B., et al. Production of K∗(892)0 and (1020) in pp collisions at $sqrt{s}=7 mathrm{TeV}$ [doi:10.1140/epjc/s10052-012-2183-y]. European Physical Journal C. Particles and Fields [online], 2012, vol. 72, p. 2183.
  • Abelev, B., et al. Production of Muons from Heavy Flavor Decays at Forward Rapidity in pp and Pb-Pb Collisions at sqrt[s_{NN}]=2.76 TeV [doi:10.1103/physrevlett.109.112301]. Physical Review Letters [online], 2012, vol. 109, p. 112301.
  • Abelev, B., et al. Pseudorapidity Density of Charged Particles in p+Pb Collisions at sqrt[s_{NN}]=5.02--TeV [doi:10.1103/physrevlett.110.032301]. Physical Review Letters [online], 2013, vol. 110, p. 032301.
  • Abelev, B., et al. Suppression of high transverse momentum D mesons in central Pb-Pb collisions at $ sqrt{{{s_{mathrm{NN}}}}}=2.76;mathrm{TeV} $ [doi:10.1007/jhep09(2012)112]. The Journal of High Energy Physics [online], 2012, vol. 2012, p. 112.
  • Abelev, B., et al. Transverse Momentum Distribution and Nuclear Modification Factor of Charged Particles in p+Pb Collisions at sqrt[s_{NN}]=5.02--TeV [doi:10.1103/physrevlett.110.082302]. Physical Review Letters [online], 2013, vol. 110, p. 082302.
  • Abelev, B., et al. Transverse sphericity of primary charged particles in minimum bias proton proton collisions at $mathbf{sqrt{s}=0.9},~mathbf{2.76}~mbox{and}~mathbf{7}~mbox{TeV}$ [doi:10.1140/epjc/s10052-012-2124-9]. European Physical Journal C. Particles and Fields [online], 2012, vol. 72, p. 2124.
  • Figueiredo, M A S, et al. Estudo da viabilidade da medida da reação 12C(n,gamma)13C por meio do método de dissociação Coulombiana. In XXX Reunião de Trabalho sobre Física Nuclear no Brasil, Águas de Lindóia, 2007. Programa e Resumos., 2007. Resumo.
  • NEGRAO, R., et al. Study of 9Be Break-up Reactions at Energies Near the Coulomb Barrier. In 9th International Conference on Nucleus-Nucleus Collisions, Rio de Janeiro. Abstract Book., 2006. Abstract.
  • NEGRAO, R., et al. Study of the 9Be+12C reaction at energies near the Coulomb Barrier. In XXX Reunião de Trabalho sobre Física Nuclear no Brasil, Águas de Lindóia, 2007. Programa e Resumos., 2007. Abstract.
  • oliveira r n a, et al. Study of 9Be break-up reactions at energies near Coulomb barrier. In XXXI Reunião de Trabalho sobre Física Nuclear no Brasil, São Sebastião, 2008. Programa e Resumos., 2008. Abstract.
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