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High Energy Physics - Phenomenology

arXiv:1610.08930 (hep-ph)
[Submitted on 27 Oct 2016]

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

Authors:Yacine Mehtar-Tani, Konrad Tywoniuk
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Abstract: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.
Comments: 20 pages, 5 figures
Subjects: High Energy Physics - Phenomenology (hep-ph); Nuclear Theory (nucl-th)
Report number: INT-PUB-16-038, CERN-TH-2016-227
Cite as: arXiv:1610.08930 [hep-ph]
  (or arXiv:1610.08930v1 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1610.08930
Related DOI: https://doi.org/10.1007/JHEP04%282017%29125

Submission history

From: Konrad Tywoniuk [view email]
[v1] Thu, 27 Oct 2016 19:01:18 UTC (231 KB)
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