TY - JOUR
T1 - Muon capture on light isotopes measured with the Double Chooz detector
AU - Double Chooz Collaboration
AU - Abe, Y.
AU - Abrahão, T.
AU - Almazan, H.
AU - Alt, C.
AU - Appel, S.
AU - Barriere, J. C.
AU - Baussan, E.
AU - Bekman, I.
AU - Bergevin, M.
AU - Bezerra, T. J.C.
AU - Bezrukov, L.
AU - Blucher, E.
AU - Brugière, T.
AU - Buck, C.
AU - Busenitz, J.
AU - Cabrera, A.
AU - Camilleri, L.
AU - Carr, R.
AU - Cerrada, M.
AU - Chauveau, E.
AU - Chimenti, P.
AU - Collin, A. P.
AU - Conover, E.
AU - Conrad, J. M.
AU - Crespo-Anadón, J. I.
AU - Crum, K.
AU - Cucoanes, A. S.
AU - Damon, E.
AU - Dawson, J. V.
AU - De Kerret, H.
AU - Dhooghe, J.
AU - Dietrich, D.
AU - Djurcic, Z.
AU - Dos Anjos, J. C.
AU - Dracos, M.
AU - Etenko, A.
AU - Fallot, M.
AU - Felde, J.
AU - Fernandes, S. M.
AU - Fischer, V.
AU - Franco, D.
AU - Franke, M.
AU - Furuta, H.
AU - Gil-Botella, I.
AU - Giot, L.
AU - Göger-Neff, M.
AU - Gomez, H.
AU - Gonzalez, L. F.G.
AU - Oberauer, L.
AU - Schönert, S.
N1 - Publisher Copyright:
© 2016 American Physical Society.
PY - 2016/5/12
Y1 - 2016/5/12
N2 - Using the Double Chooz detector, designed to measure the neutrino mixing angle θ13, the products of μ- capture on C12,C13,N14, and O16 have been measured. Over a period of 489.5 days, 2.3×106 stopping cosmic μ- have been collected, of which 1.8×105 captured on carbon, nitrogen, or oxygen nuclei in the inner detector scintillator or acrylic vessels. The resulting isotopes were tagged using prompt neutron emission (when applicable), the subsequent β decays, and, in some cases, β-delayed neutrons. The most precise measurement of the rate of C12(μ-,ν)B12 to date is reported: 6.57-0.21+0.11×103s-1, or (17.35-0.59+0.35)% of nuclear captures. By tagging excited states emitting γs, the ground state transition rate to B12 has been determined to be 5.68-0.23+0.14×103s-1. The heretofore unobserved reactions C12(μ-,να)Li8,C13(μ-,νnα)Li8, and C13(μ-,νn)B12 are measured. Further, a population of βn decays following stopping muons is identified with 5.5σ significance. Statistics limit our ability to identify these decays definitively. Assuming negligible production of He8, the reaction C13(μ-,να)Li9 is found to be present at the 2.7σ level. Limits are set on a variety of other processes.
AB - Using the Double Chooz detector, designed to measure the neutrino mixing angle θ13, the products of μ- capture on C12,C13,N14, and O16 have been measured. Over a period of 489.5 days, 2.3×106 stopping cosmic μ- have been collected, of which 1.8×105 captured on carbon, nitrogen, or oxygen nuclei in the inner detector scintillator or acrylic vessels. The resulting isotopes were tagged using prompt neutron emission (when applicable), the subsequent β decays, and, in some cases, β-delayed neutrons. The most precise measurement of the rate of C12(μ-,ν)B12 to date is reported: 6.57-0.21+0.11×103s-1, or (17.35-0.59+0.35)% of nuclear captures. By tagging excited states emitting γs, the ground state transition rate to B12 has been determined to be 5.68-0.23+0.14×103s-1. The heretofore unobserved reactions C12(μ-,να)Li8,C13(μ-,νnα)Li8, and C13(μ-,νn)B12 are measured. Further, a population of βn decays following stopping muons is identified with 5.5σ significance. Statistics limit our ability to identify these decays definitively. Assuming negligible production of He8, the reaction C13(μ-,να)Li9 is found to be present at the 2.7σ level. Limits are set on a variety of other processes.
UR - http://www.scopus.com/inward/record.url?scp=84969899733&partnerID=8YFLogxK
U2 - 10.1103/PhysRevC.93.054608
DO - 10.1103/PhysRevC.93.054608
M3 - Article
AN - SCOPUS:84969899733
SN - 2469-9985
VL - 93
JO - Physical Review C
JF - Physical Review C
IS - 5
M1 - 054608
ER -