A generalised-k_t jet algorithm for Deep Inelastic Scattering
Pith reviewed 2026-06-27 06:43 UTC · model grok-4.3
The pith
An inclusive generalised-k_t jet algorithm for Deep Inelastic Scattering is defined in the Breit frame to identify the struck quark jet.
A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.
Core claim
The authors introduce an inclusive generalised-k_t jet algorithm defined in the Breit frame, governed by the usual parameter p and a jet radius R, and implemented in fjcontrib. The angular-ordered p=0 version can formulate observables with simple all-order structures. The work investigates phenomenological applications to struck-quark jet identification and evaluates sensitivity to non-perturbative effects such as hadronisation, with explicit comparisons to the Centauro algorithm.
What carries the argument
The generalised-k_t clustering algorithm with parameter p, defined in the Breit frame for DIS events.
If this is right
- The p=0 member permits observables whose all-order structure remains simple.
- The algorithms can be applied directly to tag the jet associated with the struck quark.
- Their response to hadronisation can be quantified and compared with existing methods.
- Direct comparisons with the Centauro algorithm become possible within the same framework.
Where Pith is reading between the lines
- The Breit-frame definition may reduce frame-choice ambiguities that affect jet reconstruction in other DIS analyses.
- Varying p continuously could allow optimisation of jet tagging efficiency versus background rejection in precision DIS measurements.
- Availability in fjcontrib makes the family immediately usable inside standard parton-shower generators for further validation studies.
Load-bearing premise
Defining the algorithm in the Breit frame and extending the p=0 case to general p yields useful phenomenological improvements for struck-quark jet identification.
What would settle it
A side-by-side comparison on the same DIS Monte Carlo samples in which the new algorithms show no gain in struck-quark jet purity or no reduction in hadronisation uncertainty relative to the Centauro algorithm.
Figures
read the original abstract
We introduce an inclusive generalised-$k_t$ jet algorithm for Deep Inelastic Scattering, defined in the Breit frame and implemented in fjcontrib. The family of algorithms is governed by the usual parameter $p$, which controls the transverse-momentum dependence of the algorithm, as well as by a jet radius parameter $R$. The angular-ordered ($p=0$) version of the algorithm was already presented by some of us, and can be used to formulate observables with simple all-order structures. In this article we investigate phenomenological applications of the algorithms related to the identification of the jet associated with the struck quark, and assess their sensitivity to non-perturbative effects, such as hadronisation. We also perform comparisons with the recent Centauro algorithm.
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. The paper introduces an inclusive generalised-k_t jet algorithm for Deep Inelastic Scattering defined in the Breit frame, governed by the usual parameter p (controlling transverse-momentum dependence) and jet radius R, and implemented in fjcontrib. It extends prior work on the angular-ordered (p=0) case, which admits simple all-order structures, and performs a phenomenological investigation of struck-quark jet identification, sensitivity to non-perturbative effects such as hadronisation, and comparisons with the Centauro algorithm.
Significance. The public implementation in fjcontrib is a clear strength that enables reproducible use by the community. If the phenomenological studies demonstrate concrete advantages in struck-quark tagging or reduced non-perturbative sensitivity relative to existing algorithms, the work would supply a practical tool for precision jet analyses in DIS at facilities such as the EIC.
minor comments (3)
- [Abstract] The abstract states that the algorithms are investigated for struck-quark jet identification and non-perturbative sensitivity, but the manuscript should explicitly state the quantitative figures of merit (e.g., tagging efficiency, purity, or hadronisation corrections) used to reach conclusions.
- Ensure that all plots comparing the new algorithm family to Centauro include error bands or statistical uncertainties so that differences can be assessed for significance.
- Notation for the distance measure in the generalised-k_t clustering should be written out explicitly once in the main text (even if standard) to aid readers unfamiliar with the p-parameter family.
Simulated Author's Rebuttal
We thank the referee for their report, positive assessment of the work, and recommendation for minor revision. No major comments were raised.
Circularity Check
No circularity: algorithmic definition, not a derived prediction
full rationale
The paper's core contribution is the explicit definition of a generalised-k_t family (parameter p and radius R) in the Breit frame for inclusive DIS jet finding, together with its implementation. This is a constructive act rather than a derivation whose outputs reduce to its inputs by construction. The p=0 case is cited as prior work by overlapping authors, but the extension to general p and the phenomenological study are presented as new; neither relies on a fitted parameter renamed as a prediction nor on a self-citation chain that forbids alternatives. No equations or claims in the provided text exhibit self-definitional, fitted-input, or uniqueness-imported circularity.
Axiom & Free-Parameter Ledger
Forward citations
Cited by 1 Pith paper
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