Abstract
In this article, a model based on Glauber Monte Carlo is built to simulate the procedure of jet quenching in Quark-Gluon Plasma (QGP). In this model, energy loss of jets in QGP is parametrized by two quantities: path length of jets in QGP, L, and the initial transverse momentum of the jet PT. The path length of each branch of the jet are labeled L1 and L2. As input data, original jet energy data of p + p collisions were obtained from CMS measurement. After being processed by our model, simulated Pb + Pb jet energy data could be given and were compared to the data of ATLAS’s measurement in Ref. [1]. Distributions of (1/N)dN/dxJ where xJ=PT2/PT1, also noted as “frequency”, are presented as a function of PT1 and collision centrality. As the final result, two different forms of energy loss formula were found, both of which have good adaptation to certain centrality and PT ranges.
Highlights
Relativistic heavy-ion collisions can produce a medium made up of free quarks and gluons, known as the Quark-Gluon Plasma (QGP)
Due to the reason that jets carry color charges, they strongly couple with the QGP, lose energy as they propagate through the medium, resulting in the phenomenon of “jet quenching”, which is widely concerned and studied by various scholars [2,3,4]
In the ATLAS measurement Ref. [1], the variable centrality is used to represent the degree of overlapping between two nucleons
Summary
Relativistic heavy-ion collisions can produce a medium made up of free quarks and gluons, known as the Quark-Gluon Plasma (QGP). A number of research groups have already published their measurement results related to energy of jets produced in these heavy-ion collisions at various collision energy levels. As the final result of this model, the energy loss formula reveals the specific way that energies of jets are modified by QGP. The completion of this model has filled the blank of theoretical prediction of jet energy distributions in this specific energy level of collision.
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