Search for muon-Neutrino to electron-Neutrino transitions in MINOS

P. Adamson, C. Andreopoulos, K. E. Arms, R. Armstrong, D. J. Auty, D. S. Ayres, C. Backhouse, P. D. Barnes, G. Barr, W. L. Barrett, B. R. Becker, A. Belias, R. H. Bernstein, M. Betancourt, D. Bhattacharya, M. Bishai, A. Blake, G. J. Bock, J. Boehm, D. J. BoehnleinD. Bogert, C. Bower, S. Cavanaugh, J. D. Chapman, D. Cherdack, S. Childress, B. C. Choudhary, J. H. Cobb, J. A B Coelho, S. J. Coleman, D. Cronin-Hennessy, A. J. Culling, I. Z. Danko, J. K. De Jong, N. E. Devenish, M. V. Diwan, M. Dorman, A. R. Erwin, C. O. Escobar, J. J. Evans, E. Falk, G. J. Feldman, M. V. Frohne, H. R. Gallagher, A. Godley, M. C. Goodman, P. Gouffon, R. Gran, E. W. Grashorn, K. Grzelak, A. Habig, D. Harris, P. G. Harris, J. Hartnell, R. Hatcher, K. Heller, A. Himmel, A. Holin, C. Howcroft, X. Huang, J. Hylen, G. M. Irwin, Z. Isvan, D. E. Jaffe, C. James, D. Jensen, T. Kafka, S. M S Kasahara, G. Koizumi, S. Kopp, M. Kordosky, D. J. Koskinen, Z. Krahn, A. Kreymer, K. Lang, J. Ling, P. J. Litchfield, R. P. Litchfield, L. Loiacono, P. Lucas, J. Ma, W. A. Mann, M. L. Marshak, J. S. Marshall, N. Mayer, A. M. McGowan, R. Mehdiyev, J. R. Meier, M. D. Messier, C. J. Metelko, D. G. Michael, W. H. Miller, S. R. Mishra, J. Mitchell, C. D. Moore, J. Morfín, L. Mualem, S. Mufson, J. Musser, D. Naples, J. K. Nelson, H. B. Newman, R. J. Nichol, T. C. Nicholls, J. P. Ochoa-Ricoux, W. P. Oliver, R. Ospanov, J. Paley, A. Para, R. B. Patterson, T. Patzak, Ž Pavlović, G. Pawloski, G. F. Pearce, D. A. Petyt, R. Pittam, R. K. Plunkett, A. Rahaman, R. A. Rameika, T. M. Raufer, B. Rebel, J. Reichenbacher, P. A. Rodrigues, C. Rosenfeld, H. A. Rubin, V. A. Ryabov, M. C. Sanchez, N. Saoulidou, J. Schneps, P. Schreiner, P. Shanahan, W. Smart, C. Smith, A. Sousa, B. Speakman, P. Stamoulis, M. Strait, N. Tagg, R. L. Talaga, J. Thomas, M. A. Thomson, J. L. Thron, G. Tinti, R. Toner, V. A. Tsarev, G. Tzanakos, J. Urheim, P. Vahle, B. Viren, D. R. Ward, M. Watabe, A. Weber, R. C. Webb, N. West, C. White, L. Whitehead, S. G. Wojcicki, D. M. Wright, T. Yang, K. Zhang, H. Zheng, M. Zois, R. Zwaska

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This Letter reports on a search for νμ→νe transitions by the MINOS experiment based on a 3.14×1020 protons-on-target exposure in the Fermilab NuMI beam. We observe 35 events in the Far Detector with a background of 27±5(stat)±2(syst) events predicted by the measurements in the Near Detector. If interpreted in terms of νμ→νe oscillations, this 1.5σ excess of events is consistent with sin 2(2θ13) comparable to the CHOOZ limit when |Δm2|=2.43×10-3eV2 and sin 2(2θ23)=1.0 are assumed.

Original languageEnglish (US)
Article number261802
JournalPhysical review letters
Issue number26
StatePublished - 2009

Bibliographical note

Funding Information:
Acknowledgments. We thank Dr. M. Yamada and Dr. A. Takimoto, Department of Biochemistry, Yamaguchi University, for helpful suggestions in constructing the expression plasmids of HEWL. We also thank Dr. Matsubara, Osaka University, for providing the plasmid, PYG-IOO. We are grateful to Dr. K. Yutani, Osaka University, for CD analysis. This work was partly supported by a Grant-in-Aid for Scientific Research (No. 02660143) from the Minister of Education, Science, and Culture of Japan.


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