Dr Helen O'Keeffe

Dr Helen O'Keeffe

Lecturer

B74 Physics Building
Lancaster University
Bailrigg
Lancaster
United Kingdom
LA1 4YB

+44 (0)1524 593223

My research focuses on particle physics, in particular measuring properties of the neutrino.  I am a member of the Tokai to Kamioka (T2K) experiment which searches for the appearance of electron neutrinos in a muon neutrino beam. In the experiment, a beam of muon neutrinos is produced at J-PARC in Tokai-mura, Ibaraki, Japan, and its composition is measured 280 m downstream of the production point. The beam is fired 295 km through the Earth to the Super Kamiokande detector, where its properties are also measured. Comparison of the beam measurements at each detector indicates that following their 295 km journey, some of the muon neutrinos have changed type (oscillated) into electron or tau neutrinos. Detailed analysis of the data allows (some of) the parameters associated with the oscillations to be determined.

Within T2K I am co-convener of the pi0 analysis group, which uses data from the near detector to measure pi0 production cross-sections. I also am actively involved with the operation and maintenance of the near detector Data Acquisition (DAQ) systems and electronics.

Selected Publications

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. 2/01/2013 In : Physical Review D. 87, 1, 34 p.012001

Research output: Contribution to journalJournal article

The electromagnetic calorimeter for the T2K near detector ND280

Kormos, L., Bertram, I., Ratoff, P., Bentham, S., Grant, N., Reeves, M., Finch, A., Davies, G., O'Keeffe, H., Hatzikoutelis, A., Maryon, T., Mercer, I. & Reeves, M. 17/10/2013 In : Journal of Instrumentation. 8, 10, 42 p.P10019

Research output: Contribution to journalJournal article

Measurement of neutrino oscillation parameters from muon neutrino disappearance with an off-axis beam

Bentham, S., Bertram, I., Finch, A., Kormos, L., O'Keeffe, H., Ratoff, P., Reeves, M. & Southwell, L. 19/11/2013 In : Physical Review Letters. 111, 21, 7 p.211803

Research output: Contribution to journalJournal article

Low-energy-threshold analysis of the Phase I and Phase II data sets of the Sudbury Neutrino Observatory

O'Keeffe, H. , Kormos, L. & 123 others 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., Burritt, T. H., Cai, B., Chan, Y. D., Chauhan, D., Chen, M., Cleveland, B. T., Cox, G. A., Dai, X., Deng, H., Detwiler, J., DiMarco, M., Doe, P. J., Doucas, G., Drouin, P-L., Duba, C. A., 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., Howe, M. A., Huang, M., Jamieson, B., Jelley, N. A., Keeter, K. J., Klein, J. R., Kormos, L. L., Kos, M., Kraus, C., Krauss, C. B., Kutter, T., Kyba, C. C. M., 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., McCauley, N., McDonald, A. B., McGee, S., Miller, M. L., Monreal, B., Monroe, J., Morissette, B., Nickel, B. G., Noble, A. J., Oblath, N. S., Gann, G. D. O., 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., Sinclair, D., Skensved, P., Sonley, T. J., Stonehill, L. C., Tesic, G., Tolich, N., Tsui, T., Tunnell, C. D., Van Berg, R., VanDevender, B. A., Virtue, C. J., Wall, B. L., Waller, D., Tseung, H. W. C., Wark, D. L., West, N., Wilkerson, J. F., Wilson, J. R., Wouters, J. M., Wright, A., Yeh, M., Zhang, F., Zuber, K. & SNO Collaboration 05/2010 In : Physical Review C. 81, 5, p. - 49 p.055504

Research output: Contribution to journalJournal article

The calibration of the Sudbury Neutrino Observatory using uniformly distributed radioactive sources

O'Keeffe, H. & 32 others Boudjemline, K., Cai, B., Cleveland, B. T., Evans, H. C., Ewan, G. T., Farine, J., Ford, R. J., Guillian, E., Hallin, A. L., Hallman, E. D., Howard, C. V., Jagam, P., Jelley, N. A., Keeter, K. J., Klein, J. R., Kraus, C., Krauss, C. B., Lange, R., Lawson, I. T., Loach, J. C., McDonald, A. B., Mcgregor, G., Noble, A. J., Peeters, S. J. M., Poon, A. W. P., Reitzner, S. D., Rielage, K., Robertson, R. G. H., Rusu, V. L., Seibert, S. R., Skensved, P. & Thomson, M. J. 1/08/2010 In : Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 620, 2-3, p. 171-181 11 p.

Research output: Contribution to journalJournal article

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 journalJournal article

Helen O'Keeffe's Publications

2013

Measurement of neutrino oscillation parameters from muon neutrino disappearance with an off-axis beam

Bentham, S., Bertram, I., Finch, A., Kormos, L., O'Keeffe, H., Ratoff, P., Reeves, M. & Southwell, L. 19/11/2013 In : Physical Review Letters. 111, 21, 7 p.211803

Research output: Contribution to journalJournal article

The electromagnetic calorimeter for the T2K near detector ND280

Kormos, L., Bertram, I., Ratoff, P., Bentham, S., Grant, N., Reeves, M., Finch, A., Davies, G., O'Keeffe, H., Hatzikoutelis, A., Maryon, T., Mercer, I. & Reeves, M. 17/10/2013 In : Journal of Instrumentation. 8, 10, 42 p.P10019

Research output: Contribution to journalJournal article

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. 2/01/2013 In : Physical Review D. 87, 1, 34 p.012001

Research output: Contribution to journalJournal article

2010

The calibration of the Sudbury Neutrino Observatory using uniformly distributed radioactive sources

O'Keeffe, H. & 32 others Boudjemline, K., Cai, B., Cleveland, B. T., Evans, H. C., Ewan, G. T., Farine, J., Ford, R. J., Guillian, E., Hallin, A. L., Hallman, E. D., Howard, C. V., Jagam, P., Jelley, N. A., Keeter, K. J., Klein, J. R., Kraus, C., Krauss, C. B., Lange, R., Lawson, I. T., Loach, J. C., McDonald, A. B., Mcgregor, G., Noble, A. J., Peeters, S. J. M., Poon, A. W. P., Reitzner, S. D., Rielage, K., Robertson, R. G. H., Rusu, V. L., Seibert, S. R., Skensved, P. & Thomson, M. J. 1/08/2010 In : Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 620, 2-3, p. 171-181 11 p.

Research output: Contribution to journalJournal article

Low-energy-threshold analysis of the Phase I and Phase II data sets of the Sudbury Neutrino Observatory

O'Keeffe, H. , Kormos, L. & 123 others 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., Burritt, T. H., Cai, B., Chan, Y. D., Chauhan, D., Chen, M., Cleveland, B. T., Cox, G. A., Dai, X., Deng, H., Detwiler, J., DiMarco, M., Doe, P. J., Doucas, G., Drouin, P-L., Duba, C. A., 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., Howe, M. A., Huang, M., Jamieson, B., Jelley, N. A., Keeter, K. J., Klein, J. R., Kormos, L. L., Kos, M., Kraus, C., Krauss, C. B., Kutter, T., Kyba, C. C. M., 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., McCauley, N., McDonald, A. B., McGee, S., Miller, M. L., Monreal, B., Monroe, J., Morissette, B., Nickel, B. G., Noble, A. J., Oblath, N. S., Gann, G. D. O., 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., Sinclair, D., Skensved, P., Sonley, T. J., Stonehill, L. C., Tesic, G., Tolich, N., Tsui, T., Tunnell, C. D., Van Berg, R., VanDevender, B. A., Virtue, C. J., Wall, B. L., Waller, D., Tseung, H. W. C., Wark, D. L., West, N., Wilkerson, J. F., Wilson, J. R., Wouters, J. M., Wright, A., Yeh, M., Zhang, F., Zuber, K. & SNO Collaboration 05/2010 In : Physical Review C. 81, 5, p. - 49 p.055504

Research output: Contribution to journalJournal article

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 journalJournal article

Current Students

Research students currently supervised by Helen O'Keeffe include: