Publication:
New Results of Measurements in the Neutrino-4 Experiment Devoted to Searches for Sterile Neutrinos

Дата
2020
Авторы
Serebrov, A. P.
Ivochkin, V. G.
Samoilov, R. M.
Fomin, A. K.
Zaytsev, M. E.
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Организационные подразделения
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ДИТИ НИЯУ МИФИ
Димитровградский инженерно-технологический институт – филиал федерального государственного автономного образовательного учреждения высшего образования «Национальный исследовательский ядерный университет «МИФИ»
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Аннотация
New results of measurements of the dependences of the flux of reactor antineutrinos and their spectrum on the distance from the center of the core of the SM-3 reactor (Dimitrovgrad, Russia) in the range from 6 to 12m are presented. Additional measurements were conducted. The volume of accumulated experimental data was increased nearly by a factor of two. A model-independent analysis was performed on the basis of all data in order to determine the oscillation parameters Delta m(14)(2) and sin(2) 2 theta(14). Themethod of a coherent summation of measurement results makes it possible to demonstrate directly the oscillation effect. We observed the oscillation effect at a level of three standard deviations (3.0 sigma) in the vicinities of parameters values of Delta m(14)(2) approximate to 7.25 eV(2) and sin(2) 2 theta(14) approximate to 0.26 +/- 008 (3.0)sigma. Combining the results of the Neutrino-4 experiment with results for the gallium anomaly and for the reactor anomaly, we obtained the following value: sin(2) 2 theta(14) approximate to 0.19 +/- 0.04(4.6 sigma).
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New Results of Measurements in the Neutrino-4 Experiment Devoted to Searches for Sterile Neutrinos / Serebrov, AP [et al.] // Physics of Atomic Nuclei. - 2020. - 83. - № 6. - P. 930-936. - 10.1134/S1063778820060265
URI
https://www.doi.org/10.1134/S1063778820060265
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85102006616&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000617283600021
 https://openrepository.mephi.ru/handle/123456789/23144
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