: ATLAS measured the centrality dependence of the dijet yield using 165 nb^{-1} of p+Pb data collected at sqrt[s_{NN}]=8.16 TeV in 2016. The event centrality, which reflects the p+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_{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_{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_{Pb}. This analysis provides unique input to understanding the role of small proton spatial configurations in p+Pb collisions by covering parton momentum fractions from the valence region down to x_{p}∼10^{-3} and x_{Pb}∼4×10^{-4}.
Measurement of the Centrality Dependence of the Dijet Yield in p+Pb Collisions at √sNN=8.16 TeV with the ATLAS Detector / Add, G., Aloisio, A., Alviggi, M., Canale, V., Cirotto, F., Della Pietra, M., Merola, L., Massarotti, P., Rossi, E., Conventi, F., Izzo, V., Sekhniaidze, G., Iengo, P., Di Donato, C., De Asmundis, R., Carlino, G., Auricchio, S., Camerlingo, M.T., D'Onofrio, A., Doria, A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 132:10(2024). [10.1103/physrevlett.132.102301]
Measurement of the Centrality Dependence of the Dijet Yield in p+Pb Collisions at √sNN=8.16 TeV with the ATLAS Detector
A. Aloisio;M. Alviggi;V. Canale;F. Cirotto;M. Della Pietra;L. Merola;P. Massarotti;E. Rossi;S. Auricchio;
2024
Abstract
: ATLAS measured the centrality dependence of the dijet yield using 165 nb^{-1} of p+Pb data collected at sqrt[s_{NN}]=8.16 TeV in 2016. The event centrality, which reflects the p+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_{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_{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_{Pb}. This analysis provides unique input to understanding the role of small proton spatial configurations in p+Pb collisions by covering parton momentum fractions from the valence region down to x_{p}∼10^{-3} and x_{Pb}∼4×10^{-4}.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
