Dr Thomas Dealtry

Research Associate

Research Interests

My research is focused on experimental neutrino physics. I am interested in measuring neutrino oscillation parameters to high precision, which will lead to knowing why the Universe isn't equal parts matter and anti-matter, in other words, why we exist.

I currently spend most of my time working on the Hyper-K experiment. This is a proposed neutrino and proton decay experiment, due to start taking data in ~2026. In order to access the low-energy physics efficiently, without wasting a lot of storage and computing power on detector noise (expensive!), dedicated low-energy triggers must be designed. I am currently studying using a mix of spatial, temporal, and calorimetric distributions of photo-detector hits to create and assess new triggers.

For my PhD, I worked on the T2K experiment, studying long-baseline neutrino oscillations. T2K produces a beam of neutrinos, predominately of muon neutrino flavour. By measuring the beam at 280 m from the source, uncertainties in the neutrino beam constituants and energy spectrum, and neutrino interaction rates are constrained. Measuring the beam again, at 295 km from the beam source, we see that most of the muon neutrinos have disappeared; some have oscillated into electron neutrinos (which we can see) and others have oscillated into tau neutrinos (invisible in the detector). I measured two parameters that control the muon neutrino disapperance probability, with world-leading precision on θ23.

I am a founding member of the VALOR neutrino fit group, and have, in addition to muon neutrino disappearance at T2K, worked on sensitivity studies for Hyper-K.

I have also worked on the DUNE experiment. DUNE, like Hyper-K, is a proposed neutrino and proton decay experiment due to start taking data in ~2026, complimentary to Hyper-K. The 35-ton detector, a prototype for DUNE, was designed to test a new cryostat design, liquid argon purity, and the detector readout. I worked in the data acquisition group to write the readout software for the GPS clock, external counters and trigger decision unit, and was one of the first scientists to run the detector.

Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of $ν_e$ interactions at the far detector
T2K Collaboration 21/11/2017 In: Physical Review D. 96, 9, 49 p.
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First measurement of the $ν_μ$ charged-current cross section without pions in the final state on a water target
T2K Collaboration 17/11/2017 In: Physical Review D.
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Measurement of the single $π^0$ production rate in neutral current neutrino interactions on water
T2K Collaboration 14/11/2017 In: Physical Review D.
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Measurement of $\barν_μ$ and $ν_μ$ charged current inclusive cross sections and their ratio with the T2K off-axis near detector
T2K Collaboration 1/09/2017 In: Physical Review D. 96, 5, 15 p.
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Updated T2K measurements of muon neutrino and antineutrino disappearance using 1.5 x10 21 protons on target
T2K Collaboration 31/07/2017 In: Physical Review D. 96, 1, 9 p.
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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.
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First combined analysis of neutrino and antineutrino oscillations at T2K
T2K Collaboration 14/04/2017 In: Physical Review Letters. 118, 15, 9 p.
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First measurement of the muon neutrino charged current single pion production cross section on water with the T2K near detector
T2K Collaboration 26/01/2017 In: Physical Review D. 95, 1
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Physics potentials with the second Hyper-Kamiokande Detector in Korea
Hyper-Kamiokande Proto-Collaboration 18/11/2016 In: arxiv.org.
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Measurement of coherent $π^{+}$ production in low energy neutrino-Carbon scattering
T2K Collaboration 4/11/2016 In: Physical Review D. 117, 19, 7 p.
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Proposal for an Extended Run of T2K to $20\times10^{21}$ POT
T2K Collaboration 14/09/2016 In: arxiv.org.
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Sensitivity of the T2K accelerator-based neutrino experiment with an Extended run to 20×1021 POT
T2K Collaboration 27/07/2016 In: arxiv.org.
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TITUS: the Tokai Intermediate Tank for the Unoscillated Spectrum
Andreopoulos, C., Barbato, F.C.T., Barker, G., Barr, G., Beltrame, P., Berardi, V., Berry, T., Blondel, A., Boyd, S., Bravar, A., Cafagna, F.S., Cartwright, S., Catanesi, M.G., Checchia, C., Cole, A., Collazuol, G., Cowan, G.A., Davenne, T., Dealtry, T., Densham, C., Rosa, G.D., Lodovico, F.D., Drakopoulou, E., Dunne, P., Finch, A., Fitton, M., Hadley, D., Hayrapetyan, K., Intonti, R.A., Jonsson, P., Kaboth, A., Katori, T., Kormos, L., Kudenko, Y., Lagoda, J., Laveder, M., Lawe, M., Litchfield, P., Longhin, A., Ludovici, L., Ma, W., Magaletti, L., Malek, M., McCauley, N., Mezzetto, M., Monroe, J., Nicholls, T., Needham, M., Noah, E., Nova, F., O'Keeffe, H.M., Owen, A., Palladino, V., Payne, D., Perkin, J., Playfer, S., Pritchard, A., Prouse, N., Radicioni, E., Rayner, M., Riccio, C., Richards, B., Rose, J., Ruggeri, A.C., Shah, R., Shitov, Y., Simpson, C., Sidiropoulos, G., Stewart, T., Terri, R., Thompson, L., Thorpe, M., Uchida, Y., Wark, D., Wascko, M.O., Weber, A., Wilson, J.R. 27/06/2016 In: arxiv.org.
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Measurement of double-differential muon neutrino charged-current interactions on C8H8 without pions in the final state using the T2K off-axis beam
T2K Collaboration 21/06/2016 In: Physical Review D. 93, 11, 25 p.
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Measurement of muon antineutrino oscillations with an accelerator-produced off-axis beam
T2K Collaboration 5/05/2016 In: Physical Review Letters. 116, 18, 8 p.
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Measurement of the muon neutrino inclusive charged-current cross section in the energy range of 1-3 GeV with the T2K INGRID detector
T2K Collaboration 5/04/2016 In: Physical Review D. 93, 7, 22 p.
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Upper bound on neutrino mass based on T2K neutrino timing measurements
T2K Collaboration, Dealtry, T.J. 27/01/2016 In: Physical Review D. 93, 1, 15 p.
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Measurement of the νμ CCQE cross section on carbon with the ND280 detector at T2K
T2K Collaboration 11/12/2015 In: Physical Review D. 92, 11, 14 p.
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Measurement of the electron neutrino charged-current interaction rate on water with the T2K ND280 pi-zero detector
T2K Collaboration 19/06/2015 In: Physical Review D. 91, 11, 11 p.
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Measurement of the $ν_μ$ charged current quasi-elastic cross-section on carbon with the T2K on-axis neutrino beam
T2K Collaboration 4/06/2015 In: Physical Review D. 91, 11
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Measurements of neutrino oscillation in appearance and disappearance channels by the T2K experiment with 6.6E20 protons on target
T2K Collaboration 29/04/2015 In: Physical Review D. 91, 7, 50 p.
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Neutrino oscillation physics potential of the T2K experiment
T2K Collaboration 1/04/2015 In: Progress of Theoretical and Experimental Physics. 2015, 4, 36 p.
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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.
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Measurement of the inclusive electron neutrino charged current cross section on carbon with the T2K near detector
T2K Collaboration 12/12/2014 In: Physical Review Letters. 113, 24, 7 p.
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Measurement of the neutrino-oxygen neutral-current interaction cross section by observing nuclear deexcitation $γ$ rays
T2K Collaboration 31/10/2014 In: Physical Review D. 90, 7, 11 p.
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Measurement of the inclusive nu(mu) charged current cross section on iron and hydrocarbon in the T2K on-axis neutrino beam
Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Assylbekov, S., Autiero, D., Barbi, M., Barker, G.J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Berardi, V., Berger, B.E., Berkman, S., 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., Rodriguez, J.C., Cartwright, S.L., Castillo, R., Catanesi, M.G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S.J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S.R., Densham, C., Dewhurst, D., Di Lodovico, F., Di Luise, S., Drapier, O., Duboyski, T., Duffy, K., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery-Schrenk, S., Ereditato, A., Escudero, L., Finch, A.J., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A.P., Galymov, V., Giffin, S., Giganti, C., Gilje, K., Goeldi, D., Golan, T., Gonin, 30/09/2014 In: Physical Review D. 90, 5, 15 p.
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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., Bertram, 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., Coleman, S.J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., De Perio, P., De Rosa, G., Dealtry, T., Dennis, S.R., Densham, C., Di Lodovico, F., Di Luise, S., Drapier, O., Duboyski, T., Duffy, K., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery, S., Ereditato, A., Escudero, L., Finch, A.J., Floetotto, L., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A.P., Galymov, V., Giffin, S., Gig 8/05/2014 In: Physical Review Letters. 112, 18, 8 p.
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Measurement of the intrinsic electron neutrino component in the T2K neutrino beam with the ND280 detector
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., Bertram, 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., Coleman, S.J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S.R., Densham, C., Di Lodovico, F., Di Luise, S., Drapier, O., Duboyski, T., Duffy, K., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery, S., Ereditato, A., Escudero, L., Finch, A.J., Floetotto, L., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A.P., Galymov, V., Giffin, S., Gig 5/05/2014 In: Physical Review D. 89, 9, 18 p.
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Observation of electron neutrino appearance in a muon neutrino 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., Bertram, 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., Coleman, S.J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S.R., Densham, C., Di Lodovico, F., Di Luise, S., Drapier, O., Duboyski, T., Duffy, K., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery, S., Ereditato, A., Escudero, L., Finch, A.J., Floetotto, L., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A.P., Galymov, V., Gaudin, A., Gif 10/02/2014 In: Physical Review Letters. 112, 6, 8 p.
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Measurement of neutrino oscillation parameters from muon neutrino disappearance with an off-axis beam
T2K Collaboration, Brailsford, D.B. 19/11/2013 In: Physical Review Letters. 111, 21, 7 p.
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Evidence of electron neutrino appearance in a muon neutrino beam
T2K Collaboration 5/08/2013 In: Physical Review D. 88, 3, 41 p.
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Measurement of the inclusive νμ charged current cross section on carbon in the near detector of the T2K experiment
T2K Collaboration 7/05/2013 In: Physical Review D. 87, 9, 20 p.
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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.
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