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How many interactions does it take to modify a jet

Le Roux, Chiara LU ; Milhano, Guilherme and Zapp, Korinna LU (2025) 2412.14983.
Abstract
It is a continued open question how there can be an azimuthal anisotropy of high particles quantified by a sizable in p+Pb collisions when, at the same time, the nuclear modification factor is consistent with unity. We address this puzzle within the framework of the jet quenching model \textsc{Jewel}. In the absence of reliable medium models for small collision systems we use the number of scatterings per parton times the squared Debye mass to characterise the strength of medium modifications. Working with a simple brick medium model we show that, for small systems and not too strong modifications, and approximately scale with this quantity. We find that a comparatively large number of scatterings is needed to generate measurable jet... (More)
It is a continued open question how there can be an azimuthal anisotropy of high particles quantified by a sizable in p+Pb collisions when, at the same time, the nuclear modification factor is consistent with unity. We address this puzzle within the framework of the jet quenching model \textsc{Jewel}. In the absence of reliable medium models for small collision systems we use the number of scatterings per parton times the squared Debye mass to characterise the strength of medium modifications. Working with a simple brick medium model we show that, for small systems and not too strong modifications, and approximately scale with this quantity. We find that a comparatively large number of scatterings is needed to generate measurable jet quenching. Our results indicate that the corresponding to the observed could fall within the experimental uncertainty. Thus, while there is currently no contradiction with the measurements, our results indicate that and go hand-in-hand. We also discuss departures from scaling, in particular, due to sizable inelastic energy loss. (Less)
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author
; and
organization
publishing date
type
Working paper/Preprint
publication status
published
subject
volume
2412.14983
publisher
arXiv.org
DOI
10.48550/arXiv.2412.14983
language
English
LU publication?
yes
id
a86bd5bb-360e-4252-a174-e1b1f15e7692
date added to LUP
2025-11-05 14:57:41
date last changed
2025-11-11 11:24:45
@misc{a86bd5bb-360e-4252-a174-e1b1f15e7692,
  abstract     = {{It is a continued open question how there can be an azimuthal anisotropy of high  particles quantified by a sizable  in p+Pb collisions when, at the same time, the nuclear modification factor  is consistent with unity. We address this puzzle within the framework of the jet quenching model \textsc{Jewel}. In the absence of reliable medium models for small collision systems we use the number of scatterings per parton times the squared Debye mass to characterise the strength of medium modifications. Working with a simple brick medium model we show that, for small systems and not too strong modifications,  and  approximately scale with this quantity. We find that a comparatively large number of scatterings is needed to generate measurable jet quenching. Our results indicate that the  corresponding to the observed  could fall within the experimental uncertainty. Thus, while there is currently no contradiction with the measurements, our results indicate that  and  go hand-in-hand. We also discuss departures from scaling, in particular, due to sizable inelastic energy loss.}},
  author       = {{Le Roux, Chiara and Milhano, Guilherme and Zapp, Korinna}},
  language     = {{eng}},
  note         = {{Preprint}},
  publisher    = {{arXiv.org}},
  title        = {{How many interactions does it take to modify a jet}},
  url          = {{http://dx.doi.org/10.48550/arXiv.2412.14983}},
  doi          = {{10.48550/arXiv.2412.14983}},
  volume       = {{2412.14983}},
  year         = {{2025}},
}