Medium-Induced Modification of Z-Tagged Charged Particle Yields in Pb + Pb Collisions at 5.02 TeV with the ATLAS Detector Aad, G. Aguilar Saavedra, Juan Antonio Atlas Collaboration The yield of charged particles opposite to a Z boson with large transverse momentum (p(T)) is measured in 260 pb(-1) of pp and 1.7 nb(-1) of Pb + Pb collision data at 5.02 TeV per nucleon pair recorded with the ATLAS detector at the Large Hadron Collider. The Z boson tag is used to select hard-scattered partons with specific kinematics, and to observe how their showers are modified as they propagate through the quarkgluon plasma created in Pb + Pb collisions. Compared with pp collisions, charged-particle yields in Pb + Pb collisions show significant modifications as a function of charged-particle p(T) in a way that depends on event centrality and Z boson p(T). The data are compared with a variety of theoretical calculations and provide new information about the medium-induced energy loss of partons in a p(T) regime difficult to measure through other channels. 2021-03-17T10:25:50Z 2021-03-17T10:25:50Z 2021-02-19 info:eu-repo/semantics/article Aad, G., Abbott, B., Abbott, D. C., Abud, A. A., Abeling, K., Abhayasinghe, D. K., ... & Baldin, E. M. (2021). Medium-induced modification of Z-tagged charged particle yields in Pb+ Pb collisions at 5.02 TeV with the ATLAS detector. Physical review letters, 126(7), 072301. [DOI: 10.1103/PhysRevLett.126.072301] http://hdl.handle.net/10481/67282 10.1103/PhysRevLett.126.072301 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España Amer Physical Soc