Measurement of ${\overline{\nu }}_{\mu }$ charged-current single ${\pi }^{-}$ production on hydrocarbon in the few-GeV region using MINERvA

Journal Article · Mon Sep 16 00:00:00 EDT 2019 · Physical Review. D.

DOI:https://doi.org/10.1103/PhysRevD.100.052008· OSTI ID:1562172

Le, T.; Akbar, F.; Aliaga, L.; Andrade, D. A.; Ascencio, M. V.; Bashyal, A.; Bercellie, A.; Betancourt, M.; Bodek, A.; Bonilla, J. L.; Bravar, A.; Budd, H.; Caceres, G.; Cai, T.; Carneiro, M. F.; Coplowe, D.; Dytman, S. A.; Díaz, G. A.; Felix, J.; Fields, L. ; Filkins, A.; Fine, R.; Fiza, N.; Gago, A. M.; Gallagher, H.; Ghosh, A.; Gran, R.; Harris, D. A.; Henry, S.; Jena, S.; Kleykamp, J.; Kordosky, M.; Last, D.; Lu, X. -G.; Maher, E.; Manly, S.; Mann, W. A. ; Mauger, C.; McFarland, K. S.; McGowan, A. M.; Messerly, B.; Miller, J.; Morfín, J. G.; Naples, D.; Nelson, J. K.; Nguyen, C.; Norrick, A.; Nuruzzaman,; Olivier, A.; Paolone, V.; Perdue, G. N.; Ramírez, M. A.; Ransome, R. D.; Ray, H.; Rimal, D.; Ruterbories, D.; Schellman, H.; Sobczyk, J. T.; Salinas, C. J. Solano; Su, H.; Sultana, M.; Syrotenko, V. S.; Valencia, E.; Wospakrik, M.; Yaeggy, B.; Zazueta, L.

The antineutrino scattering channel $$\bar{\nu}_{\mu} \,\text{CH} \rightarrow \mu^{+} \,\pi^{-} \,X$$(nucleon(s)) is analyzed in the incident energy range 1.5 to 10 GeV using the MINERvA detector at Fermilab. Differential cross sections are reported as functions of $$\mu^{+}$$ momentum and production angle, $$\pi^{-}$$ kinetic energy and production angle, and antineutrino energy and squared four-momentum transfer. Distribution shapes are generally reproduced by simulations based on the GENIE, NuWro, and GiBUU event generators, however GENIE (GiBUU) overestimates (underestimates) the cross-section normalizations by 8% (10%). Comparisons of data with the GENIE-based reference simulation probe conventional treatments of cross sections and pion intranuclear rescattering. The distribution of non-track vertex energy is used to decompose the signal sample into reaction categories, and cross sections are determined for the exclusive reactions $$\mu^{+} \pi^{-} n$$ and $$ \mu^+ \pi^{-} p$$. A similar treatment applied to the published MINERvA sample $$\bar{\nu}_{\mu} \,\text{CH} \rightarrow \mu^{+} \,\pi^{0} \,X$$(nucleon(s)) has determined the $$\mu^{+} \pi^{0} n$$ cross section, and the latter is used with $$\sigma(\pi^{-} n)$$ and $$\sigma(\pi^{-} p)$$ to carry out an isospin decomposition of $$\bar{\nu}_{\mu}$$-induced CC($$\pi$$). The ratio of magnitudes and relative phase for isospin amplitudes $$A_{3}$$ and $$A_{1}$$ thereby obtained are: $$R^{\bar{\nu}} = 0.99 \pm 0.19$$ and $$\phi^{\bar{\nu}} = 93^{\circ} \pm 7^{\circ}$$. Our results are in agreement with bubble chamber measurements made four decades ago.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Univ. of Rochester, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: MINERvA Collaboration
• Grant/Contract Number: SC0008475; AC02-07CH11359
• OSTI ID: 1562172
• Alternate ID(s): OSTI ID: 1542961; OSTI ID: 1607734; OSTI ID: 1721475
• Report Number(s): arXiv:1906.08300; FERMILAB-PUB-18-578-ND; PRVDAQ; 052008
• Journal Information: Physical Review. D., Journal Name: Physical Review. D. Vol. 100 Journal Issue: 5; ISSN 2470-0010
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

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