利用超级神冈探测器一期1496天的太阳中微子数据对中微子磁矩的限制。

Limits on the neutrino magnetic moment using 1496 days of Super-Kamiokande-I solar neutrino data.

作者信息

Liu D W, Ashie Y, Fukuda S, Fukuda Y, Ishihara K, Itow Y, Koshio Y, Minamino A, Miura M, Moriyama S, Nakahata M, Namba T, Nambu R, Obayashi Y, Sakurai N, Shiozawa M, Suzuki Y, Takeuchi H, Takeuchi Y, Yamada S, Ishitsuka M, Kajita T, Kaneyuki K, Nakayama S, Okada A, Ooyabu T, Saji C, Desai S, Earl M, Kearns E, Messier M D, Stone J L, Sulak L R, Walter C W, Wang W, Barszczak T, Casper D, Cravens J P, Gajewski W, Kropp W R, Mine S, Smy M B, Sobel H W, Sterner C W, Vagins M R, Ganezer K S, Hill J, Keig W E, Kim J Y, Lim I T, Ellsworth R W, Tasaka S, Kibayashi A, Learned J G, Matsuno S, Takemori D, Hayato Y, Ichikawa A K, Ishida T, Ishii T, Iwashita T, Kameda J, Kobayashi T, Maruyama T, Nakamura K, Nitta K, Oyama Y, Sakuda M, Totsuka Y, Suzuki A T, Hasegawa M, Hayashi K, Inagaki T, Kato I, Maesaka H, Morita T, Nakaya T, Nishikawa K, Sasaki T, Ueda S, Yamamoto S, Haines T J, Dazeley S, Hatakeyama S, Svoboda R, Blaufuss E, Goodman J A, Guillian G, Sullivan G W, Turcan D, Scholberg K, Habig A, Ackermann M, Jung C K, Kato T, Kobayashi K, Martens K, Malek M, Mauger C, McGrew C, Sharkey E, Viren B, Yanagisawa C, Toshito T, Mitsuda C, Miyano K, Shibata T, Ishii J, Kajiyama Y, Kuno Y, Nagashima Y, Takita M, Yoshida M, Kim H I, Kim S B, Yoo J, Okazawa H, Ishizuka T, Choi Y, Seo H K, Gando Y, Hasegawa T, Inoue K, Shirai J, Suzuki A, Koshiba M, Hashimoto T, Nakajima Y, Nishijima K, Ishino H, Morii M, Nishimura R, Watanabe Y, Kielczewska D, Zalipska J, Gran R, Shiraishi K K, Washburn K, Wilkes R J

机构信息

Department of Physics and Astronomy, University of California, Irvine, Irvine, California 92697-4575, USA.

出版信息

Phys Rev Lett. 2004 Jul 9;93(2):021802. doi: 10.1103/PhysRevLett.93.021802. Epub 2004 Jul 6.

DOI:10.1103/PhysRevLett.93.021802

PMID:15323899

Abstract

A search for a nonzero neutrino magnetic moment has been conducted using 1496 live days of solar neutrino data from Super-Kamiokande-I. Specifically, we searched for distortions to the energy spectrum of recoil electrons arising from magnetic scattering due to a nonzero neutrino magnetic moment. In the absence of a clear signal, we found micro(nu)</=(3.6x10(-10))micro(B) at 90% C.L. by fitting to the Super-Kamiokande day-night spectra. The fitting took into account the effect of neutrino oscillation on the shapes of energy spectra. With additional information from other solar neutrino and KamLAND experiments constraining the oscillation region, a limit of micro(nu)</=(1.1x10(-10))micro(B) at 90% C.L. was obtained.

摘要

利用超级神冈探测器一期的1496个有效天的太阳中微子数据，开展了对非零中微子磁矩的搜索。具体而言，我们搜索了因非零中微子磁矩导致的磁散射而产生的反冲电子能谱畸变。在未发现明确信号的情况下，通过对超级神冈探测器日-夜能谱进行拟合，我们在90%置信水平下发现微中子磁矩小于等于（3.6×10⁻¹⁰）玻尔磁子。拟合过程考虑了中微子振荡对能谱形状的影响。结合来自其他太阳中微子和KamLAND实验的额外信息对振荡区域进行限制，在90%置信水平下得到了微中子磁矩小于等于（1.1×10⁻¹⁰）玻尔磁子的限制。