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arXiv · 2610.39042

Measurements of transverse kinematic imbalance in muon neutrino charged-current interactions on argon with a single proton and no pions in the final state with SBND

R. Acciarri·L. Aliaga-Soplin·D. Andrade Aldana·C. Andreopoulos·A. Antonakis·S. Balasubramanian·A. Barnard·V. Basque·J. R. Bateman·A. Beever·B. Behera·M. Betancourt·A. Bhat·M. Bishai·A. Blake·B. Bogart·D. Brailsford·A. Brandt·S. Brickner·M. B. Brunetti·G. A. N. Buzzard·L. Camilleri·D. Caratelli·D. Carber·B. Carlson·M. F. Carneiro·R. Castillo Fernandez·F. Cavanna·A. Chappell·H. Chen·S. Chung·R. Coackley·J. I. Crespo-Anadón·C. Cuesta·Y. Dabburi·O. Dalager·M. Dall'Olio·S. K. Das·M. Del Tutto·Z. Djurcic·V. do Lago Pimentel·S. Dominguez-Vidales·M. Donnachie·M. Dubnowski·K. Duffy·S. Dytman·A. Ereditato·E. Espinoza·J. J. Evans·A. C. Ezeribe·C. Fan·A. Filkins·B. Fleming·W. Foreman·D. Franco·G. Fricano·I. Furic·A. P. Furmanski·S. Gao·D. Garcia-Gamez·S. Gardiner·I. Gil-Botella·S. Gollapinni·P. Green·W. C. Griffith·L. Hagaman·P. Hamilton·B. Harris·A. Hergenhan·M. Hernandez-Morquecho·C. James·R. S. Jones·M. Jung·T. Junk·D. Kalra·G. Karagiorgi·F. Kumar·L. Kashur·K. J. Kelly·W. Ketchum·M. J. King·J. Klein·L. Kotsiopoulou·I. Kreslo·T. Kroupová·V. A. Kudryavtsev·H. Lay·R. LaZur·J. -Y. Li·K. Lin·B. R. Littlejohn·L. Liu·D. Lorca·W. C. Louis·X. Luo·A. A. Machado·P. Machado·C. Mariani·F. Marinho·J. Marshall
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Abstract

This letter presents the first neutrino-argon cross-section measurement from the Short-Baseline Near Detector (SBND) at the Fermi National Accelerator Laboratory. We report the nominal flux-averaged single-differential cross sections of muon neutrino charged-current interactions on argon with a single proton and no pions in the final state as functions of the transverse kinematic imbalance variables. Using a subset of Run~1 data corresponding to $8.8\times10^{19}$ protons-on-target, we select 12,804 signal candidates with a purity of 91%. The extracted cross sections discriminate strongly among event-generator predictions, owing to the high statistics and the design of the analysis. Among the compared models, none successfully describes all three variables, with the largest discrepancies in the transverse missing momentum variable. These results set new benchmarks for neutrino-argon interaction modeling, which is crucial for high-precision measurements at current and future accelerator neutrino experiments.

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R. Acciarri, L. Aliaga-Soplin, D. Andrade Aldana, C. Andreopoulos, A. Antonakis, S. Balasubramanian, A. Barnard, V. Basque, J. R. Bateman, A. Beever, B. Behera, M. Betancourt, A. Bhat, M. Bishai, A. Blake, B. Bogart, D. Brailsford, A. Brandt, S. Brickner, M. B. Brunetti, G. A. N. Buzzard, L. Camilleri, D. Caratelli, D. Carber, B. Carlson, M. F. Carneiro, R. Castillo Fernandez, F. Cavanna, A. Chappell, H. Chen, S. Chung, R. Coackley, J. I. Crespo-Anadón, C. Cuesta, Y. Dabburi, O. Dalager, M. Dall'Olio, S. K. Das, M. Del Tutto, Z. Djurcic, V. do Lago Pimentel, S. Dominguez-Vidales, M. Donnachie, M. Dubnowski, K. Duffy, S. Dytman, A. Ereditato, E. Espinoza, J. J. Evans, A. C. Ezeribe, C. Fan, A. Filkins, B. Fleming, W. Foreman, D. Franco, G. Fricano, I. Furic, A. P. Furmanski, S. Gao, D. Garcia-Gamez, S. Gardiner, I. Gil-Botella, S. Gollapinni, P. Green, W. C. Griffith, L. Hagaman, P. Hamilton, B. Harris, A. Hergenhan, M. Hernandez-Morquecho, C. James, R. S. Jones, M. Jung, T. Junk, D. Kalra, G. Karagiorgi, F. Kumar, L. Kashur, K. J. Kelly, W. Ketchum, M. J. King, J. Klein, L. Kotsiopoulou, I. Kreslo, T. Kroupová, V. A. Kudryavtsev, H. Lay, R. LaZur, J. -Y. Li, K. Lin, B. R. Littlejohn, L. Liu, D. Lorca, W. C. Louis, X. Luo, A. A. Machado, P. Machado, C. Mariani, F. Marinho, J. Marshall. 2026-10-28. Measurements of transverse kinematic imbalance in muon neutrino charged-current interactions on argon with a single proton and no pions in the final state with SBND. https://arxiv.org/abs/2610.39042

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