arXiv 1206.06452012-06hep-ex

用ANTARES中微子望远镜测量大气中微子振荡

Measurement of Atmospheric Neutrino Oscillations with the ANTARES Neutrino Telescope

ANTARES collaboration, S. Adrian-Martinez, I. Al Samarai, A. Albert, M. Andre, M. Anghinolfi, G. Anton, S. Anvar, M. Ardid, T. Astraatmadja, J. -J. Aubert, B. B… 展开作者

ANTARES collaboration, S. Adrian-Martinez, I. Al Samarai, A. Albert, M. Andre, M. Anghinolfi, G. Anton, S. Anvar, M. Ardid, T. Astraatmadja, J. -J. Aubert, B. Baret, S. Basa, V. Bertin, S. Biagi, C. Bigongiari, C. Bogazzi, M. Bou-Cabo, B. Bouhou, M. C. Bouwhuis, J. Brunner, J. Busto, A. Capone, C. Carloganu, J. Carr, S. Cecchini, Z. Charif, Ph. Charvis, T. Chiarusi, M. Circella, R. Coniglione, L. Core, H. Costantini, P. Coyle, A. Creusot, C. Curtil, G. De Bonis, M. P. Decowski, I. Dekeyser, A. Deschamps, C. Distefano, C. Donzaud, D. Dornic, Q. Dorosti, D. Drouhin, T. Eberl, U. Emanuele, A. Enzenhoefer, J. -P. Ernenwein, S. Escoffier, K. Fehn, P. Fermani, M. Ferri, S. Ferry, V. Flaminio, F. Folger, U. Fritsch, J. -L. Fuda, S. Galata, P. Gay, K. Geyer, G. Giacomelli, V. Giordano, A. Gleixner, J. P. Gomez-Gonzalez, K. Graf, G. Guillard, G. Hallewell, M. Hamal, H. van Haren, A. J. Heijboer, Y. Hello, J. J. Hernandez-Rey, B. Herold, J. Hoessl, C. C. Hsu, M. de Jong, M. Kadler, O. Kalekin, A. Kappes, U. Katz, O. Kavatsyuk, P. Kooijman, C. Kopper, A. Kouchner, I. Kreykenbohm, V. Kulikovskiy, R. Lahmann, G. Lambard, G. Larosa, D. Lattuada, D. Lefevre, G. Lim, D. Lo Presti, H. Loehner, S. Loucatos, F. Louis, S. Mangano, M. Marcelin, A. Margiotta, J. A. Martinez-Mora, A. Meli, T. Montaruli, M. Morganti, L. Moscoso, H. Motz, M. Neff, E. Nezri, D. Palioselitis, G. E. Pavalas, K. Payet, J. Petrovic, P. Piattelli, V. Popa, T. Pradier, E. Presani, C. Racca, C. Reed, G. Riccobene, C. Richardt, R. Richter, C. Riviere, A. Robert, K. Roensch, A. Rostovtsev, J. Ruiz-Rivas, M. Rujoiu, G. V. Russo, D. F. E. Samtleben, A. Sanchez-Losa, P. Sapienza, J. Schmid, J. Schnabel, F. Schoeck, J. -P. Schuller, F. Schuessler, T. Seitz, R. Shanidze, F. Simeone, A. Spies, M. Spurio, J. J. M. Steijger, Th. Stolarczyk, M. Taiuti, C. Tamburini, A. Trovato, B. Vallage, C. Vallee, V. Van Elewyck, M. Vecchi, P. Vernin, E. Visser, S. Wagner, G. Wijnker, J. Wilms, E. de Wolf, H. Yepes, D. Zaborov, J. D. Zornoza, J. Zuniga

备注：: 9 pages, 5 figures
DOI：: 10.1016/j.physletb.2012.07.002

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摘要：

利用ANTARES中微子望远镜2007 - 2010年863天的观测数据，对大气中微子振荡参数进行了测量。μ子轨道重建的能量低至20 GeV。中微子振荡将导致这种能量的垂直上行μ子中微子穿过地球时受到抑制。通过拟合事件率作为估计的中微子能量和重建的通过地球的飞行路径的比率的函数，提取确定大气中微子振荡的参数。测量轮廓的振荡参数在两个味近似推导。假设最大混合，则获得质量差为$Δm_{32}^2=(3.1\pm 0.9)\cdot 10^{-3}$ eV $^2$，与世界平均值非常一致。

英文摘要：

The data taken with the ANTARES neutrino telescope from 2007 to 2010, a total live time of 863 days, are used to measure the oscillation parameters of atmospheric neutrinos. Muon tracks are reconstructed with energies as low as 20 GeV. Neutrino oscillations will cause a suppression of vertical upgoing muon neutrinos of such energies crossing the Earth. The parameters determining the oscillation of atmospheric neutrinos are extracted by fitting the event rate as a function of the ratio of the estimated neutrino energy and reconstructed flight path through the Earth. Measurement contours of the oscillation parameters in a two-flavour approximation are derived. Assuming maximum mixing, a mass difference of $Δm_{32}^2=(3.1\pm 0.9)\cdot 10^{-3}$ eV$^2$ is obtained, in good agreement with the world average value.

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