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arXiv · 1706.06047

Radiative energy loss of neighboring subjets

Yacine Mehtar-Tani·Konrad Tywoniuk
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Abstract

We compute the in-medium energy loss probability distribution of two neighboring subjets at leading order, in the large-$N_c$ approximation. Our result exhibits a gradual onset of color decoherence of the system and accounts for two expected limiting cases. When the angular separation is smaller than the characteristic angle for medium-induced radiation, the two-pronged substructure lose energy coherently as a single color charge, namely that of the parent parton. At large angular separation the two subjets lose energy independently. Our result is a first step towards quantifying effects of energy loss as a result of the fluctuation of the multi-parton jet substructure and therefore goes beyond the standard approach to jet quenching based on single parton energy loss. We briefly discuss applications to jet observables in heavy-ion collisions.

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Yacine Mehtar-Tani, Konrad Tywoniuk. 2018-08-10. Radiative energy loss of neighboring subjets. https://doi.org/10.1016/j.nuclphysa.2018.09.041

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