CARQUIN, EDSON

2024-03-08, Filmer, E. K., Grant, C. M., Jackson, P., Kong, A. X.Y., Pandya, H. D., Potti, H., Ruggeri, T. A., Ting, E. X.L., White, M. J., Gingrich, D. M., Lindon, J. H., Nishu, N., Pinfold, J. L., Cakir, O., Yildiz, H. Duran, Kuday, S., Turk Cakir, I., Sultansoy, S., Adam Bourdarios, C., Arnaez, O., Berger, N., Castillo, F. L., Costanza, F., Delmastro, M., Di Ciaccio, L., Hryn’ova, T., Jézéquel, S., Koletsou, I., Levêque, J., Lewis, D. J., Little, J. D., Lorenzo Martinez, N., Poddar, G., Sanchez Pineda, A., Sauvan, E., Bernardi, G., Bomben, M., Li, A., Li, T., Marchiori, G., Nakkalil, K., Shen, Q., Zhang, Y., Chekanov, S., Darmora, S., Hopkins, W. H., Hoya, J., Love, J., Luongo, N. A., Metcalfe, J., Mete, A. S., Paramonov, A., Proudfoot, J., Van Gemmeren, P., Wamorkar, T., Wang, R., Zhang, J., Cheu, E., Cui, Z., Ghosh, A., Johns, K. A., Lampl, W., Lindley, R. E., Loch, P., Rutherfoord, J. P., Sardain, J., Varnes, E. W., Zhou, H., Zhou, Y., Bakshi Gupta, D., Burghgrave, B., Cardenas, J. C.J., De, K., Farbin, A., Hadavand, H. K., Myers, A. J., Ozturk, N., Usai, G., White, A., Angelidakis, S., Fassouliotis, D., Fountas, L., Gkialas, I., Kourkoumelis, C., Alexopoulos, T., Drivas-Koulouris, I., Gazis, E. N., Kitsaki, C., Maltezos, S., Paraskevopoulos, C., Perganti, M., Cristian Andres Allendes Flores, BROOKS, WILLIAM K., CARQUIN, EDSON, Fernandez Luengo, S.I., Fuenzalida Garrido, S., PEZOA, RAQUEL, Robles Gajardo, C.M., TAPIA, SEBASTIAN, Viaux Maira, N.

ATLAS measured the centrality dependence of the dijet yield using 165  nb−1 of 𝑝+Pb data collected at √𝑠NN=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, 𝑅CP, is evaluated, and the results are presented as a function of variables that reflect the kinematics of the initial hard parton scattering process. The 𝑅CP shows a scaling with the Bjorken 𝑥 of the parton originating from the proton, 𝑥𝑝, while no such trend is observed as a function of 𝑥Pb. 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 𝑥𝑝∼10−3 and 𝑥Pb∼4×10−4.