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Groomed jets in heavy-ion collisions: sensitivity to medium-induced bremsstrahlung

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arxiv 1610.08930 v1 pith:3TQ23SLJ submitted 2016-10-27 hep-ph nucl-th

Yacine Mehtar-Tani , Konrad Tywoniuk This is my paper · ORCID
classification hep-phnucl-th
keywords energycollisionsmedium-inducedbremsstrahlunggluonhardheavy-ionloss
verification ladder T0 review T1 audit T2 compute T3 formal
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We argue that contemporary jet substructure techniques might facilitate a more direct measurement of hard medium-induced gluon bremsstrahlung in heavy-ion collisions, and focus specifically on the "soft drop declustering" procedure that singles out the two leading jet substructures. Assuming coherent jet energy loss, we find an enhancement of the distribution of the energy fractions shared by the two substructures at small subjet energy caused by hard medium-induced gluon radiation. Departures from this approximation are discussed, in particular, the effects of colour decoherence and the contamination of the grooming procedure by soft background. Finally, we propose a complementary observable, that is the ratio of the two-pronged probability in Pb-Pb to proton-proton collisions and discuss its sensitivity to various energy loss mechanisms.

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Forward citations

Cited by 6 Pith papers

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