| Texto completo | |
| Autor(es): |
Bernardes, Cesar
Número total de Autores: 1
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| Tipo de documento: | Artigo Científico |
| Fonte: | CNR '09: SECOND INTERNATIONAL WORKSHOP ON COMPOUND NUCLEAR REACTIONS AND RELATED TOPICS; v. 296, p. 4-pg., 2024-01-01. |
| Resumo | |
A hot and dense matter exhibiting collective flow behavior with almost no viscous dissipation has been discovered in ultrarelativistic nuclear collisions. To constrain the fundamental degrees of freedom and equation of state of this matter, these proceedings present an extraction of its speed of sound using head-on lead-lead collision data collected by the CMS experiment at a centerof-mass energy per nucleon pair of 5.02 TeV. The measurement is based on an analysis of the observed charged multiplicity dependence of the average particle transverse momentum in ultra-central events (impact parameter of nearly zero). This variable probes the system temperature as a function of entropy density at a fixed volume. Results are compared with hydrodynamic simulations and lattice quantum chromodynamics (QCD) predictions of the equation of state at high temperatures and small chemical potential. Implications to search for QCD phase transition and the critical point are discussed. (AU) | |
| Processo FAPESP: | 18/01398-1 - Busca por nova física no experimento CMS do Large Hadron Collider |
| Beneficiário: | Breno Orzari |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |