Measurements of the suppression and correlations of dijets in Xe+Xe collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msqrt><mml:msub><mml:mi>s</mml:mi><mml:mrow><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>5.44</mml:mn></mml:mrow></mml:math> TeV

Measurements of the suppression and correlations of dijets is performed using $3\phantom{\rule{4pt}{0ex}}\textmu{}{\mathrm{b}}^{\ensuremath{-}1}$ of Xe+Xe data at $\sqrt{{s}_{NN}}=5.44$ TeV collected with the ATLAS detector at the CERN Large Hadron Collider. Dijets with jets reconstructed using the $R=0.4$ anti-${k}_{t}$ algorithm are measured differentially in jet ${p}_{\text{T}}$ over the range of 32 to 398 GeV and the centrality of the collisions. Significant dijet momentum imbalance is found in the most central Xe+Xe collisions, which decreases in more peripheral collisions. Results from the measurement of per-pair normalized and absolutely normalized dijet ${p}_{\text{T}}$ balance are compared with previous $\mathrm{Pb}+\mathrm{Pb}$ measurements at $\sqrt{{s}_{NN}}=5.02$ TeV. The differences between the dijet suppression in Xe+Xe and $\mathrm{Pb}+\mathrm{Pb}$ are further quantified by the ratio of pair nuclear-modification factors. The results are found to be consistent with those measured in $\mathrm{Pb}+\mathrm{Pb}$ data when compared in classes of the same event activity and when taking into account the difference between the center-of-mass energies of the initial parton scattering process in Xe+Xe and $\mathrm{Pb}+\mathrm{Pb}$ collisions. These results should provide input for a better understanding of the role of energy density, system size, path length, and fluctuations in the parton energy loss.

Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.