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arxiv: 2606.23559 · v1 · pith:D6QV3DWGnew · submitted 2026-06-22 · ✦ hep-ex

Probing Nuclear Effects with Transverse Kinematic Imbalance in Muon-neutrino Induced Charged-Current π⁰ Production on Argon with the MicroBooNE Detector

MicroBooNE collaboration: P. Abratenko , D. Andrade Aldana , J. Asaadi , A. Ashkenazi , S. Balasubramanian , B. Baller , A. Barnard , G. Barr
show 186 more authors
D. Barrow J. Barrow V. Basque J. Bateman B. Behera O. Benevides Rodrigues S. Berkman A. Bhat V. Bhelande M. Bhattacharya A. Binau M. Bishai A. Blake B. Bogart T. Bolton M.B. Brunetti L. Camilleri D. Caratelli F. Cavanna G. Cerati A. Chappell Y. Chen J.M. Conrad M. Convery L. Cooper-Troendle J.I. Crespo-Anadon R. Cross M. Del Tutto S.R. Dennis P. Detje R. Diurba Z. Djurcic K. Duffy S. Dytman B. Eberly P. Englezos A. Ereditato J.J. Evans C. Fang W. Foreman B.T. Fleming D. Franco A.P. Furmanski F. Gao D. Garcia-Gamez S. Gardiner G. Ge S. Gollapinni E. Gramellini P. Green H. Greenlee L. Gu W. Gu R. Guenette L. Hagaman M.D. Handley M. Harrison S. Hawkins A. Hergenhan O. Hen C. Hilgenberg G.A. Horton-Smith A. Hussain B. Irwin M.S. Ismail C. James X. Ji J.H. Jo A. Johnson R.A. Johnson D. Kalra G. Karagiorgi A. Kelly W. Ketchum M. Kirby T. Kobilarcik K. Kumar N. Lane J.-Y. Li Y. Li K. Lin B.R. Littlejohn L. Liu S. Liu W.C. Louis X. Luo T. Mahmud N. Majeed C. Mariani J. Marshall F. Martinez Lopez D.A. Martinez Caicedo M.G. Manuel Alves S. Martynenko A. Mastbaum I. Mawby N. McConkey B. McConnell L. Mellet J. Mendez J. Micallef A. Mogan T. Mohayai M. Mooney A.F. Moor C.D. Moore L. Mora Lepin M.A. Hernandez Morquecho M.M. Moudgalya S. Mulleriababu D. Naples A. Navrer-Agasson D. Nawarathne N. Nayak M. Nebot-Guinot C. Nguyen L. Nguyen J. Nowak N. Oza O. Palamara N. Pallat V. Paolone A. Papadopoulou V. Papavassiliou H.B. Parkinson S.F. Pate N. Patel Z. Pavlovic E. Piasetzky K. Pletcher I. Pophale X. Qian J.L. Raaf V. Radeka A. Rafique M. Reggiani-Guzzo J. Rodriguez Rondon M. Rosenberg M. Ross-Lonergan I. Safa C. Sauer D.W. Schmitz A. Schukraft W. Seligman M.H. Shaevitz R. Sharankova J. Shi L. Silva E.L. Snider S. Soldner-Rembold J. Spitz M. Stancari J. St. John T. Strauss A.M. Szelc N. Taniuchi K. Terao C. Thorpe D. Torbunov D. Totani M. Toups A. Trettin Y.-T. Tsai J. Tyler M.A. Uchida T. Usher B. Viren M.L. Velazquez Fernandez J. Wang L. Wang M. Weber H. Wei A.J. White S. Wolbers T. Wongjirad K. Wresilo W. Wu E. Yandel T. Yang L.E. Yates H.W. Yu G.P. Zeller J. Zennamo S. Zhai C. Zhang Y. Zhang
This is my paper

Pith reviewed 2026-06-26 05:44 UTC · model grok-4.3

classification ✦ hep-ex
keywords neutrino-nucleus interactionscharged-current pi0 productiontransverse kinematic imbalanceargon targetfinal-state interactionsresonance interactionsMicroBooNEnuclear effects
0
0 comments X

The pith

Muon-neutrino charged-current pi0 production on argon produces transverse kinematic imbalances that no tested nuclear model reproduces simultaneously.

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

The paper reports the first measurement of muon-neutrino charged-current resonance-like interactions on argon that uses transverse kinematic imbalance variables built from the reconstructed momenta of the muon, leading proton, and neutral pion. These variables are sensitive to final-state interactions inside the nucleus. The measurement provides a detailed characterization of the pi0-proton final state. None of the models examined match all of the measured observables at once. Data of this kind are required to refine interaction modeling for precision oscillation programs such as DUNE.

Core claim

The first measurement of muon neutrino charged-current resonance-like interactions on argon is reported using transverse kinematic imbalance variables constructed from the reconstructed momenta of the muon, leading proton, and neutral pion. These observables probe final-state interactions, and a comprehensive characterization of the pi0-proton final state is given. However, none of the models considered are able to simultaneously reproduce all measured observables.

What carries the argument

Transverse kinematic imbalance variables formed from muon, leading-proton, and neutral-pion momenta; these quantities are constructed to be sensitive to final-state interactions.

If this is right

  • Improved constraints on resonance production and final-state interactions near the DUNE neutrino energy peak.
  • Direct input for tuning neutrino event generators used in oscillation analyses.
  • Identification of specific kinematic regions where current models fail.
  • A benchmark data set for testing future nuclear-effect calculations on argon.

Where Pith is reading between the lines

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

  • The mismatch across observables points to incomplete treatment of pion rescattering or absorption inside the nucleus.
  • Similar imbalance variables could be applied to other final states to isolate different nuclear processes.
  • The measurement supplies a concrete target for new theoretical calculations that aim to describe argon targets without additional free parameters.

Load-bearing premise

The selected events are dominated by resonance-like interactions and the momenta of the muon, proton, and pion are reconstructed with enough accuracy for the imbalance variables to be meaningful.

What would settle it

An independent analysis that either shows the selected sample contains a large non-resonance component or demonstrates that one of the tested models reproduces all observables within the reported uncertainties.

Figures

Figures reproduced from arXiv: 2606.23559 by A. Ashkenazi, A. Barnard, A. Bhat, A. Binau, A. Blake, A. Chappell, A. Ereditato, A.F. Moor, A. Hergenhan, A. Hussain, A. Johnson, A.J. White, A. Kelly, A. Mastbaum, A. Mogan, A.M. Szelc, A. Navrer-Agasson, A. Papadopoulou, A.P. Furmanski, A. Rafique, A. Schukraft, A. Trettin, B. Baller, B. Behera, B. Bogart, B. Eberly, B. Irwin, B. McConnell, B.R. Littlejohn, B.T. Fleming, B. Viren, C.D. Moore, C. Fang, C. Hilgenberg, C. James, C. Mariani, C. Nguyen, C. Sauer, C. Thorpe, C. Zhang, D.A. Martinez Caicedo, D. Andrade Aldana, D. Barrow, D. Caratelli, D. Franco, D. Garcia-Gamez, D. Kalra, D. Naples, D. Nawarathne, D. Torbunov, D. Totani, D.W. Schmitz, E. Gramellini, E.L. Snider, E. Piasetzky, E. Yandel, F. Cavanna, F. Gao, F. Martinez Lopez, G.A. Horton-Smith, G. Barr, G. Cerati, G. Ge, G. Karagiorgi, G.P. Zeller, H.B. Parkinson, H. Greenlee, H. Wei, H.W. Yu, I. Mawby, I. Pophale, I. Safa, J. Asaadi, J. Barrow, J. Bateman, J.H. Jo, J.I. Crespo-Anadon, J.J. Evans, J.L. Raaf, J. Marshall, J.M. Conrad, J. Mendez, J. Micallef, J. Nowak, J. Rodriguez Rondon, J. Shi, J. Spitz, J. St. John, J. Tyler, J. Wang, J.-Y. Li, J. Zennamo, K. Duffy, K. Kumar, K. Lin, K. Pletcher, K. Terao, K. Wresilo, L. Camilleri, L. Cooper-Troendle, L.E. Yates, L. Gu, L. Hagaman, L. Liu, L. Mellet, L. Mora Lepin, L. Nguyen, L. Silva, L. Wang, M.A. Hernandez Morquecho, M.A. Uchida, M.B. Brunetti, M. Bhattacharya, M. Bishai, M. Convery, M. Del Tutto, M.D. Handley, M.G. Manuel Alves, M. Harrison, M.H. Shaevitz, MicroBooNE collaboration: P. Abratenko, M. Kirby, M.L. Velazquez Fernandez, M.M. Moudgalya, M. Mooney, M. Nebot-Guinot, M. Reggiani-Guzzo, M. Rosenberg, M. Ross-Lonergan, M.S. Ismail, M. Stancari, M. Toups, M. Weber, N. Lane, N. Majeed, N. McConkey, N. Nayak, N. Oza, N. Pallat, N. Patel, N. Taniuchi, O. Benevides Rodrigues, O. Hen, O. Palamara, P. Detje, P. Englezos, P. Green, R.A. Johnson, R. Cross, R. Diurba, R. Guenette, R. Sharankova, S. Balasubramanian, S. Berkman, S. Dytman, S.F. Pate, S. Gardiner, S. Gollapinni, S. Hawkins, S. Liu, S. Martynenko, S. Mulleriababu, S.R. Dennis, S. Soldner-Rembold, S. Wolbers, S. Zhai, T. Bolton, T. Kobilarcik, T. Mahmud, T. Mohayai, T. Strauss, T. Usher, T. Wongjirad, T. Yang, V. Basque, V. Bhelande, V. Paolone, V. Papavassiliou, V. Radeka, W.C. Louis, W. Foreman, W. Gu, W. Ketchum, W. Seligman, W. Wu, X. Ji, X. Luo, X. Qian, Y. Chen, Y. Li, Y.-T. Tsai, Y. Zhang, Z. Djurcic, Z. Pavlovic.

Figure 1
Figure 1. Figure 1: FIG. 1. Illustration of the transverse kinematic imbalance [PITH_FULL_IMAGE:figures/full_fig_p003_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: FIG. 2. Muon selection efficiency as a function of true muon [PITH_FULL_IMAGE:figures/full_fig_p006_2.png] view at source ↗
Figure 4
Figure 4. Figure 4: FIG. 4. Reconstructed [PITH_FULL_IMAGE:figures/full_fig_p007_4.png] view at source ↗
Figure 5
Figure 5. Figure 5: FIG. 5. Reconstructed distributions of basic kinematic observables for FC events: (a) muon kinetic energy, (b) muon angle, [PITH_FULL_IMAGE:figures/full_fig_p011_5.png] view at source ↗
Figure 6
Figure 6. Figure 6: FIG. 6. Reconstructed distributions of transverse kinematic imbalance observables for FC events: (a) transverse momentum [PITH_FULL_IMAGE:figures/full_fig_p012_6.png] view at source ↗
Figure 7
Figure 7. Figure 7: FIG. 7. Final unfolded differential cross sections for the [PITH_FULL_IMAGE:figures/full_fig_p014_7.png] view at source ↗
Figure 8
Figure 8. Figure 8: FIG. 8. Final unfolded differential cross sections for transverse kinematic imbalance observables. The error bars represent [PITH_FULL_IMAGE:figures/full_fig_p015_8.png] view at source ↗
Figure 9
Figure 9. Figure 9: FIG. 9. Neutral-pion kinetic-energy cross section predicted [PITH_FULL_IMAGE:figures/full_fig_p018_9.png] view at source ↗
Figure 12
Figure 12. Figure 12: FIG. 12. Two-dimensional distributions of [PITH_FULL_IMAGE:figures/full_fig_p018_12.png] view at source ↗
Figure 10
Figure 10. Figure 10: FIG. 10. Neutral-pion kinetic-energy cross sections pre [PITH_FULL_IMAGE:figures/full_fig_p018_10.png] view at source ↗
Figure 13
Figure 13. Figure 13: FIG. 13. Ratio of the [PITH_FULL_IMAGE:figures/full_fig_p019_13.png] view at source ↗
Figure 14
Figure 14. Figure 14: FIG. 14 [PITH_FULL_IMAGE:figures/full_fig_p019_14.png] view at source ↗
read the original abstract

Neutrino-nucleus cross-section measurements are needed to improve interaction modeling and to enable precision neutrino oscillation measurements in upcoming experiments such as the Deep Underground Neutrino Experiment (DUNE), Hyper-Kamiokande, and the Short-Baseline Neutrino program. Baryon-resonance neutrino interactions constitute a dominant contribution near the peak of the DUNE neutrino energy spectrum. We present the first measurement of muon neutrino charged-current resonance-like interactions on argon using transverse kinematic imbalance variables with the MicroBooNE detector. These observables are highly sensitive to the modeling of final-state interactions. This measurement probes kinematic imbalances using the reconstructed momenta of the muon, leading proton, and neutral pion. A comprehensive characterization of the $\pi^0$-proton final state is presented; however, none of the models considered are able to simultaneously reproduce all measured observables.

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

2 major / 0 minor

Summary. The manuscript reports the first measurement of muon-neutrino charged-current resonance-like interactions on argon using transverse kinematic imbalance observables constructed from reconstructed muon, leading-proton, and neutral-pion momenta in the MicroBooNE detector. A comprehensive characterization of the π⁰-proton final state is presented, with the central conclusion that none of the models considered simultaneously reproduce all measured observables.

Significance. If robust, the result supplies the first argon-target data on transverse kinematic imbalance in the resonance region, directly testing final-state interaction modeling that is critical for DUNE and SBN oscillation analyses. The choice of transverse imbalance variables is a methodological strength because they are designed to isolate nuclear effects with reduced dependence on the incoming neutrino energy.

major comments (2)
  1. [Event selection] Event selection and sample composition: the central claim that discrepancies with models reflect deficiencies in FSI modeling presupposes that the selected sample is dominated by resonance-like CC interactions. No purity, background fraction, or efficiency-corrected yield is quoted, leaving open the possibility that non-resonant or mis-reconstructed contributions drive the reported model failures.
  2. [Reconstruction and detector response] Momentum reconstruction and resolution: the transverse imbalance observables rely on accurate reconstruction of muon, proton, and especially π⁰ (two-photon) momenta. No resolution functions, bias studies, or efficiency numbers for these three particles are supplied, which directly affects whether the observed model disagreements can be interpreted as physics rather than reconstruction artifacts.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for their detailed and constructive feedback on our manuscript. We have carefully considered each major comment and provide point-by-point responses below. Where appropriate, we have revised the manuscript to address the concerns raised.

read point-by-point responses

  1. Referee: [Event selection] Event selection and sample composition: the central claim that discrepancies with models reflect deficiencies in FSI modeling presupposes that the selected sample is dominated by resonance-like CC interactions. No purity, background fraction, or efficiency-corrected yield is quoted, leaving open the possibility that non-resonant or mis-reconstructed contributions drive the reported model failures.

    Authors: We agree that explicit quantification of the sample composition is essential to support our conclusions. In the revised manuscript, we have added a new subsection detailing the event selection criteria, along with estimates of the purity of the resonance-like CCπ⁰ sample (approximately 70% based on simulation), background contributions from non-resonant and other processes, and efficiency-corrected yields. These additions demonstrate that the selected events are predominantly from resonance-like interactions, thereby reinforcing that the observed discrepancies with models are attributable to deficiencies in FSI modeling rather than sample impurities. revision: yes

  2. Referee: [Reconstruction and detector response] Momentum reconstruction and resolution: the transverse imbalance observables rely on accurate reconstruction of muon, proton, and especially π⁰ (two-photon) momenta. No resolution functions, bias studies, or efficiency numbers for these three particles are supplied, which directly affects whether the observed model disagreements can be interpreted as physics rather than reconstruction artifacts.

    Authors: We acknowledge the importance of documenting the reconstruction performance. The revised manuscript now includes dedicated figures and text presenting the momentum resolution functions for the muon, leading proton, and π⁰, as well as bias studies and efficiency numbers obtained from both Monte Carlo simulations and data-driven techniques. These studies show that the resolutions are sufficient for the transverse imbalance observables and that the model disagreements persist even after accounting for reconstruction effects, indicating they reflect underlying physics modeling issues. revision: yes

Circularity Check

0 steps flagged

No circularity: experimental measurement with external model comparison

full rationale

This is a pure measurement paper that extracts transverse kinematic imbalance observables directly from MicroBooNE detector data on argon and compares them to pre-existing external models. No parameters are fitted inside the paper and then relabeled as predictions; no derivation chain reduces to self-definition or self-citation; the central result (model discrepancies) rests on data rather than on any internal ansatz or uniqueness theorem. The reader's note correctly identifies the work as non-circular.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

Abstract-only; no explicit free parameters, axioms, or invented entities are stated. Standard assumptions of particle reconstruction and event selection are implicit but not detailed.

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discussion (0)

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