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Insertion of STC into TRT at the Department of Physics, Oxford
Credit: CERN

Dr Kirsty Duffy

UKRI Future Leaders Fellow

Research theme

  • Fundamental particles and interactions

Sub department

  • Particle Physics

Research groups

  • Accelerator Neutrinos
kirsty.duffy@physics.ox.ac.uk
Watch Kirsty's Even Bananas video series about neutrino physics
  • About
  • Publications

Search for heavy neutral leptons decaying into muon-pion pairs in the MicroBooNE detector

Physical Review D American Physical Society (APS) 101:5 (2020) 052001

Authors:

P Abratenko, M Alrashed, R An, J Anthony, J Asaadi, A Ashkenazi, S Balasubramanian, B Baller, C Barnes, G Barr, V Basque, S Berkman, A Bhanderi, A Bhat, M Bishai, A Blake, T Bolton, L Camilleri, D Caratelli, I Caro Terrazas, R Castillo Fernandez, F Cavanna, G Cerati, Y Chen, E Church, D Cianci, EO Cohen, JM Conrad, M Convery, L Cooper-Troendle, JI Crespo-Anadón, M Del Tutto, A Devitt, L Domine, K Duffy, S Dytman, B Eberly, A Ereditato, L Escudero Sanchez, JJ Evans, RS Fitzpatrick, BT Fleming, N Foppiani, D Franco, AP Furmanski, D Garcia-Gamez, S Gardiner, V Genty, D Goeldi, S Gollapinni, O Goodwin, E Gramellini, P Green, H Greenlee, L Gu, W Gu, R Guenette, P Guzowski, P Hamilton, O Hen, C Hill, GA Horton-Smith, A Hourlier, E-C Huang, R Itay, C James, J Jan de Vries, X Ji, L Jiang, JH Jo, RA Johnson, J Joshi, Y-J Jwa, G Karagiorgi, W Ketchum, B Kirby, M Kirby, T Kobilarcik, I Kreslo, R LaZur, I Lepetic, Y Li, A Lister, BR Littlejohn, S Lockwitz, D Lorca, WC Louis, M Luethi, B Lundberg, X Luo, A Marchionni, S Marcocci, C Mariani, J Marshall, J Martin-Albo, DA Martinez Caicedo, K Mason, A Mastbaum, N McConkey, V Meddage, T Mettler, K Miller, J Mills, K Mistry, A Mogan, T Mohayai, J Moon, M Mooney, CD Moore, J Mousseau, R Murrells, D Naples, RK Neely, P Nienaber, J Nowak, O Palamara, V Pandey, V Paolone, A Papadopoulou, V Papavassiliou, SF Pate, A Paudel, Z Pavlovic, E Piasetzky, D Porzio, S Prince, G Pulliam, X Qian, JL Raaf, V Radeka, A Rafique, L Ren, L Rochester, HE Rogers, M Ross-Lonergan, C Rudolf von Rohr, B Russell, G Scanavini, DW Schmitz, A Schukraft, W Seligman, MH Shaevitz, R Sharankova, J Sinclair, A Smith, EL Snider, M Soderberg, S Söldner-Rembold, SR Soleti, P Spentzouris, J Spitz, M Stancari, J St. John, T Strauss, K Sutton, S Sword-Fehlberg, AM Szelc, N Tagg, W Tang, K Terao, RT Thornton, M Toups, Y-T Tsai, S Tufanli, MA Uchida, T Usher, W Van De Pontseele, RG Van de Water, B Viren, M Weber, H Wei, DA Wickremasinghe, Z Williams, S Wolbers, T Wongjirad, K Woodruff, M Wospakrik, W Wu, T Yang, G Yarbrough, LE Yates, GP Zeller, J Zennamo, C Zhang
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Reconstruction and measurement of 𝒪(100) MeV energy electromagnetic activity from π0 arrow γγ decays in the MicroBooNE LArTPC

Journal of Instrumentation IOP Publishing 15:02 (2020) p02007-p02007

Authors:

C Adams, M Alrashed, R An, J Anthony, J Asaadi, A Ashkenazi, S Balasubramanian, B Baller, C Barnes, G Barr, V Basque, M Bass, F Bay, S Berkman, A Bhanderi, A Bhat, M Bishai, A Blake, T Bolton, L Camilleri, D Caratelli, I Caro Terrazas, R Carr, R Castillo Fernandez, F Cavanna, G Cerati, Y Chen, E Church, D Cianci, EO Cohen, JM Conrad, M Convery, L Cooper-Troendle, JI Crespo-Anadón, M Del Tutto, D Devitt, A Diaz, L Domine, K Duffy, S Dytman, B Eberly, A Ereditato, L Escudero Sanchez, J Esquivel, JJ Evans, RS Fitzpatrick, BT Fleming, N Foppiani, D Franco, AP Furmanski, D Garcia-Gamez, S Gardiner, V Genty, D Goeldi, S Gollapinni, O Goodwin, E Gramellini, P Green, H Greenlee, R Grosso, L Gu, W Gu, R Guenette, P Guzowski, P Hamilton, O Hen, C Hill, GA Horton-Smith, A Hourlier, E-C Huang, R Itay, C James, J Jan de Vries, X Ji, L Jiang, JH Jo, RA Johnson, J Joshi, Y-J Jwa, G Karagiorgi, W Ketchum, B Kirby, M Kirby, T Kobilarcik, I Kreslo, I Lepetic, Y Li, A Lister, BR Littlejohn, S Lockwitz, D Lorca, WC Louis, M Luethi, B Lundberg, X Luo, A Marchionni, S Marcocci, C Mariani, J Marshall, J Martin-Albo, DA Martinez Caicedo, K Mason, A Mastbaum, N McConkey, V Meddage, T Mettler, K Miller, J Mills, K Mistry, A Mogan, T Mohayai, J Moon, M Mooney, CD Moore, J Mousseau, M Murphy, R Murrells, D Naples, RK Neely, P Nienaber, J Nowak, O Palamara, V Pandey, V Paolone, A Papadopoulou, V Papavassiliou, SF Pate, A Paudel, Z Pavlovic, E Piasetzky, D Porzio, S Prince, G Pulliam, X Qian, JL Raaf, A Rafique, L Ren, L Rochester, HE Rogers, M Ross-Lonergan, C Rudolf von Rohr, B Russell, G Scanavini, DW Schmitz, A Schukraft, W Seligman, MH Shaevitz, R Sharankova, J Sinclair, A Smith, EL Snider, M Soderberg, S Söldner-Rembold, SR Soleti, P Spentzouris, J Spitz, M Stancari, John, T Strauss, K Sutton, S Sword-Fehlberg, AM Szelc, N Tagg, W Tang, K Terao, RT Thornton, M Toups, Y-T Tsai, S Tufanli, T Usher, W Van De Pontseele, RG Van de Water, B Viren, M Weber, H Wei, DA Wickremasinghe, Z Williams, S Wolbers, T Wongjirad, K Woodruff, M Wospakrik, W Wu, T Yang, G Yarbrough, LE Yates, GP Zeller, J Zennamo, C Zhang
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Measurement of the muon neutrino charged-current single π+ production on hydrocarbon using the T2K off-axis near detector ND280

Physical Review D American Physical Society 101:1 (2020) 012007

Authors:

K Abe, R Akutsu, A Ali, C Alt, J Amey, C Andreopoulos, L Anthony, M Antonova, S Aoki, A Ariga, Y Ashida, ET Atkin, Y Awataguchi, Y Azuma, S Ban, M Barbi, GJ Barker, G Barr, C Barry, M Batkiewicz-Kwasniak, A Beloshapkin, F Bench, V Berardi, S Berkman, RM Berner, L Berns, S Bhadra, S Bienstock, A Blondel, S Bolognesi, S Bordoni, B Bourguille, SB Boyd, D Brailsford, A Bravar, C Bronner, MB Avanzini, J Calcutt, RG Calland, T Campbell, S Cao, SL Cartwright, R Castillo, Catanesi, A Cervera, A Chappell, C Checchia, D Cherdack, N Chikuma, G Christodoulou

Abstract:

We report the measurements of single and double differential cross section of muon neutrino charged-current interactions on carbon with a single positively charged pion in the final state at the T2K off-axis near detector using $5.56\times10^{20}$ protons on target. The analysis uses data control samples for the background subtraction and the cross section signal, defined as a single negatively charged muon and a single positively charged pion exiting from the target nucleus, is extracted using an unfolding method. The model dependent cross section, integrated over the T2K off-axis neutrino beam spectrum peaking at $0.6$~GeV, is measured to be $\sigma = (11.76 \pm 0.44 \text{(stat)} \pm 2.39 \text{(syst)}) \times 10^{-40} \text{cm}^2$~$\text{nucleon}^{-1}$. Various differential cross sections are measured, including the first measurement of the Adler angles for single charged pion production in neutrino interactions with heavy nuclei target.
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First measurement of inclusive muon neutrino charged current differential cross sections on argon at Eν∼0.8  GeV with the MicroBooNE detector

Physical Review Letters American Physical Society 123:13 (2019) 131801

Authors:

P Abratenko, C Adams, M Alrashed, R An, J Anthony, J Asaadi, A Ashkenazi, M Auger, S Balasubramanian, B Baller, C Barnes, Giles Barr, M Bass, F Bay, A Bhat, K Bhattacharya, M Bishai, A Blake, T Bolton, L Camilleri, D Caratelli, I Caro Terrazas, R Carr, R Castillo Fernandez, F Cavanna, G Cerati, Y Chen, E Church, D Cianci, EO Cohen, GH Collin, JM Conrad, M Convery, L Cooper-Troendle, JI Crespo-Anadón, Marco Del Tutto, D Devitt, A Diaz, L Domine, K Duffy, S Dytman, B Eberly, A Ereditato, L Escudero Sanchez, J Esquivel, JJ Evans, RS Fitzpatrick, BT Fleming, D Franco, AP Furmanski

Abstract:

We report the first measurement of the double-differential and total muon-neutrino charged-current inclusive cross sections on argon at a mean neutrino energy of 0.8 GeV. Data were collected using the MicroBooNE liquid argon time projection chamber located in the Fermilab Booster neutrino beam, and correspond to $1.6 \times 10^{20}$ protons on target of exposure. The measured differential cross sections are presented as a function of muon momentum, using multiple Coulomb scattering as a momentum measurement technique, and the muon angle with respect to the beam direction. We compare the measured cross sections to multiple neutrino event generators and find better agreement with those containing more complete physics at low $Q^2$. The total flux integrated cross section is measured to be $0.693 \pm 0.010 \, (\text{stat.}) \pm 0.165 \, (\text{syst.}) \times 10^{-38} \, \text{cm}^{2}$.
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Search for heavy neutrinos with the T2K near detector ND280

Physical Review D American Physical Society 100:5 (2019) 052006

Authors:

K Abe, R Akutsu, A Ali, C Andreopoulos, L Anthony, M Antonova, S Aoki, A Ariga, Y Ashida, Y Awataguchi, Y Azuma, S Ban, M Barbi, GJ Barker, Giles Barr, C Barry, M Batkiewicz-Kwasniak, F Bench, V Berardi, S Berkman, RM Berner, L Berns, S Bhadra, S Bienstock, A Blondel, S Bolognesi, B Bourguille, SB Boyd, D Brailsford, A Bravar, C Bronner, MB Avanzini, J Calcutt, T Campbell, S Cao, SL Cartwright, Catanesi, A Cervera, A Chappell, C Checchia, D Cherdack, N Chikuma, G Christodoulou, J Coleman, G Collazuol, D Coplowe, A Cudd, A Dabrowska, GD Rosa, T Dealtry

Abstract:

This paper reports on the search for heavy neutrinos with masses in the range $140 < M_N < 493$ MeV/c$^2$ using the off-axis near detector ND280 of the T2K experiment. These particles can be produced from kaon decays in the standard neutrino beam and then subsequently decay in ND280. The decay modes under consideration are $N \to \ell^{\pm}_{\alpha} \pi^{\mp}$ and $N \to \ell^+_{\alpha} \ell^-_{\beta} \nu (\bar\nu)$ ($\alpha,\beta=e,\mu$). A search for such events has been made using the Time Projection Chambers of ND280, where the background has been reduced to less than two events in the current dataset in all channels. No excess has been observed in the signal region. A combined Bayesian statistical approach has been applied to extract upper limits on the mixing elements of heavy neutrinos to electron-, muon- and tau- flavoured currents ($U_e^2$, $U_{\mu}^2$, $U_{\tau}^2$) as a function of the heavy neutrino mass, e.g. $U_e^2 < 10^{-9}$ at $90\%$ C.L. for a mass of $390$ MeV/c$^2$. These constraints are competitive with previous experiments.
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