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Type: Artigo de periódico
Title: Background-independent Measurement Of θ13 In Double Chooz
Author: Abe Y.
Dos Anjos J.C.
Barriere J.C.
Baussan E.
Bekman I.
Bergevin M.
Bezerra T.J.C.
Bezrukov L.
Blucher E.
Buck C.
Busenitz J.
Cabrera A.
Caden E.
Camilleri L.
Carr R.
Cerrada M.
Chang P.-J.
Chauveau E.
Chimenti P.
Collin A.P.
Conover E.
Conrad J.M.
Crespo-Anadon J.I.
Crum K.
Cucoanes A.
Damon E.
Dawson J.V.
Dietrich D.
Djurcic Z.
Dracos M.
Elnimr M.
Etenko A.
Fallot M.
Von Feilitzsch F.
Felde J.
Fernandes S.M.
Fischer V.
Franco D.
Franke M.
Furuta H.
Gil-Botella I.
Giot L.
Goger-Neff M.
Gonzalez L.F.G.
Goodenough L.
Goodman M.C.
Grant C.
Haag N.
Hara T.
Haser J.
Hofmann M.
Horton-Smith G.A.
Hourlier A.
Ishitsuka M.
Jochum J.
Jollet C.
Kaether F.
Kalousis L.N.
Kamyshkov Y.
Kaplan D.M.
Kawasaki T.
Kemp E.
De Kerret H.
Konno T.
Kryn D.
Kuze M.
Lachenmaier T.
Lane C.E.
Lasserre T.
Letourneau A.
Lhuillier D.
Lima H.P.
Lindner M.
Lopez-Castano J.M.
LoSecco J.M.
Lubsandorzhiev B.K.
Lucht S.
Maeda J.
Mariani C.
Maricic J.
Martino J.
Matsubara T.
Mention G.
Meregaglia A.
Miletic T.
Milincic R.
Minotti A.
Nagasaka Y.
Nakajima K.
Nikitenko Y.
Novella P.
Obolensky M.
Oberauer L.
Onillon A.
Osborn A.
Palomares C.
Pepe I.M.
Perasso S.
Pfahler P.
Porta A.
Pronost G.
Reichenbacher J.
Reinhold B.
Rohling M.
Roncin R.
Roth S.
Rybolt B.
Sakamoto Y.
Santorelli R.
Sato F.
Schilithz A.C.
Schonert S.
Schoppmann S.
Shaevitz M.H.
Sharankova R.
Shimojima S.
Sibille V.
Sinev V.
Skorokhvatov M.
Smith E.
Spitz J.
Stahl A.
Stancu I.
Stokes L.F.F.
Strait M.
Stuken A.
Suekane F.
Sukhotin S.
Sumiyoshi T.
Sun Y.
Svoboda R.
Terao K.
Tonazzo A.
Trinh Thi H.H.
Valdiviesso G.
Vassilopoulos N.
Veyssiere C.
Vivier M.
Wagner S.
Watanabe H.
Wiebusch C.
Winslow L.
Wurm M.
Yang G.
Yermia F.
Zimmer V.
Abstract: The oscillation results published by the Double Chooz Collaboration in 2011 and 2012 rely on background models substantiated by reactor-on data. In this analysis, we present a background-model-independent measurement of the mixing angle θ13 by including 7.53 days of reactor-off data. A global fit of the observed antineutrino rates for different reactor power conditions is performed, yielding a measurement of both θ13 and the total background rate. The results on the mixing angle are improved significantly by including the reactor-off data in the fit, as it provides a direct measurement of the total background rate. This reactor rate modulation analysis considers antineutrino candidates with neutron captures on both Gd and H, whose combination yields sin2(2θ13) = 0.102 ± 0.028(stat.) ± 0.033(syst.). The results presented in this study are fully consistent with the ones already published by Double Chooz, achieving a competitive precision. They provide, for the first time, a determination of θ13 that does not depend on a background model. © 2014 The Authors.
Editor: Elsevier
Citation: Physics Letters, Section B: Nuclear, Elementary Particle And High-energy Physics. Elsevier, v. 735, n. , p. 51 - 56, 2014.
Rights: aberto
Identifier DOI: 10.1016/j.physletb.2014.04.045
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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