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

Abstract

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.

Authors:
;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
MINERvA
OSTI Identifier:
1562172
Alternate Identifier(s):
OSTI ID: 1542961
Report Number(s):
arXiv:1906.08300; FERMILAB-PUB-18-578-ND
oai:inspirehep.net:1740745
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Published Article
Journal Name:
Phys.Rev.
Additional Journal Information:
Journal Volume: D100; Journal Issue: 5
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Le, T., and et al. Measurement of $\bar{\nu}_{\mu}$ charged-current single $\pi^{-}$ production on hydrocarbon in the few-GeV region using MINERvA. United States: N. p., 2019. Web. doi:10.1103/PhysRevD.100.052008.
Le, T., & et al. Measurement of $\bar{\nu}_{\mu}$ charged-current single $\pi^{-}$ production on hydrocarbon in the few-GeV region using MINERvA. United States. doi:10.1103/PhysRevD.100.052008.
Le, T., and et al. Tue . "Measurement of $\bar{\nu}_{\mu}$ charged-current single $\pi^{-}$ production on hydrocarbon in the few-GeV region using MINERvA". United States. doi:10.1103/PhysRevD.100.052008.
@article{osti_1562172,
title = {Measurement of $\bar{\nu}_{\mu}$ charged-current single $\pi^{-}$ production on hydrocarbon in the few-GeV region using MINERvA},
author = {Le, T. and et al.},
abstractNote = {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.},
doi = {10.1103/PhysRevD.100.052008},
journal = {Phys.Rev.},
number = 5,
volume = D100,
place = {United States},
year = {2019},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevD.100.052008

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