We report the first measurement of neutron capture multiplicity in neutrino-oxygen neutral-current quasielasticlike interactions at the gadolinium-loaded Super-Kamiokande detector using the T2K neutrino beam, which has a peak energy of about 0.6 GeV. A total of 30 neutral-current quasielasticlike event candidates were selected from T2K data corresponding to an exposure of 1.76 x 10(20) protons on target. The. ray signals resulting from neutron captures were identified using a neural network. The flux-averaged mean neutron capture multiplicity was measured to be 1.37 +/- 0.33 (stat.)(-0.27)(+0.17) (syst.), which is compatible within 2.3 sigma than predictions obtained using our nominal simulation. We discuss potential sources of systematic uncertainty in the prediction and demonstrate that a significant portion of this discrepancy arises from the modeling of hadron-nucleus interactions in the detector medium.

First measurement of neutron capture multiplicity in neutrino-oxygen neutral-current quasielasticlike interactions using an accelerator neutrino beam / Abe, K., Abe, S., Akutsu, R., Alarakia-Charles, H., Alj Hakim, Y. i., Alonso Monsalve, S., Anthony, L., Aoki, S., Apte, K. a., Arai, T., Arihara, T., Arimoto, S., Ashida, Y., Atkin, E. t., Babu, N., Baranov, V., Barker, G. j., Barr, G., Barrow, D., Bates, P., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - ELETTRONICO. - 112:3(2025). [10.1103/qh28-4znk]

First measurement of neutron capture multiplicity in neutrino-oxygen neutral-current quasielasticlike interactions using an accelerator neutrino beam

Berardi, V.
Membro del Collaboration Group
;
Calabria, N.  F.;Magaletti, L.
Membro del Collaboration Group
;
Spina, R.
Membro del Collaboration Group
;
2025

Abstract

We report the first measurement of neutron capture multiplicity in neutrino-oxygen neutral-current quasielasticlike interactions at the gadolinium-loaded Super-Kamiokande detector using the T2K neutrino beam, which has a peak energy of about 0.6 GeV. A total of 30 neutral-current quasielasticlike event candidates were selected from T2K data corresponding to an exposure of 1.76 x 10(20) protons on target. The. ray signals resulting from neutron captures were identified using a neural network. The flux-averaged mean neutron capture multiplicity was measured to be 1.37 +/- 0.33 (stat.)(-0.27)(+0.17) (syst.), which is compatible within 2.3 sigma than predictions obtained using our nominal simulation. We discuss potential sources of systematic uncertainty in the prediction and demonstrate that a significant portion of this discrepancy arises from the modeling of hadron-nucleus interactions in the detector medium.
2025
First measurement of neutron capture multiplicity in neutrino-oxygen neutral-current quasielasticlike interactions using an accelerator neutrino beam / Abe, K., Abe, S., Akutsu, R., Alarakia-Charles, H., Alj Hakim, Y. i., Alonso Monsalve, S., Anthony, L., Aoki, S., Apte, K. a., Arai, T., Arihara, T., Arimoto, S., Ashida, Y., Atkin, E. t., Babu, N., Baranov, V., Barker, G. j., Barr, G., Barrow, D., Bates, P., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - ELETTRONICO. - 112:3(2025). [10.1103/qh28-4znk]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/294884
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