Search for short baseline $ν_e$ disappearance with the T2K near detector

Abe, K. and Adam, J. and Aihara, H. and Akiri, T. and Andreopoulos, C. and Aoki, S. and Ariga, A. and Assylbekov, S. and Autiero, D. and Barbi, M. and Barker, G. J. and Barr, G. and Bass, M. and Batkiewicz, M. and Bay, F. and Berardi, V. and Berger, B. E. and Berkman, S. and Bhadra, S. and Blaszczyk, F. d. M. and Blondel, A. and Bojechko, C. and Bordoni, S. and Boyd, S. B. and Brailsford, D. and Bravar, A. and Bronner, C. and Buchanan, N. and Calland, R. G. and Rodríguez, J. Caravaca and Cartwright, S. L. and Castillo, R. and Catanesi, M. G. and Cervera, A. and Cherdack, D. and Christodoulou, G. and Clifton, A. and Coleman, J. and Dealtry, Thomas and Finch, A. J. and Grant, N. and Kormos, L. L. and Lamont, I. and Lawe, M. and Nowak, J. and O'Keeffe, H. M. and Ratoff, P. N. and Reeves, M. and Shaw, D. and Southwell, L. (2015) Search for short baseline $ν_e$ disappearance with the T2K near detector. Physical Review D, 91 (5). ISSN 1550-7998

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The T2K experiment has performed a search for $\nu_e$ disappearance due to sterile neutrinos using $5.9 \times 10^{20}$ protons on target for a baseline of $280 m$ in a neutrino beam peaked at about $500 MeV$. A sample of \nu_e CC interactions in the off-axis near detector has been selected with a purity of 63\% and an efficiency of 26\%. The p-value for the null hypothesis is 0.085 and the excluded region at 95\% CL is approximately $sin^2 2 \theta_{ee} > 0.3$ for $\Delta m^2_{eff} > 7 eV^2 / c^4$.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review D
Additional Information:
8 pages, 6 figures, submitted to PRD rapid communication © 2015 American Physical Society
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Deposited On:
18 Jun 2015 05:37
Last Modified:
08 Aug 2020 04:12