论文标题

搜索具有双重动物的无菌中微子的签名

Search for Signatures of Sterile Neutrinos with Double Chooz

论文作者

The Double Chooz Collaboration, Abrahão, T., Almazan, H., Anjos, J. C. dos, Appel, S., Barriere, J. C., Bekman, I., Bezerra, T. J. C., Bezrukov, L., Blucher, E., Brugière, T., Buck, C., Busenitz, J., Cabrera, A., Cerrada, M., Chauveau, E., Chimenti, P., Corpace, O., Dawson, J. V., Djurcic, Z., Etenko, A., Furuta, H., Gil-Botella, I., Givaudan, A., Gomez, H., Gonzalez, L. F. G., Goodman, M. C., Hara, T., Haser, J., Hellwig, D., Hourlier, A., Ishitsuka, M., Jochum, J., Jollet, C., Kale, K., Kaneda, M., Karakac, M., Kawasaki, T., Kemp, E., de Kerret, H., Kryn, D., Kuze, M., Lachenmaier, T., Lane, C. E., Lasserre, T., Lastoria, C., Lhuillier, D., Lima Jr, H. P., Lindner, M., López-Castaño, J. M., LoSecco, J. M., Lubsandorzhiev, B., Maeda, J., Mariani, C., Maricic, J., Martino, J., Matsubara, T., Mention, G., Meregaglia, A., Miletic, T., Milincic, R., Minotti, A., Navas-Nicolás, D., Novella, P., Oberauer, L., Obolensky, M., Onillon, A., Oralbaev, A., Palomares, C., Pepe, I. M., Pronost, G., Reichenbacher, J., Reinhold, B., Schönert, S., Schoppmann, S., Scola, L., Sharankova, R., Sibille, V., Sinev, V., Skorokhvatov, M., Soldin, P., Stahl, A., Stancu, I., Stokes, L. F. F., Suekane, F., Sukhotin, S., Sumiyoshi, T., Sun, Y., Veyssiere, C., Viaud, B., Vivier, M., Wagner, S., Wiebusch, C., Yang, G., Yermia, F.

论文摘要

我们提出了使用双回合实验的其他假设的无菌中微子口味的电子抗中性甲替氏菌中微子混合的特征。该搜索基于从双回合的5年操作中的数据,其中包括两探测器配置中的2年。该分析基于轮廓的可能性,即\将数据与两个相应检测器的数据之间比较中的模型预测进行比较。该分析是针对三个活性和一个无菌中微子的模型进行了优化的。它在典型的质量范围内是敏感的$ 5 \ cdot 10^{ - 3} $ ev $^2 \lyseSimΔm^2_ {41} \ sillesim 3 \ cdot 10^{ - 1} $ ev $^2 $用于混合倾角,以降低到$ \ sin^2 2 2 2θ_{14} {14} {14} \ gtrsim 0.02 $ 0.02 $ 0.02。观察到与$θ_{13} $相关的常规消失,也没有明显的消失,并且在无菌混合参数上相应地排除了$θ_{14} $作为$δm^2_ {41} $的函数。

We present a search for signatures of neutrino mixing of electron anti-neutrinos with additional hypothetical sterile neutrino flavors using the Double Chooz experiment. The search is based on data from 5 years of operation of Double Chooz, including 2 years in the two-detector configuration. The analysis is based on a profile likelihood, i.e.\ comparing the data to the model prediction of disappearance in a data-to-data comparison of the two respective detectors. The analysis is optimized for a model of three active and one sterile neutrino. It is sensitive in the typical mass range $5 \cdot 10^{-3} $ eV$^2 \lesssim Δm^2_{41} \lesssim 3\cdot 10^{-1} $ eV$^2$ for mixing angles down to $\sin^2 2θ_{14} \gtrsim 0.02$. No significant disappearance additionally to the conventional disappearance related to $θ_{13} $ is observed and correspondingly exclusion bounds on the sterile mixing parameter $θ_{14} $ as function of $ Δm^2_{41} $ are obtained.

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