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Constraining visible neutrino decay at KamLAND and JUNO

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dc.contributor.authorPorto-Silva, Yago P.en
dc.contributor.authorPrakash, Suprabhen
dc.contributor.authorPeres, O. L. G.en
dc.contributor.authorNunokawa, Hiroshien
dc.contributor.authorMinakata, Hisakazuen
dc.contributor.departmentCenter for Neutrino Physicsen
dc.contributor.departmentPhysicsen
dc.date.accessioned2021-01-27T15:31:04Zen
dc.date.available2021-01-27T15:31:04Zen
dc.date.issued2020-10-29en
dc.description.abstractWe study visible neutrino decay at the reactor neutrino experiments KamLAND and, JUNO. Assuming the Majoron model of neutrino decay, we obtain constraints on the couplings between Majoron and neutrino as well as on the lifetime/mass of the most massive neutrino state i.e., tau(3)/m(3) or tau(2)/m(2), respectively, for the normal or the inverted mass orderings. We obtain the constraints on the lifetime tau(2)/m(2)>= 1.4x10(-9) s/eV in the inverted mass ordering for both KamLAND and JUNO at 90% CL. In the normal ordering in which the bound can be obtained for JUNO only, the constraint is milder than the inverted ordering case, tau(3)/m(3) >= 1.0 x 10(-1)0 s/eV at 90% CL. We find that the dependence of lightest neutrino mass (= m(lightest)), m(1)(m(3)) for the normal (inverted) mass ordering, on the constraints for the different types of couplings (scalar or pseudo-scalar) is rather strong, but the m(lightest) dependence on the lifetime/mass bound is only modest.en
dc.description.notesSP, YPPS, and OLGP are thankful for the support of FAPESP funding Grant no. 2014/19164-6. OLGP was supported by FAPESP funding Grant 2016/08308-2, FAEPEX funding Grant 2391/2017 and 2541/2019, CNPq Grants 304715/2016-6 and 306565/2019-6. YPPS is thankful for the support of FAPESP funding Grant no. 2017/05515-0 and 2019/22961-9. SP is thankful for the support of FAPESP funding Grant no. 2017/02361-1. This study was financed in part by the Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) - Finance Code 001. During this work, HM had been visiting Instituto de Fisica Gleb Wataghin, Universidade Estadual de Campinas in Brazil, Departamento de Fisica, Pontificia Universidade Catolica do Rio de Janeiro in Brazil, Instituto Fisica Teorica, UAM/CSIC in Madrid, Research Center for Cosmic Neutrinos, Institute for Cosmic Ray Research, University of Tokyo, before reaching Center for Neutrino Physics, Virginia Tech. He expresses deep gratitude to all of them for their hospitalities and supports. HN thanks the hospitality of the Fermilab Theoretical Department where the final part of this work was done.en
dc.description.sponsorshipFAPESPFundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2017/02361-1, 2014/19164-6, 2016/08308-2, 2017/05515-0, 2019/22961-9]; FAEPEX [2391/2017, 2541/2019]; CNPqNational Council for Scientific and Technological Development (CNPq) [304715/2016-6, 306565/2019-6]; Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES)CAPES [001]en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1140/epjc/s10052-020-08573-9en
dc.identifier.eissn1434-6052en
dc.identifier.issn1434-6044en
dc.identifier.issue10en
dc.identifier.other999en
dc.identifier.urihttp://hdl.handle.net/10919/102104en
dc.identifier.volume80en
dc.language.isoenen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.titleConstraining visible neutrino decay at KamLAND and JUNOen
dc.title.serialEuropean Physical Journal Cen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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