Short path length pQCD corrections to energy loss in the quark gluon plasma

15th International Conference on Strangeness in Quark Matter

Kolbe, Isobel^1 ; Horowitz, W.A.^1

Department of Physics, University of Cape Town, Rondebosch

7701, South Africa^1

关键词: Collective behaviour;    Correction terms;    Energy loss analysis;    Interacting particles;    Loss formulae;    Quark-gluon plasma;    Separation distances;    Small systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/668/1/012107/pdf
DOI  :  10.1088/1742-6596/668/1/012107

来源: IOP

【 摘 要 】

The twin identifications of high-pTenhancement and low-pTcollective behaviour in the shockingly small systems of interacting particles created in pA collisions calls for a detailed theoretical energy loss analysis. We study the way in which energy is dissipated in the QGP created in pA collisions by calculating the short path length corrections to the DGLV energy loss formulae that have produced excellent predictions for AA collisions. We find that, shockingly, because of the large formation time assumption (used in the DGLV calculation), a highly non-trivial cancellation of correction terms results in a null short path length correction to the DGLV energy loss formula. We investigate the effect of relaxing the large formation time assumption in the final stages of the calculation and find, because of the separation distance between production and scattering centre is integrated over from 0 to ∞, 100% corrections, even in the large path length approximation employed by DGLV.