Электронный каталог

Статья

Agafonova, N.
Updated Constraints on Sterile Neutrino Mixing in the OPERA Experiment Using a New *n&sub(e) Identification Method / N.Agafonova, A.Chukanov, S.Dmitrievsky, Y.Gornushkin, A.Sotnikov, S.Vasina, [a.o.] // Progress of Theoretical and Experimental Physics [Electronic resource]. – 2023. – Vol. 2023, No. 3. – P. 033C01. – URL: https://doi.org/10.1093/ptep/ptad012. – Bibliogr.: 33.

This paper describes a new νe identification method specifically designed to improve the low-energy (< 30 GeV) νe identification efficiency attained by enlarging the emulsion film scanning volume with the next-generation emulsion readout system. A relative increase of 25–70% in the νe low-energy region is expected, leading to improvements in the OPERA sensitivity to neutrino oscillations in the framework of the 3 + 1 model. The method is applied to a subset of data where the detection efficiency increase is expected to be more relevant, and one additional νe candidate is found. The analysis combined with the ν τ ap- pearance results improves the upper limit on sin 2 2θ μe to 0.016 at 90% C.L. in the Mini- BooNE allowed region *Dm*2 41 ∼ 0.3 eV2 .



ОИЯИ = ОИЯИ (JINR)2023
Спец.(статьи,препринты) = С 344.1х - Методы регистрации нейтрино