Jet Fragmentation and Energy Loss in Ultrarelativistic Heavy Ion Collisions

8th International Workshop on Hadron Physics

Martins, S.^1 ; Mariotto, C. Brenner^2

Instituto de Física, Universidade Federal Do Rio Grande Do sul, Caixa Postal 15051, Porto Alegre, RS

CEP 91501-970, Brazil^1

Instituto de Matemática, Estatística e Fisica, Universidade Federal Do Rio Grande, Campus Carreiros, Av. Itália, km 8, Rio Grande, RS

CEP 96203-900, Brazil^2

关键词: Charged hadrons;    Impact-parameter;    Jet fragmentation;    Nuclear modification factors;    Nuclear shadowing;    Parton distributions;    Quark-gluon plasma;    Ultrarelativistic heavy ion collision;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/706/5/052035/pdf
DOI  :  10.1088/1742-6596/706/5/052035

来源: IOP

【 摘 要 】

In this work we study the suppression of charged hadrons (π±, K±, p and ) in ultrarelativistic heavy ion (UHI) collisions, where the quark-gluon plasma (QGP) is believed to be produced. Jet energy loss in the QGP is the main explanation for jet quenching, which may suppress the number of hadrons produced while the jets traverse the dense and colorful medium created. By taking into account the energy loss of the partons traversing the medium and the nuclear shadowing of the parton distributions depending on the impact-parameter, we calculate the nuclear modification factor RAAfor lead-lead collisions at the LHC. Finally, we estimate the opacity of the QGP in several centrality classes.