Skip to main content
Home
Department Of Physics text logo
  • Research
    • Our research
    • Our research groups
    • Our research in action
    • Research funding support
    • Summer internships for undergraduates
  • Study
    • Undergraduates
    • Postgraduates
  • Engage
    • For alumni
    • For business
    • For schools
    • For the public
Menu
Insertion of STC into TRT at the Department of Physics, Oxford
Credit: CERN

Giles Barr

Professor of Physics

Sub department

  • Particle Physics

Research groups

  • Accelerator Neutrinos
Giles.Barr@physics.ox.ac.uk
Telephone: 01865 (2)73446
Denys Wilkinson Building, room 664a
  • About
  • Publications

Novel approach for evaluating detector-related uncertainties in a LArTPC using MicroBooNE data

European Physical Journal C Springer 82:5 (2022) 454

Authors:

P Abratenko, R An, J Anthony, G Barr, K Duffy, W Van De Pontseele

Abstract:

Primary challenges for current and future precision neutrino experiments using liquid argon time projection chambers (LArTPCs) include understanding detector effects and quantifying the associated systematic uncertainties. This paper presents a novel technique for assessing and propagating LArTPC detector-related systematic uncertainties. The technique makes modifications to simulation waveforms based on a parameterization of observed differences in ionization signals from the TPC between data and simulation, while remaining insensitive to the details of the detector model. The modifications are then used to quantify the systematic differences in low- and high-level reconstructed quantities. This approach could be applied to future LArTPC detectors, such as those used in SBN and DUNE.
More details from the publisher
Details from ORA
More details

New CC 0π GENIE model tune for MicroBooNE

Physical Review D American Physical Society 105:7 (2022) 072001

Authors:

P Abratenko, An, Anthony, Giles Barr, Kirsty Duffy

Abstract:

Obtaining a high-quality interaction model with associated uncertainties is essential for neutrino experiments studying oscillations, nuclear scattering processes, or both. As a primary input to the MicroBooNE experiment’s next generation of neutrino cross section measurements and its flagship investigation of the MiniBooNE low-energy excess, we present a new tune of the charged-current pionless (CC0π) interaction cross section via the two major contributing processes—charged-current quasielastic and multinucleon interaction models—within version 3.0.6 of the GENIE neutrino event generator. Parameters in these models are tuned to muon neutrino CC0π cross section data obtained by the T2K experiment, which provides an independent set of neutrino interactions with a neutrino flux in a similar energy range to MicroBooNE’s neutrino beam. Although the fit is to muon neutrino data, the information carries over to electron neutrino simulation because the same underlying models are used in GENIE. A number of novel fit parameters were developed for this work, and the optimal parameters were chosen from existing and new sets. We choose to fit four parameters that have not previously been constrained by theory or data. Thus, this will be called a theory-driven tune. The result is an improved match to the T2K CC0π data with more well-motivated uncertainties based on the fit.
More details from the publisher
Details from ORA
More details

Electromagnetic shower reconstruction and energy validation with Michel electrons and π0 samples for the deep-learning-based analyses in MicroBooNE

Journal of Instrumentation IOP Publishing 16 (2021) T12017

Authors:

P Abratenko, R An, J Anthony, Giles Barr, Kirsty Duffy, N Tagg, W Van De Pontseele

Abstract:

This article presents the reconstruction of the electromagnetic activity from electrons and photons (showers) used in the MicroBooNE deep learning-based low energy electron search. The reconstruction algorithm uses a combination of traditional and deep learning-based techniques to estimate shower energies. We validate these predictions using two νμ-sourced data samples: charged/neutral current interactions with final state neutral pions and charged current interactions in which the muon stops and decays within the detector producing a Michel electron. Both the neutral pion sample and Michel electron sample demonstrate agreement between data and simulation. Further, the absolute shower energy scale is shown to be consistent with the relevant physical constant of each sample: the neutral pion mass peak and the Michel energy cutoff.
More details from the publisher
Details from ORA
More details

Search for a Higgs portal scalar decaying to electron-positron pairs in the MicroBooNE detector

Physical Review Letters American Physical Society 127:15 (2021) 151803

Authors:

P Abratenko, R An, J Anthony, J Asaadi, A Ashkenazi, S Balasubramanian, B Baller, C Barnes, Giles Barr, V Basque, L Bathe-Peters, O Benevides Rodrigues, S Berkman, A Bhanderi, A Bhat, M Bishai, A Blake, T Bolton, Jy Book, L Camilleri, D Caratelli, I Caro Terrazas, R Castillo Fernandez, F Cavanna, G Cerati

Abstract:

We present a search for the decays of a neutral scalar boson produced by kaons decaying at rest, in the context of the Higgs portal model, using the MicroBooNE detector. We analyze data triggered in time with the Fermilab NuMI neutrino beam spill, with an exposure of 1.93×10^{20} protons on target. We look for monoenergetic scalars that come from the direction of the NuMI hadron absorber, at a distance of 100 m from the detector, and decay to electron-positron pairs. We observe one candidate event, with a standard model background prediction of 1.9±0.8. We set an upper limit on the scalar-Higgs mixing angle of θ<(3.3-4.6)×10^{-4} at the 95% confidence level for scalar boson masses in the range (100-200)  MeV/c^{2}. We exclude, at the 95% confidence level, the remaining model parameters required to explain the central value of a possible excess of K_{L}^{0}→π^{0}νν[over ¯] decays reported by the KOTO collaboration. We also provide a model-independent limit on a new boson X produced in K→πX decays and decaying to e^{+}e^{-}.
More details from the publisher
Details from ORA
More details
More details

Improved constraints on neutrino mixing from the T2K experiment with 3.13 x 10(21) protons on target

PHYSICAL REVIEW D 103:11 (2021) ARTN 112008

Authors:

K Abe, N Akhlaq, R Akutsu, A Ali, C Alt, C Andreopoulos, M Antonova, S Aoki, T Arihara, Y Asada, Y Ashida, ET Atkin, Y Awataguchi, GJ Barker, G Barr, D Barrow, M Batkiewicz-Kwasniak, A Beloshapkin, F Bench, V Berardi, L Berns, S Bhadra, A Blanchet, A Blondel, S Bolognesi, T Bonus, B Bourguille, SB Boyd, A Bravar, D Bravo Berguno, C Bronner, S Bron, A Bubak, M Buizza Avanzini, S Cao, SL Cartwright, MG Catanesi, A Cervera, J Chakrani, D Cherdack, G Christodoulou, M Cicerchia, J Coleman, G Collazuol, L Cook, D Coplowe, A Cudd, G De Rosa, T Dealtry, CC Delogu, SR Dennis, C Densham, A Dergacheva, F Di Lodovico, S Dolan, D Douqa, TA Doyle, J Dumarchez, P Dunne, A Eguchi, L Eklund, S Emery-Schrenk, A Ereditato, AJ Finch, G Fiorillo, C Francois, M Friend, Y Fujii, R Fukuda, Y Fukuda, K Fusshoeller, C Giganti, M Gonin, EAG Goodman, A Gorin, M Grassi, M Guigue, DR Hadley, P Hamacher-Baumann, DA Harris, M Hartz, T Hasegawa, S Hassani, NC Hastings, Y Hayato, A Hiramoto, M Hogan, J Holeczek, NT Hong Van, T Honjo, F Iacob, AK Ichikawa, M Ikeda, T Ishida, M Ishitsuka, K Iwamoto, A Izmaylov, N Izumi, M Jakkapu, B Jamieson, SJ Jenkins, C Jesus-Valls, JJ Jiang, P Jonsson, CK Jung, PB Jurj, M Kabirnezhad, H Kakuno, J Kameda, SP Kasetti, Y Kataoka, Y Katayama, T Katori, E Kearns, M Khabibullin, A Khotjantsev, T Kikawa, H Kikutani, S King, J Kisiel, T Kobata, T Kobayashi, L Koch, A Konaka, LL Kormos, Y Koshio, A Kostin, K Kowalik, Y Kudenko, S Kuribayashi, R Kurjata, T Kutter, M Kuze, L Labarga, J Lagoda, M Lamoureux, D Last, M Laveder, M Lawe, S-K Lin, RP Litchfield, SL Liu, A Longhin, L Ludovici, X Lu, T Lux, LN Machado, L Magaletti, K Mahn, M Malek, S Manly, L Maret, AD Marino, L Marti-Magro, T Maruyama, T Matsubara, K Matsushita, C Mauger, A Maurel, K Mavrokoridis, E Mazzucato, N McCauley, J McElwee, KS McFarland, C McGrew, A Mefodiev, GD Megias, L Mellet, M Mezzetto, A Minamino, O Mineev, S Mine, M Miura, L Molina Bueno, S Moriyama, Th A Mueller, D Munford, L Munteanu, Y Nagai, T Nakadaira, M Nakahata, Y Nakajima, A Nakamura, H Nakamura, K Nakamura, Y Nakano, S Nakayama, T Nakaya, K Nakayoshi, CER Naseby, VQ Nguyen, K Niewczas, Y Nishimura, K Nishizaki, E Noah, TS Nonnenmacher, F Nova, J Nowak, JC Nugent, HM O'Keeffe, L O'Sullivan, T Odagawa, T Ogawa, R Okada, K Okumura, T Okusawa, RA Owen, Y Oyama, V Palladino, V Paolone, M Pari, WC Parker, J Parlone, S Parsa, J Pasternak, M Pavin, D Payne, GC Penn, D Pershey, L Pickering, C Pidcott, G Pintaudi, C Pistillo, B Popov, K Porwit, M Posiadala-Zezula, A Pritchard, B Quilain, T Radermacher, E Radicioni, B Radics, PN Ratoff, M Reh, C Riccio, E Rondio, S Roth, A Rubbia, AC Ruggeri, CA Ruggles, A Rychter, LSM Lakshmi, K Sakashita, F Sanchez, G Santucci, CM Schloesser, K Scholberg, M Scott, Y Seiya, T Sekiguchi, H Sekiya, D Sgalaberna, A Shaikhiev, A Shaykina, M Shiozawa, W Shorrock, A Shvartsman, K Skwarczynski, M Smy, JT Sobczyk, H Sobel, FJP Soler, Y Sonoda, R Spina, S Suvorov, A Suzuki, SY Suzuki, Y Suzuki, AA Sztuc, M Tada, M Tajima, A Takeda, Y Takeuchi, HK Tanaka, Y Tanihara, M Tani, N Teshima, N Thamm, LF Thompson, W Toki, C Touramanis, T Towstego, KM Tsui, T Tsukamoto, M Tzanov, Y Uchida, M Vagins, S Valder, D Vargas, G Vasseur, C Vilela, WGS Vinning, T Vladisavljevic, T Wachala, J Walker, JG Walsh, Y Wang, L Wan, D Wark, MO Wascko, A Weber, R Wendell, MJ Wilking, C Wilkinson, JR Wilson, K Wood, C Wret, J Xia, Y-H Xu, K Yamamoto, C Yanagisawa, G Yang, T Yano, K Yasutome, N Yershov, M Yokoyama, T Yoshida, Y Yoshimoto, M Yu, R Zaki, A Zalewska, J Zalipska, K Zaremba, G Zarnecki, M Ziembicki, M Zito, S Zsoldos
More details from the publisher
Details from ArXiV
More details

Pagination

  • Current page 1
  • Page 2
  • Page 3
  • Page 4
  • Page 5
  • Page 6
  • Page 7
  • Page 8
  • Page 9
  • …
  • Next page Next
  • Last page Last

Footer Menu

  • Contact us
  • Giving to the Dept of Physics
  • Work with us

User account menu

  • Log in

Follow us

FIND US

Clarendon Laboratory,

Parks Road,

Oxford,

OX1 3PU

CONTACT US

Tel: +44(0)1865272200

University of Oxfrod logo Department Of Physics text logo
IOP Juno Champion logo Athena Swan Silver Award logo

© University of Oxford - Department of Physics

Cookies | Privacy policy | Accessibility statement

Built by: Versantus

  • Home
  • Research
  • Study
  • Engage
  • Our people
  • News & Comment
  • Events
  • Our facilities & services
  • About us
  • Current students
  • Staff intranet