Improved search for νμ→νe oscillation in a long-baseline accelerator experiment

被引:53
作者
Yamamoto, S [1 ]
Zalipska, J
Aliu, E
Andringa, S
Aoki, S
Argyriades, J
Asakura, K
Ashie, R
Berghaus, F
Berns, H
Bhang, H
Blondel, A
Borghi, S
Bouchez, J
Burguet-Castell, J
Casper, D
Catala, J
Cavata, C
Cervera, A
Chen, SM
Cho, KO
Choi, JH
Dore, U
Espinal, X
Fechner, M
Fernandez, E
Fukuda, Y
Gomez-Cadenas, J
Gran, R
Hara, T
Hasegawa, M
Hasegawa, T
Hayashi, K
Hayato, Y
Helmer, RL
Hiraide, K
Hosaka, J
Ichikawa, AK
Iinuma, M
Ikeda, A
Inagaki, T
Ishida, T
Ishihara, K
Ishii, T
Ishitsuka, M
Itow, Y
Iwashita, T
Jang, HI
Jeon, EJ
Jeong, IS
机构
[1] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan
[2] Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain
[3] Boston Univ, Dept Phys, Boston, MA 02215 USA
[4] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada
[5] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
[6] CEA Saclay, DAPNIA, F-91191 Gif Sur Yvette, France
[7] Chonnam Natl Univ, Dept Phys, Kwangju 500757, South Korea
[8] Dongshin Univ, Dept Phys, Naju 520714, South Korea
[9] Duke Univ, Dept Phys, Durham, NC 27708 USA
[10] Univ Geneva, DPNC, Sect Phys, CH-1211 Geneva 4, Switzerland
[11] Univ Hawaii, Dept Phys & Astron, Honolulu, HI 96822 USA
[12] KEK, High Energy Acceleratoe Res Org, Tsukuba, Ibaraki 3050801, Japan
[13] Hiroshima Univ, Graad Sch Adv Sci Matter, Higashihiroshima, Hiroshima 7398530, Japan
[14] Inst Nucl Res, Moscow 117312, Russia
[15] Kobe Univ, Kobe, Hyogo 6578501, Japan
[16] Korea Univ, Dept Phys, Seoul 136701, South Korea
[17] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA
[18] MIT, Dept Phys, Cambridge, MA 02139 USA
[19] Miyagi Univ Educ, Dept Phys, Sendai, Miyagi 9800845, Japan
[20] Niigata Univ, Dept Phys, Niigata 9502181, Japan
[21] Okayama Univ, Dept Phys, Okayama 7008530, Japan
[22] Osaka Univ, Dept Phys, Osaka 5600043, Japan
[23] Univ Roma La Sapienza, I-00185 Rome, Italy
[24] Ist Nazl Fis Nucl, I-00185 Rome, Italy
[25] Seoul Natl Univ, Dept Phys, Seoul 151747, South Korea
[26] Soltan Inst Nucl Studies, PL-00681 Warsaw, Poland
[27] Tohoku Univ, Res Ctr Neutrino Sci, Sendai, Miyagi 9808578, Japan
[28] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA
[29] Tokyo Univ Sci, Dept Phys, Noda, Chiba 278, Japan
[30] Univ Tokyo, Inst Cosm Ray Res, Kamioka Observ, Gifu 5061205, Japan
[31] Univ Tokyo, Inst Cosm Ray Res, Res Ctr Cosm Neutrinos, Kashiwa, Chiba 2778582, Japan
[32] TRIUMF, Vancouver, BC V6T 2A3, Canada
[33] Inst Fis Corpuscular, E-46071 Valencia, Spain
[34] Univ Washington, Dept Phys, Seattle, WA 98195 USA
[35] Univ Warsaw, Inst Phys Expt, PL-00681 Warsaw, Poland
关键词
D O I
10.1103/PhysRevLett.96.181801
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We performed an improved search for nu(mu)->nu(e) oscillation with the KEK to Kamioka (K2K) long-baseline neutrino oscillation experiment, using the full data sample of 9.2x10(19) protons on target. No evidence for a nu(e) appearance signal was found, and we set bounds on the nu(mu)->nu(e) oscillation parameters. At Delta m(2)=2.8x10(-3) eV(2), the best-fit value of the K2K nu(mu) disappearance analysis, we set an upper limit of sin(2)2 theta(mu e)< 0.13 at a 90% confidence level.
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页数:5
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