Publicação
Measurement of the Centrality Dependence of the Dijet Yield in p plus Pb Collisions at √sNN=8.16 TeV with the ATLAS Detector
| Resumo: | ATLAS measured the centrality dependence of the dijet yield using \( 165 \, \text{nb}^{-1} \) of \( p + \text{Pb} \) data collected at \( \sqrt{s_{\text{NN}}} = 8.16 \, \text{TeV} \) in 2016. The event centrality, which reflects the \( p + \text{Pb} \) impact parameter, is characterized by the total transverse energy registered in the Pb-going side of the forward calorimeter. The central-to-peripheral ratio of the scaled dijet yields, \( R_{\text{CP}} \), is evaluated, and the results are presented as a function of variables that reflect the kinematics of the initial hard parton scattering process. The \( R_{\text{CP}} \) shows a scaling with the Bjorken \( x \) of the parton originating from the proton, \( x_p \), while no such trend is observed as a function of \( x_{\text{Pb}} \). This analysis provides unique input to understanding the role of small proton spatial configurations in \( p + \text{Pb} \) collisions by covering parton momentum fractions from the valence region down to \( x_p \sim 10^{-3} \) and \( x_{\text{Pb}} \sim 4 \times 10^{-4} \). |
|---|---|
| Autores principais: | Castro, Nuno Filipe |
| Outros Autores: | Onofre, A.; ATLAS Collaboration |
| Assunto: | Ciências Naturais::Ciências Físicas |
| Ano: | 2024 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | ATLAS measured the centrality dependence of the dijet yield using \( 165 \, \text{nb}^{-1} \) of \( p + \text{Pb} \) data collected at \( \sqrt{s_{\text{NN}}} = 8.16 \, \text{TeV} \) in 2016. The event centrality, which reflects the \( p + \text{Pb} \) impact parameter, is characterized by the total transverse energy registered in the Pb-going side of the forward calorimeter. The central-to-peripheral ratio of the scaled dijet yields, \( R_{\text{CP}} \), is evaluated, and the results are presented as a function of variables that reflect the kinematics of the initial hard parton scattering process. The \( R_{\text{CP}} \) shows a scaling with the Bjorken \( x \) of the parton originating from the proton, \( x_p \), while no such trend is observed as a function of \( x_{\text{Pb}} \). This analysis provides unique input to understanding the role of small proton spatial configurations in \( p + \text{Pb} \) collisions by covering parton momentum fractions from the valence region down to \( x_p \sim 10^{-3} \) and \( x_{\text{Pb}} \sim 4 \times 10^{-4} \). |
|---|