Электронный каталог

Статья

Abe, K.
First Measurement of Neutron Capture Multiplicity in Neutrino-Oxygen Neutral-Current Quasielastic Ingteractions Using an Accelerator Neutrino Beam / K.Abe, V.Baranov, Yu.I.Davydov, V.Kiseeva, I.A.Suslov, V.V.Tereschenko, I.Vasilyev, [a.o.]. – Text : electronic // Physical Review D. – 2025. – Vol. 112, No. 3. – P. 032003. – URL: https://doi.org/10.1103/qh28-4znk. – Bibliogr.: 106.

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 ×10*2*0 protons on target. The 𝛾 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.)&sup(+0.17)&sub(−0.27) (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.



ОИЯИ = ОИЯИ (JINR)2025