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Professor Helen O'Keeffe FHEA

Professor of Particle Physics

  1. Published

    Precise Measurement of the Neutrino Mixing Parameter θ_{23} from Muon Neutrino Disappearance in an Off-axis Beam

    Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Barbi, M., Barker, G. J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S. W., Berardi, V., Berger, B. E., Berkman, S., & 31 othersBertram, I., Bhadra, S., Blaszczyk, F. D. M., Blondel, A., Bojechko, C., Bordoni, S., Boyd, S. B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R. G., Caravaca Rodriguez, J., Cartwright, S. L., Castillo, R., Catanesi, M. G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Dealtry, T., Finch, A. J., Grant, N., Kormos, L. L., Lamont, I., O'Keeffe, H. M., Ratoff, P. N., Reeves, M., Southwell, L. & T2K Collaboration, 8/05/2014, In: Physical review letters. 112, 18, 8 p., 181801.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  2. Published

    Proposal for an Extended Run of T2K to $20\times10^{21}$ POT

    T2K Collaboration, 14/09/2016, In: arxiv.org.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  3. Published

    Recent T2K neutrino oscillation results

    O’Keeffe, H. M. & T2K Collaboration, 17/12/2019, In: Proceedings of Science. 367, 5 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  4. Published

    Reconstruction of neutrino induced NC-1π0 using the T2K-ND280 tracker

    O'Keeffe, H. M., Vacheret, A., Barr, G. D., Jacob, A., Weber, A. & Williamson, Z., 15/05/2015, In: AIP Conference Proceedings. 1663, 1, 120016.

    Research output: Contribution to Journal/MagazineJournal article

  5. Published

    Scintillation decay time and pulse shape discrimination in oxygenated and deoxygenated solutions of linear alkylbenzene for the SNO+ experiment

    O'Keeffe, H., O’Sullivan, E. & Chen, M. C., 1/06/2011, In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 640, 1, p. 119-122 4 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  6. Published
  7. Published

    Scintillator ageing of the T2K near detectors from 2010 to 2021

    The T2K Collaboration, 17/10/2022, In: Journal of Instrumentation. 17, 10, 35 p., P10028.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  8. Published

    Search for CP violation in Neutrino and Antineutrino Oscillations by the T2K experiment with $2.2\times10^{21}$ protons on target

    Brailsford, D., Dealtry, T., Finch, A. J., Knox, A., Kormos, L. L., Lawe, M., Nowak, J., O'Keeffe, H. M., Ratoff, P. N. & T2K Collaboration, 24/10/2018, In: Physical review letters. 121, 17, 9 p., 171802.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  9. Published

    Search for Electron Antineutrino Appearance in a Long-baseline Muon Antineutrino Beam

    T2K Collaboration, Brailsford, D., Dealtry, T., Doyle, T. A., Finch, A. J., Knox, A., Kormos, L. L., Lawe, M., Nowak, J., O'Keeffe, H. M., Ratoff, P. N. & Walsh, J. G., 21/04/2020, In: Physical review letters. 124, 8 p., 161802.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  10. Published

    Search for heavy neutrinos with the T2K near detector ND280

    T2K Collaboration, Brailsford, D., Dealtry, T., Finch, A. J., Knox, A., Kormos, L. L., Lawe, M., Nowak, J., O'Keeffe, H. M., Ratoff, P. N. & Shaw, D., 10/09/2019, In: Physical Review D. 100, 5, 10 p., 052006.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  11. Published

    Search for invisible modes of nucleon decay in water with the SNO+ detector

    SNO+ Collaboration, 1/02/2019, In: Physical Review D. 99, 3, 13 p., 032008.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  12. Published

    Search for light sterile neutrinos with the T2K far detector Super-Kamiokande at a baseline of 295 km

    T2K Collaboration, Brailsford, D., Dealtry, T., Finch, A. J., Knox, A., Kormos, L. L., Lawe, M., Nowak, J., O'Keeffe, H. M., Ratoff, P. N. & Shaw, D., 1/04/2019, In: Physical Review D. 99, 7, 10 p., 071103.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  13. Published

    Search for Lorentz and CPT violation using sidereal time dependence of neutrino flavor transitions over a short baseline

    T2K Collaboration, 29/06/2017, In: Physical Review D.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  14. Published

    Search for neutral-current induced single photon production at the ND280 near detector in T2K

    T2K Collaboration, Brailsford, D., Dealtry, T., Finch, A. J., Knox, A., Kormos, L. L., Lawe, M., Nowak, J., O'Keeffe, H. M., Ratoff, P. N. & Shaw, D., 1/08/2019, In: Journal of Physics G: Nuclear and Particle Physics. 46, 8, 16 p., 08LT01.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  15. Published

    Search for neutron-Antineutron oscillations at the Sudbury Neutrino Observatory

    Aharmim, B., Ahmed, S. N., Anthony, A. E., Barros, N., Beier, E. W., Bellerive, A., Beltran, B., Bergevin, M., Biller, S. D., Boudjemline, K., Boulay, M. G., Cai, B., Chan, Y. D., Chauhan, D., Chen, M., Cleveland, B. T., Cox, G. A., Dai, X., Deng, H., Detwiler, J. A., & 104 othersDoe, P. J., Doucas, G., Drouin, P. L., Duncan, F. A., Dunford, M., Earle, E. D., Elliott, S. R., Evans, H. C., Ewan, G. T., Farine, J., Fergani, H., Fleurot, F., Ford, R. J., Formaggio, J. A., Gagnon, N., Goon, J. T., Graham, K., Guillian, E., Habib, S., Hahn, R. L., Hallin, A. L., Hallman, E. D., Harvey, P. J., Hazama, R., Heintzelman, W. J., Heise, J., Helmer, R. L., Hime, A., Howard, C., Huang, M., Jagam, P., Jamieson, B., Jelley, N. A., Jerkins, M., Keeter, K. J., Klein, J. R., Kormos, L. L., Kos, M., Krüger, A., Kraus, C., Krauss, C. B., Kutter, T., Kyba, C. C. M., Lange, R., Law, J., Lawson, I. T., Lesko, K. T., Leslie, J. R., Levine, I., Loach, J. C., Maclellan, R., Majerus, S., Mak, H. B., Maneira, J., Martin, R. D., McCauley, N., McDonald, A. B., McGee, S. R., Miller, M. L., Monreal, B., Monroe, J., Nickel, B. G., Noble, A. J., O'Keeffe, H. M., Oblath, N. S., Okada, C. E., Ollerhead, R. W., Orebi Gann, G. D., Oser, S. M., Ott, R. A., Peeters, S. J. M., Poon, A. W. P., Prior, G., Reitzner, S. D., Rielage, K., Robertson, B. C., Robertson, R. G. H., Schwendener, M. H., Secrest, J. A., Seibert, S. R., Simard, O., Simpson, J. J., Sinclair, D., Skensved, P., Sonley, T. J., Stonehill, L. C., Tešić, G., Tolich, N., Tsui, T., Van Berg, R., Vandevender, B. A., Virtue, C. J., Wall, B. L., Waller, D., Wan Chan Tseung, H., Wark, D. L., Wendland, J., West, N., Wilkerson, J. F., Wilson, J. R., Wright, A., Yeh, M., Zhang, F. & Zuber, K., 20/11/2017, In: Physical Review D. 96, 9, 15 p., 092005.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  16. Published

    Search for periodicities in the B8 solar neutrino flux measured by the Sudbury Neutrino Observatory

    SNO Collaboration, 30/09/2005, In: Physical Review D. 72, 5, 8 p., 052010.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  17. Published

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

    T2K Collaboration, 16/03/2015, In: Physical Review D. 91, 5, 8 p., 051102.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  18. Published

    Searches for high-frequency variations in the 8B solar neutrino flux at the Sudbury Neutrino Observatory

    Kormos, L. & O'Keeffe, H., 02/2010, In: The Astrophysical Journal. 710, 1, p. 540-548 9 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  19. Published

    Sensitivity of the T2K accelerator-based neutrino experiment with an Extended run to 20×1021 POT

    T2K Collaboration, 27/07/2016, In: arxiv.org.

    Research output: Contribution to Journal/MagazineJournal article

  20. Published

    Simultaneous measurement of the muon neutrino charged-current cross section on oxygen and carbon without pions in the final state at T2K

    T2K Collaboration, Dealtry, T., Finch, A. J., Kormos, L. L., Lawe, M., Nowak, J., O'Keeffe, H. M., Ratoff, P. N., Walsh, J. G. & Doyle, T., 16/06/2020, In: Physical Review D. 101, 11, 32 p., 112004.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  21. Published

    Supernova Model Discrimination with Hyper-Kamiokande

    Hyper-Kamiokande Collaboration, Dealtry, T., Doyle, T. A., Finch, A., Kormos, L. L., James, M. L., Lawe, M. & O'Keeffe, H. M., 20/07/2021, In: The Astrophysical Journal. 916, 1, 17 p., 15.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  22. Published

    T2K measurements of muon neutrino and antineutrino disappearance using $3.13\times 10^{21}$ protons on target

    T2K Collaboration, Dealtry, T., Doyle, T. A., Finch, A. J., Kormos, L. L., Nowak, J., O'Keeffe, H. M., Ratoff, P. N. & Walsh, J. G., 1/01/2021, In: Physical Review D. 103, 1, 9 p., L011101.

    Research output: Contribution to Journal/MagazineLetterpeer-review

  23. Published

    T2K ND280 Upgrade - Technical Design Report

    T2K Collaboration, Brailsford, D., Dealtry, T., Finch, A. J., Knox, A., Kormos, L. L., Lamont, I., Lawe, M., Nowak, J., O'Keeffe, H. M., Ratoff, P. N., Shaw, D. & Southwell, L., 11/01/2019, In: arXiv.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  24. Published

    T2K ND280 Upgrade - Technical Design Report

    T2K Collaboration, 14/10/2020, In: arxiv.org. 196 p.

    Research output: Contribution to Journal/MagazineJournal article

  25. Published

    T2K neutrino flux prediction

    T2K Collaboration, Finch, A., Kormos, L., Bertram, I., Ratoff, P., Bentham, S., Reeves, M., Grant, N., Southwell, L., O'Keeffe, H. & Dealtry, T. J., 2/01/2013, In: Physical Review D. 87, 1, 34 p., 012001.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

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