{"paper":{"title":"New limits on heavy sterile neutrino mixing in ${^{8}\\rm{B}}$-decay obtained with the Borexino detector","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph","nucl-ex"],"primary_cat":"hep-ex","authors_text":"A. Chavarria, A. Chepurnov, A. Derbin, A. Empl, A. Etenko, A. Goretti, Aldo Ianni, Andrea Ianni, A. Pocar, A. Razeto, A. Re, A. Romani, A. Sotnikov, A. Wright, B. Caccianiga, B. Loer, Borexino collaboration, C. Galbiati, C. Ghiano, C. Hagner, C. Salvo, D. Bick, D. Bravo, D. DAngelo, D. Franco, D. Korablev, D. Kryn, D. Vignaud, E. Hungerford, E. Litvinovich, E. Meroni, F. Calaprice, F. Lombardi, F. Ortica, F. von Feilitzsch, G. Bellini, G. Bonfini, G. Korga, G. Lukyanchenko, G. Manuzio, G. Ranucci, G. Testera, G. Zuzel, H. Simgen, I. Drachnev, I. Machulin, J. Benziger, J. Winter, J. Xu, K. Fomenko, K. Otis, L. Cadonati, L. Grandi, L. Ludhova, L. Miramonti, L. Oberauer, L. Papp, L. Perasso, M. Buizza Avanzini, M. Giammarchi, M. Goger-Neff, M. Laubenstein, M. Misiaszek, M. Obolensky, M. Pallavicini, M. Skorokhvatov, M. Wojcik, M. Wurm, N. Rossi, O. Smirnov, O. Zaimidoroga, P. Cavalcante, P. Lombardi, P. Mosteiro, Q. Meindl, R.B. Vogelaar, R. Saldanha, R. Tartaglia, S. Davini, S. Gazzana, S. Manecki, S. Perasso, S. Schonert, S. Sukhotin, S. Zavatarelli, T. Lewke, V. Kobychev, V. Muratova, W. Maneschg, Y. Suvorov","submitted_at":"2013-11-21T09:51:17Z","abstract_excerpt":"If heavy neutrinos with mass $m_{\\nu_{H}}\\geq$2$ m_e $ are produced in the Sun via the decay ${^8\\rm{B}} \\rightarrow {^8\\rm{Be}} + e^+ + \\nu_H$ in a side branch of pp-chain, they would undergo the observable decay into an electron, a positron and a light neutrino $\\nu_{H}\\rightarrow\\nu_{L}+e^++e^-$. In the present work Borexino data are used to set a bound on the existence of such decays. We constrain the mixing of a heavy neutrino with mass 1.5 MeV $\\leq m_{\\nu_{H}} \\le$ 14 MeV to be $|U_{eH}|^2\\leq (10^{-3}-4\\times10^{-6})$ respectively. These are tighter limits on the mixing parameters than"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.5347","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}