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.
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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 |
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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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