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pQCD approach may solve a substantial part of the heavy quark quenching puzzle. 

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However, as emphasized in [374], any proposed solution of this puzzle must also be checked for consistency with the extensive pion quenching data [368– 370], for which preliminary data now extend out to p$_{T}$ ∼ 20 GeV. That this is a challenge is clearly seen in Fig. 4.5, where for fixed L = 5 fm, the addition of elastic loss would significantly overpredict the quenching of pions. However, the simultaneous inclusion of path fluctuations leads to a decrease of the mean g and u, d path lengths that partially offsets the increased energy loss. There- fore, the combined three effects considered here makes it possible to satisfy 

