Measurements of the electron neutrino-argon differential cross section without pions in the final state in MicroBooNE

A. Ashkenazi; A. Barnard; A. Bhat; A. Binau; A. Blake; A. Chappell; A. Ereditato; A.F. Moor; A. Hergenhan; A. Hussain

MicroBooNE measures electron-neutrino–argon cross sections without pions and finds good lepton agreement but proton-angle discrepancies.

Reviewed by Pith at T0; open to challenge. T0 means a machine referee read the full paper against a public rubric. the ladder, T0–T4 →

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T0 review · grok-4.5

2026-07-14 21:43 UTC pith:5YODA6GN

load-bearing objection Full-dataset MicroBooNE νe–Ar CC0π differentials (including proton–electron angle) with the usual lepton-good / hadronic-discrepant pattern; useful for LArTPC systematics once the full paper appears. the 2 major comments →

arxiv 2603.13593 v2 pith:5YODA6GN submitted 2026-03-13 hep-ex

Measurements of the electron neutrino-argon differential cross section without pions in the final state in MicroBooNE

MicroBooNE collaboration: P. Abratenko , D. Andrade Aldana , L. Arellano , J. Asaadi , A. Ashkenazi , S. Balasubramanian , B. Baller , A. Barnard

show 184 more authors

G. Barr D. Barrow J. Barrow V. Basque J. Bateman B. Behera O. Benevides Rodrigues S. Berkman A. Bhat M. Bhattacharya V. Bhelande 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 B.T. Fleming W. Foreman 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 O. Hen A. Hergenhan M. Harrison S. Hawkins 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 W. Ketchum A. Kelly 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 D.A. Martinez Caicedo F. Martinez Lopez M. G. Manuel Alves S. Martynenko A. Mastbaum I. Mawby N. McConkey B. McConnell L. Mellet J. Mendez J. Micallef T. Mohayai A. Mogan M. Mooney A.F. Moor C.D. Moore L. Mora Lepin M. A. Hernandez Morquecho M.M. Moudgalya S. Mulleria Babu D. Naples A. Navrer-Agasson N. Nayak M. Nebot-Guinot C. Nguyen L. Nguyen J. Nowak N. Oza O. Palamara N. Pallat V. Paolone A. Papadopoulou V. Papavassiliou H. 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 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 C. Zhang Y. Zhang

This is my paper

classification hep-ex

keywords electron neutrinoargoncharged-current cross sectionMicroBooNEBooster Neutrino BeamCC0pidifferential cross sectionproton kinematics

verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved

The pith

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

The MicroBooNE collaboration extracts differential charged-current cross sections for electron neutrinos on argon using the full Booster Neutrino Beam exposure of 1.3×10²¹ protons on target. The analysis targets events with no pions in the final state, reported both with and without protons above the kinetic-energy visibility threshold, and unfolds the results in electron energy and angle, proton kinematics, and the angle between the electron and proton. The central claim is that most neutrino-interaction generators reproduce the leptonic distributions well, while the hadronic sector—especially the proton angle relative to the beam and to the lepton—shows clear model discrepancies. A sympathetic reader cares because electron-neutrino argon cross sections are a direct input to oscillation analyses and sterile-neutrino searches that use the same detector technology; any mismatch between data and the generators used for prediction therefore propagates into those physics results.

Core claim

Using the complete MicroBooNE Booster Neutrino Beam dataset, the collaboration measures differential electron-neutrino charged-current cross sections on argon for final states that contain no pions, both with and without protons above the visibility threshold, and finds that generator models agree well with the observed lepton kinematics while exhibiting discrepancies in the hadronic system, most notably in proton angle.

What carries the argument

The unfolded double-differential cross section in electron and proton kinematics (energy, beam angle, and electron–proton opening angle) for the CC0π final state, obtained after efficiency correction and background subtraction on the full 1.3×10²¹ POT sample.

Load-bearing premise

That events can be cleanly tagged as containing no pions and that protons above the kinetic-energy visibility threshold are reconstructed with efficiencies and backgrounds that do not bias the unfolded differential cross sections.

What would settle it

A statistically independent electron-neutrino argon dataset (different beam or detector) that measures the same CC0π proton-angle distribution and finds either agreement with the discrepant generators or a different angular shape than MicroBooNE reports.

Watch this falsifier — get emailed when new claim-graph text bears on it.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit.

Desk Editor's Note

Full-dataset MicroBooNE νe–Ar CC0π differentials (including proton–electron angle) with the usual lepton-good / hadronic-discrepant pattern; useful for LArTPC systematics once the full paper appears.

read the letter

The one thing worth knowing is that MicroBooNE has extracted differential electron-neutrino–argon charged-current cross sections without pions, using the complete BNB exposure of 1.3×10^21 POT, and they include the proton–electron opening angle. Lepton kinematics agree with most generators; the hadronic system, especially proton angle, does not.

What is actually new is the full-dataset multi-variable extraction (electron and proton energy and angle, plus the opening angle) for the CC0π channel, both with and without protons above the kinetic-energy visibility threshold. Earlier MicroBooNE and other LArTPC results covered related channels, so this is a solid extension rather than a first-ever measurement, but the statistics and the kinematic coverage matter for DUNE, SBND and ICARUS interaction-model systematics. The generator comparisons are the useful part: they flag where the models are fine and where they are not.

The soft spot is the one you always get with an abstract-only look. Clean classification as “no pions,” proton reconstruction above threshold, efficiency corrections, and unfolding all rest on detector response, pion mis-ID, and FSI modeling. Those assumptions are load-bearing and standard for the field, but you cannot audit the matrices, covariance, or background subtraction from the abstract. Nothing visible suggests circularity or an internal contradiction; the concern is simply unresolvable until the full paper and data products appear. Residual model dependence in the efficiency correction is the usual domain issue, not a red flag unique to this work.

This is for people who care about argon neutrino interaction modeling or electron-neutrino appearance systematics. If that is your reading group, it is worth a look once the full text is out. It is a serious collaboration measurement and deserves a proper referee. I would send it to peer review without hesitation.

Referee Report

2 major / 0 minor

Summary. The manuscript reports a measurement of electron-neutrino charged-current cross sections on argon without pions in the final state (CC0π), using the full MicroBooNE Booster Neutrino Beam exposure of 1.3×10^21 protons on target. Events are analyzed both with and without protons above the kinetic-energy visibility threshold. Differential cross sections are extracted in electron and proton kinematics (energy and angle relative to the beam) and in the angle between the proton and electron. The results are compared to several neutrino-interaction generators employing different nuclear and interaction models. The abstract states good agreement with most models in lepton kinematics and discrepancies in the hadronic system, especially proton angle.

Significance. If the analysis holds under full scrutiny, this is a useful addition to the sparse set of νe–Ar differential cross-section data. Full-dataset MicroBooNE statistics, dual proton-threshold selections, and lepton–hadron angular correlations are of direct interest for nuclear modeling and for LArTPC oscillation experiments (including DUNE). Generator comparisons that isolate hadronic discrepancies are community-relevant. The measurement is standard in form for an established collaboration; significance rests on the quality of selection, unfolding, and systematics rather than on a novel method.

major comments (2)

Only the abstract is available for this review. The central claim—differential νe–Ar CC0π cross sections with/without protons above the KE visibility threshold—cannot be audited for selection purity, pion rejection, proton reconstruction efficiency, unfolding method, flux treatment, background subtraction, or systematic covariance. No load-bearing technical error is visible in the abstract itself, but neither can soundness be established. A full manuscript is required before a definitive recommendation.
Abstract: the classification “without pions in the final state” and the proton kinetic-energy visibility threshold are load-bearing for the reported differentials and for the claimed hadronic discrepancies (especially proton angle). Residual model dependence from pion mis-identification, FSI modeling in efficiency corrections, and detector response must be quantified with efficiency matrices, sideband constraints, and systematic breakdowns; these are not assessable from the abstract alone.

Circularity Check

0 steps flagged

No circularity: experimental cross-section measurement vs external generators; abstract-only review shows no self-definitional or fitted-as-prediction loop.

full rationale

This is an experimental measurement paper from the MicroBooNE collaboration. The abstract reports extraction of differential electron-neutrino–argon charged-current cross sections without pions in the final state (with and without protons above the kinetic-energy visibility threshold) from the full Booster Neutrino Beam dataset, followed by comparison to external generator predictions. No equations, fitted parameters re-presented as predictions, uniqueness theorems, or self-citation chains appear in the available text. Residual model dependence in efficiency/unfolding corrections is a standard experimental systematic, not a circular derivation of the reported cross sections. Per the hard rules for abstract-only reviews of self-contained experimental results against external benchmarks, the honest finding is score 0 with empty steps.

Axiom & Free-Parameter Ledger

0 free parameters · 3 axioms · 0 invented entities

As an experimental cross-section measurement the central claim rests on standard HEP domain assumptions (beam flux, detector response, nuclear final-state interactions for efficiency) rather than free parameters fitted to produce the result or newly invented entities. Without the full paper the precise flux model, efficiency-correction models, and any ad-hoc selection cuts cannot be enumerated exhaustively; the ledger therefore records the load-bearing domain assumptions visible from the abstract.

axioms (3)

domain assumption Booster Neutrino Beam electron-neutrino flux prediction is known to sufficient accuracy to convert event rates into absolute cross sections.
Absolute differential cross sections require an external flux; any flux bias scales the entire result. Invoked by the claim of a measured cross section on the full POT dataset.
domain assumption Events can be selected as charged-current with no final-state pions, and protons above the kinetic-energy visibility threshold can be identified, with efficiencies and backgrounds that do not distort the extracted differentials.
The CC0π (with/without proton) classification and the proton-visibility cut are load-bearing for the reported channel and for the hadronic kinematics that show tension with generators.
domain assumption Detector response, reconstruction, and unfolding procedures correctly map reconstructed electron and proton kinematics to true kinematics.
Differential cross sections in energy and angle are only as reliable as the migration matrix and efficiency model; these are standard but uncheckable from the abstract alone.

pith-pipeline@v1.1.0-grok45 · 7093 in / 2390 out tokens · 30732 ms · 2026-07-14T21:43:42.669530+00:00 · methodology

0 comments

read the original abstract

We present a new measurement of the electron neutrino charged current cross section on argon without pions in the final state. This measurement uses the full MicroBooNE Booster Neutrino Beam dataset of $1.3\times 10^{21}$ protons on target collected at Fermi National Accelerator Laboratory. Events are considered both with and without protons above the kinetic energy visibility threshold. Differential cross sections are extracted in proton and electron kinematics, including energy and angle relative to the neutrino beam direction. The relationship between the hadronic and leptonic systems is explored through the angle between the proton and electron directions. The resulting cross sections are compared to a variety of available generator predictions using different models of neutrino interactions. We find good agreement with most models in lepton kinematics and some discrepancies in the hadronic system modeling, particularly in proton angle.

discussion (0)

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