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Dynamical Grooming meets LHC data

Caucal, Paul ; Soto-Ontoso, Alba and Takacs, Adam LU (2021) In Journal of High Energy Physics 2021(7).
Abstract

In this work, we analyse the all-orders resummation structure of the momentum sharing fraction, zg, opening angle, θg, and relative transverse momentum, kt,g, of the splitting tagged by the Dynamical Grooming procedure in hadronic collisions. We demonstrate that their resummation does non-exponentiate and it is free of clustering logarithms. Then, we analytically compute the probability distributions of (zg, θg, kt,g) up to next-to-next-to-double logarithm accuracy (N2DL) in the narrow jet limit, including a matching to leading order in αs. On the phenomenological side, we perform an analytic-to-parton level comparison with Pythia and Herwig. We find... (More)

In this work, we analyse the all-orders resummation structure of the momentum sharing fraction, zg, opening angle, θg, and relative transverse momentum, kt,g, of the splitting tagged by the Dynamical Grooming procedure in hadronic collisions. We demonstrate that their resummation does non-exponentiate and it is free of clustering logarithms. Then, we analytically compute the probability distributions of (zg, θg, kt,g) up to next-to-next-to-double logarithm accuracy (N2DL) in the narrow jet limit, including a matching to leading order in αs. On the phenomenological side, we perform an analytic-to-parton level comparison with Pythia and Herwig. We find that differences between the analytic and the Monte-Carlo results are dominated by the infra-red regulator of the parton shower. Further, we present the first analytic comparison to preliminary ALICE data and highlight the role of non-perturbative corrections in such low-pt regime. Once the analytic result is corrected by a phenomenologically determined non-perturbative factor, we find very good agreement with the data.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Perturbative QCD, Resummation
in
Journal of High Energy Physics
volume
2021
issue
7
article number
20
publisher
Springer
external identifiers
  • scopus:85109656960
ISSN
1029-8479
DOI
10.1007/JHEP07(2021)020
language
English
LU publication?
yes
id
de37dc33-0b58-407a-a5fa-278e8ad8547c
date added to LUP
2021-08-23 11:22:57
date last changed
2024-04-20 09:54:48
@article{de37dc33-0b58-407a-a5fa-278e8ad8547c,
  abstract     = {{<p>In this work, we analyse the all-orders resummation structure of the momentum sharing fraction, z<sub>g</sub>, opening angle, θ<sub>g</sub>, and relative transverse momentum, k<sub>t,g</sub>, of the splitting tagged by the Dynamical Grooming procedure in hadronic collisions. We demonstrate that their resummation does non-exponentiate and it is free of clustering logarithms. Then, we analytically compute the probability distributions of (z<sub>g</sub>, θ<sub>g</sub>, k<sub>t,g</sub>) up to next-to-next-to-double logarithm accuracy (N<sup>2</sup>DL) in the narrow jet limit, including a matching to leading order in α<sub>s</sub>. On the phenomenological side, we perform an analytic-to-parton level comparison with Pythia and Herwig. We find that differences between the analytic and the Monte-Carlo results are dominated by the infra-red regulator of the parton shower. Further, we present the first analytic comparison to preliminary ALICE data and highlight the role of non-perturbative corrections in such low-p<sub>t</sub> regime. Once the analytic result is corrected by a phenomenologically determined non-perturbative factor, we find very good agreement with the data.</p>}},
  author       = {{Caucal, Paul and Soto-Ontoso, Alba and Takacs, Adam}},
  issn         = {{1029-8479}},
  keywords     = {{Perturbative QCD; Resummation}},
  language     = {{eng}},
  month        = {{07}},
  number       = {{7}},
  publisher    = {{Springer}},
  series       = {{Journal of High Energy Physics}},
  title        = {{Dynamical Grooming meets LHC data}},
  url          = {{http://dx.doi.org/10.1007/JHEP07(2021)020}},
  doi          = {{10.1007/JHEP07(2021)020}},
  volume       = {{2021}},
  year         = {{2021}},
}