Parton Energy Loss Without Transverse Momentum Broadening
Korinna Zapp, Gunnar Ingelman, Johan Rathsman, Johanna Stachel, Urs, Achim Wiedemann
TL;DR
This paper uses the JEWEL 1.0 Monte Carlo to study jet evolution in a medium, finding little to no transverse momentum broadening due to the microscopic conservation of energy and momentum during splittings and scatterings.
Contribution
It introduces a microscopic model that explains the absence of significant transverse momentum broadening in jet-medium interactions.
Findings
No sizeable transverse momentum broadening observed.
Small increase or decrease in mean transverse momentum depending on hadronisation assumptions.
Conservation of energy and momentum at each splitting and scattering explains results.
Abstract
The JEWEL 1.0 Monte Carlo simulates jet evolution in a medium with a microscopic description of splitting and scattering processes. In the framework of this model we investigate the transverse momentum broadening due to medium effects in different scenarios. Depending on assumptions about hadronisation, we observe either a small increase or even a slight decrease of the mean transverse momentum, but no sizeable broadening. This appears to be a natural consequence of a model formulation which conserves energy and momentum microscopically at each splitting and at each scattering.
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