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arxiv: 2604.09822 · v1 · submitted 2026-04-10 · ✦ hep-ph · hep-th· nucl-th

A Consistent Treatment of Final-State Interactions in NuWro Quasielastic Channel

Rwik Dharmapal Banerjee This is my paper

Pith reviewed 2026-05-10 16:27 UTC · model grok-4.3

classification ✦ hep-ph hep-thnucl-th
keywords final-state interactionsquasielastic scatteringspectral functionMonte Carlo generatorintranuclear cascadeMicroBooNEelectron scatteringneutrino interactions
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The pith

A consistent mapping of final-state interactions between cross-section convolutions and event-level cascade classifications in NuWro improves agreement with inclusive electron-scattering and exclusive MicroBooNE quasielastic data.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper develops a modified treatment of final-state interactions for quasielastic lepton-nucleus scattering inside the spectral function framework of the NuWro Monte Carlo generator. It creates a direct link between inclusive cross-section calculations performed via convolution and an event-by-event implementation that labels interactions as transparent or non-transparent inside the intranuclear cascade. This link lets final-state interaction effects appear uniformly in both inclusive observables and exclusive final-state distributions. When tested against inclusive electron-scattering data and MicroBooNE charge-current quasielastic measurements, the inclusion of final-state interactions under this unified scheme produces visibly better agreement with experiment than earlier treatments.

Core claim

The central claim is that a convolution formalism at the inclusive cross-section level can be placed in one-to-one correspondence with an event-level classification of transparent versus non-transparent interactions inside the NuWro intranuclear cascade, thereby realizing final-state interaction effects consistently across inclusive and exclusive descriptions of quasielastic scattering.

What carries the argument

The unified framework that equates a convolution-based inclusive calculation with an event-by-event transparent/non-transparent classification performed inside the NuWro intranuclear cascade.

If this is right

  • Final-state interaction effects become applicable to both inclusive observables and exclusive final states within the same quasielastic simulation.
  • Predictions for lepton-nucleus quasielastic scattering can be compared simultaneously to inclusive electron data and to exclusive neutrino measurements such as those from MicroBooNE.
  • The treatment removes the previous separation between inclusive and exclusive final-state interaction modeling inside NuWro.
  • Hadron propagation inside the nucleus is now governed by a single set of rules that operates at both the cross-section and event levels.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The same mapping technique could be tested in other Monte Carlo generators or extended to resonant and deep-inelastic channels to check whether consistency improves data agreement more broadly.
  • If the consistency holds, nuclear-effect uncertainties in neutrino oscillation experiments that rely on quasielastic samples may be reduced because inclusive and exclusive constraints can be applied together.
  • The approach highlights that any mismatch between inclusive and exclusive final-state interaction modeling can bias the interpretation of measured cross sections on nuclear targets.

Load-bearing premise

The assumption that the convolution formalism at the cross-section level can be mapped onto an event-level classification of transparent versus non-transparent interactions without introducing inconsistencies.

What would settle it

A direct numerical comparison in which the inclusive cross section obtained from the convolution formula differs measurably from the cross section obtained by reweighting the same events according to the transparent/non-transparent classification would falsify the claimed consistency.

Figures

Figures reproduced from arXiv: 2604.09822 by Rwik Dharmapal Banerjee.

Figure 1
Figure 1. Figure 1: Nuclear transparencies (left) and real parts of the optical potentials (right) implemented in [PITH_FULL_IMAGE:figures/full_fig_p004_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: Inclusive electron-carbon double-differential cross sections calculated within the SF approach [PITH_FULL_IMAGE:figures/full_fig_p006_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: MicroBooNE CC1p0π double-differential cross sections as a function of δpT , compared with smeared NuWro predictions with FSI (solid red line) and without FSI (dashed blue line). 5 Results and Discussion I first present a validation of NuWro prediction with inclusive electron scattering data in [PITH_FULL_IMAGE:figures/full_fig_p006_3.png] view at source ↗
read the original abstract

In this proceeding, I present a modified treatment of final-state interactions (FSI) in quasielastic (QE) lepton-nucleus scattering within the spectra function (SF) framework of the NuWro Monte Carlo generator. Our approach establishes a consistent correspondence between inclusive cross-section calculations and exclusive descriptions of hadron-propagation by combining a convolution-based formalism at the cross-section level with an event-level implementation in which interactions are classified as transparent or non-transparent within the NuWro intranuclear cascade. This unified framework enables realization of FSI effects across inclusive observables and exclusive final states. We demonstrate the impact of this implementation by comparing predictions to both inclusive electron-scattering data and exclusive MicroBooNE measurements of CCQE-dominated observable, showing that the inclusion of FSI leads to a significant improvement in agreement with the data.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

1 major / 0 minor

Summary. The manuscript presents a modified treatment of final-state interactions (FSI) in quasielastic lepton-nucleus scattering within the spectral function (SF) framework of the NuWro Monte Carlo generator. It combines a convolution-based formalism at the inclusive cross-section level with an event-level classification of interactions as transparent or non-transparent inside the NuWro intranuclear cascade. The goal is to establish consistency between inclusive observables and exclusive final-state descriptions. The authors compare predictions to inclusive electron-scattering data and exclusive MicroBooNE CCQE-dominated observables, claiming that inclusion of FSI yields significant improvement in data agreement.

Significance. If the hybrid mapping is validated as consistent, the work could provide a practical bridge between inclusive SF calculations and realistic exclusive event generation in neutrino Monte Carlo tools, with direct relevance to MicroBooNE and other short-baseline experiments. The proceeding offers no quantitative metrics of improvement or parameter-free derivations, limiting its immediate impact.

major comments (1)
  1. The central consistency claim requires that the new hybrid treatment produces inclusive cross sections identical to the prior SF convolution while modifying only exclusive final states. No direct numerical comparison between the modified NuWro inclusive result and the original convolution result is reported; any mismatch would undermine the reported data improvements (see skeptic note on convolution-to-event-level mapping).

Simulated Author's Rebuttal

1 responses · 0 unresolved

We thank the referee for the careful reading of our manuscript and for highlighting the importance of explicitly validating the consistency between the hybrid FSI treatment and the original SF convolution. We address the major comment below and will incorporate the requested comparison in the revised version.

read point-by-point responses

  1. Referee: The central consistency claim requires that the new hybrid treatment produces inclusive cross sections identical to the prior SF convolution while modifying only exclusive final states. No direct numerical comparison between the modified NuWro inclusive result and the original convolution result is reported; any mismatch would undermine the reported data improvements (see skeptic note on convolution-to-event-level mapping).

    Authors: We agree that a direct numerical demonstration of inclusive equivalence is essential to substantiate the consistency claim. By construction, the hybrid implementation classifies interactions as transparent or non-transparent inside the NuWro cascade such that the inclusive cross section is recovered from the same SF convolution used in the original formalism; only the exclusive final-state kinematics are altered. In the revised manuscript we will add a figure (or table) comparing the inclusive differential cross sections (e.g., dσ/dQ² or dσ/dω) obtained with the new NuWro implementation against the pure convolution result, confirming numerical agreement within Monte Carlo statistics. This will also address any potential mapping concerns by showing that the event-level classification preserves the inclusive level while enabling realistic exclusive predictions. revision: yes

Circularity Check

0 steps flagged

No significant circularity; hybrid mapping presented as independent combination validated externally

full rationale

The paper's derivation combines a pre-existing convolution-based SF formalism for inclusive cross sections with an event-level transparent/non-transparent classification inside the NuWro cascade. No equation or claim reduces a prediction to a fitted input, self-defined quantity, or self-citation chain by construction. The central result (improved data agreement) is tested against external inclusive electron-scattering and MicroBooNE exclusive observables rather than being forced by internal redefinition. This satisfies the self-contained benchmark criterion; the absence of an explicit numerical cross-check between modified generator and original convolution is a validation gap but does not constitute circularity under the enumerated patterns.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

Based solely on the abstract, no explicit free parameters, axioms, or invented entities are described. The approach relies on the pre-existing spectral function framework and intranuclear cascade already present in NuWro.

pith-pipeline@v0.9.0 · 5438 in / 1148 out tokens · 35745 ms · 2026-05-10T16:27:09.019448+00:00 · methodology

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Reference graph

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