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Evidence for Neutral-Current Diffractive π0 Production from Hydrogen in Neutrino Interactions on Hydrocarbon

Wolcott, J; Aliaga, L; Altinok, O; Bercellie, A; Betancourt, M; Bodek, A; Bravar, A; ... Zhang, D; + view all (2016) Evidence for Neutral-Current Diffractive π0 Production from Hydrogen in Neutrino Interactions on Hydrocarbon. Physical Review Letters , 117 (11) , Article 111801. 10.1103/PhysRevLett.117.111801. Green open access

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Abstract

The MINERvA experiment observes an excess of events containing electromagnetic showers relative to the expectation from Monte Carlo simulations in neutral-current neutrino interactions with mean beam energy of 4.5 GeV on a hydrocarbon target. The excess is characterized and found to be consistent with neutral-current π0 production with a broad energy distribution peaking at 7 GeV and a total cross section of 0.26±0.02(stat.)±0.08(sys.)×10-39 cm2. The angular distribution, electromagnetic shower energy, and spatial distribution of the energy depositions of the excess are consistent with expectations from neutrino neutral-current diffractive π0 production from hydrogen in the hydrocarbon target. These data comprise the first direct experimental observation and constraint for a reaction that poses an important background process in neutrino-oscillation experiments searching for νμ to νe oscillations.

Type: Article
Title: Evidence for Neutral-Current Diffractive π0 Production from Hydrogen in Neutrino Interactions on Hydrocarbon
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.117.111801
Publisher version: http://doi.org/10.1103/PhysRevLett.117.111801
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/10065102
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