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1دورية أكاديمية
المؤلفون: Anatael Cabrera, Yang Han, Michel Obolensky, Fabien Cavalier, João Coelho, Diana Navas-Nicolás, Hiroshi Nunokawa, Laurent Simard, Jianming Bian, Nitish Nayak, Juan Pedro Ochoa-Ricoux, Bedřich Roskovec, Pietro Chimenti, Stefano Dusini, Mathieu Bongrand, Rebin Karaparambil, Victor Lebrin, Benoit Viaud, Frederic Yermia, Lily Asquith, Thiago J. C. Bezerra, Jeff Hartnell, Pierre Lasorak, Jiajie Ling, Jiajun Liao, Hongzhao Yu
المصدر: Scientific Reports, Vol 12, Iss 1, Pp 1-14 (2022)
الوصف: Abstract The measurement of neutrino mass ordering (MO) is a fundamental element for the understanding of leptonic flavour sector of the Standard Model of Particle Physics. Its determination relies on the precise measurement of $$\Delta m^2_{31}$$ Δ m 31 2 and $$\Delta m^2_{32}$$ Δ m 32 2 using either neutrino vacuum oscillations, such as the ones studied by medium baseline reactor experiments, or matter effect modified oscillations such as those manifesting in long-baseline neutrino beams (LB $$\nu$$ ν B) or atmospheric neutrino experiments. Despite existing MO indication today, a fully resolved MO measurement ( $$\ge 5\sigma$$ ≥ 5 σ ) is most likely to await for the next generation of neutrino experiments: JUNO, whose stand-alone sensitivity is $$\sim 3\sigma$$ ∼ 3 σ , or LB $$\nu$$ ν B experiments (DUNE and Hyper-Kamiokande). Upcoming atmospheric neutrino experiments are also expected to provide precious information. In this work, we study the possible context for the earliest full MO resolution. A firm resolution is possible even before 2028, exploiting mainly vacuum oscillation, upon the combination of JUNO and the current generation of LB $$\nu$$ ν B experiments (NOvA and T2K). This opportunity is possible thanks to a powerful synergy boosting the overall sensitivity where the sub-percent precision of $$\Delta m^2_{32}$$ Δ m 32 2 by LB $$\nu$$ ν B experiments is found to be the leading order term for the MO earliest discovery. We also found that the comparison between matter and vacuum driven oscillation results enables unique discovery potential for physics beyond the Standard Model.
وصف الملف: electronic resource
العلاقة: https://doaj.org/toc/2045-2322Test
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2دورية أكاديمية
المؤلفون: M A Acero, P Adamson, G Agam, L Aliaga, Tyler Alion, V Allakhverdian, S Altakarli, N Anfimov, A Antoshkin, Lily Asquith, E Arrieta-Diaz, A Aurisano, Jeff Hartnell, Brett Mayes, Yihan Zhang
مصطلحات موضوعية: Uncategorised value
الوصف: Cross sections for the interaction νμA→μ-π0X with neutrino energies between 1 and 5 GeV are measured using a sample of 165,000 selected events collected in the NOvA experiment's near detector, a hydrocarbon-based detector exposed to the Neutrinos from the Main Injector beam at the Fermi National Accelerator Laboratory. Results are presented as a flux-averaged total cross section and as differential cross sections in the momenta and angles of the outgoing muon and π0, the total four-momentum transfer, and the invariant mass of the hadronic system. Comparisons are made with predictions from a reference version of the genie neutrino interaction generator. The measured total cross section of (3.57±0.44)×10-39 cm2 is 7.5% higher than the genie prediction, but is consistent within experimental errors.
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3دورية أكاديمية
المؤلفون: Lily Asquith, Robert Darby, Iker De Icaza Astiz, Clark Griffith, Jeff Hartnell, Robert Kralik, Simon Peeters, Joshua Porter, Michal Rigan, Kate Shaw, Thiago Sogo Bezerra, Klaudia Wawrowska
مصطلحات موضوعية: Uncategorised value
الوصف: A primary goal of the upcoming Deep Underground Neutrino Experiment (DUNE) is to measure the O(10) MeV neutrinos produced by a Galactic core-collapse supernova if one should occur during the lifetime of the experiment. The liquid-argon-based detectors planned for DUNE are expected to be uniquely sensitive to the νe component of the supernova flux, enabling a wide variety of physics and astrophysics measurements. A key requirement for a correct interpretation of these measurements is a good understanding of the energy-dependent total cross section σ(Eν) for charged-current νe absorption on argon. In the context of a simulated extraction of supernova νe spectral parameters from a toy analysis, we investigate the impact of σ(Eν) modeling uncertainties on DUNE's supernova neutrino physics sensitivity for the first time. We find that the currently large theoretical uncertainties on σ(Eν) must be substantially reduced before the νe flux parameters can be extracted reliably; in the absence of external constraints, a measurement of the integrated neutrino luminosity with less than 10% bias with DUNE requires σ(Eν) to be known to about 5%. The neutrino spectral shape parameters can be known to better than 10% for a 20% uncertainty on the cross-section scale, although they will be sensitive to uncertainties on the shape of σ(Eν). A direct measurement of low-energy νe-argon scattering would be invaluable for improving the theoretical precision to the needed level.
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4دورية أكاديمية
المؤلفون: AA Abud, B Abi, R Acciarri, MA Acero, Iker De Icaza Astiz, Clark Griffith, Lily Asquith, Jeff Hartnell, Robert Kralik, Simon Peeters, Joshua Porter, Kate Shaw, Thiago Sogo Bezerra, Klaudia Wawrowska, DUNE Collaboration
مصطلحات موضوعية: Uncategorised value
الوصف: Measurements of electrons from νe interactions are crucial for the Deep Underground Neutrino Experiment (DUNE) neutrino oscillation program, as well as searches for physics beyond the standard model, supernova neutrino detection, and solar neutrino measurements. This article describes the selection and reconstruction of low-energy (Michel) electrons in the ProtoDUNE-SP detector. ProtoDUNE-SP is one of the prototypes for the DUNE far detector, built and operated at CERN as a charged particle test beam experiment. A sample of low-energy electrons produced by the decay of cosmic muons is selected with a purity of 95%. This sample is used to calibrate the low-energy electron energy scale with two techniques. An electron energy calibration based on a cosmic ray muon sample uses calibration constants derived from measured and simulated cosmic ray muon events. Another calibration technique makes use of the theoretically well-understood Michel electron energy spectrum to convert reconstructed charge to electron energy. In addition, the effects of detector response to low-energy electron energy scale and its resolution including readout electronics threshold effects are quantified. Finally, the relation between the theoretical and reconstructed low-energy electron energy spectra is derived, and the energy resolution is characterized. The low-energy electron selection presented here accounts for about 75% of the total electron deposited energy. After the addition of lost energy using a Monte Carlo simulation, the energy resolution improves from about 40% to 25% at 50 MeV. These results are used to validate the expected capabilities of the DUNE far detector to reconstruct low-energy electrons.
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5دورية أكاديمية
المؤلفون: A Abed Abud, B Abi, R Acciarri, M R Adames, G Adamov, M Adamowski, Lily Asquith, Clark Griffith, Simon Peeters, Kate Shaw, K Wawrowska, Iker De Icaza Astiz, others
مصطلحات موضوعية: Uncategorised value
الوصف: The rapid development of general-purpose computing on graphics processing units (GPGPU) is allowing the implementation of highly-parallelized Monte Carlo simulation chains for particle physics experiments. This technique is particularly suitable for the simulation of a pixelated charge readout for time projection chambers, given the large number of channels that this technology employs. Here we present the first implementation of a full microphysical simulator of a liquid argon time projection chamber (LArTPC) equipped with light readout and pixelated charge readout, developed for the DUNE Near Detector. The software is implemented with an end-to-end set of GPU-optimized algorithms. The algorithms have been written in Python and translated into CUDA kernels using Numba, a just-in-time compiler for a subset of Python and NumPy instructions. The GPU implementation achieves a speed up of four orders of magnitude compared with the equivalent CPU version. The simulation of the current induced on 10^3 pixels takes around 1 ms on the GPU, compared with approximately 10 s on the CPU. The results of the simulation are compared against data from a pixel-readout LArTPC prototype.
العلاقة: 10779/uos.23496590.v1; https://figshare.com/articles/journal_contribution/Highly-parallelized_simulation_of_a_pixelated_LArTPC_on_a_GPU/23496590Test
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6دورية أكاديمية
المؤلفون: AA Abud, B Abi, Tyler Alion, Aran Borkum, Lily Asquith, Georgia Chisnall, Iker De Icaza Astiz, A Earle, Clark Griffith, Jeff Hartnell, Pierre Lasorak, Simon Peeters, Joshua Porter, Thiago Sogo Bezerra, Sammy Valder, Fang Xie, others
مصطلحات موضوعية: DUNE Collaboration
الوصف: DUNE is a dual-site experiment for long-baseline neutrino oscillation studies, neutrino astrophysics and nucleon decay searches. ProtoDUNE Dual Phase (DP) is a 6 × 6 × 6 m3 liquid argon time-projection-chamber (LArTPC) that recorded cosmic-muon data at the CERN Neutrino Platform in 2019–2020 as a prototype of the DUNE Far Detector. Charged particles propagating through the LArTPC produce ionization and scintillation light. The scintillation light signal in these detectors can provide the trigger for non-beam events. In addition, it adds precise timing capabilities and improves the calorimetry measurements. In ProtoDUNE-DP, scintillation and electroluminescence light produced by cosmic muons in the LArTPC is collected by photomultiplier tubes placed up to 7 m away from the ionizing track. In this paper, the ProtoDUNE-DP photon detection system performance is evaluated with a particular focus on the different wavelength shifters, such as PEN and TPB, and the use of Xe-doped LAr, considering its future use in giant LArTPCs. The scintillation light production and propagation processes are analyzed and a comparison of simulation to data is performed, improving understanding of the liquid argon properties.
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7دورية أكاديمية
المؤلفون: MA Acero, P Adamson, L Aliaga, N Anfimov, A Antoshkin, E Arrieta-Diaz, Lily Asquith, R Kralik, Brett Mayes, Joshua Porter, Y Zhang, N Balashov, P Baldi, BA Bambah, Jeff Hartnell, The NOvA Collaboration
مصطلحات موضوعية: Uncategorised value
الوصف: We present new ?µ??e, ?µ??µ, ?¯µ??¯e, and ?¯µ??¯µ oscillation measurements by the NOvA experiment, with a 50% increase in neutrino-mode beam exposure over the previously reported results. The additional data, combined with previously published neutrino and antineutrino data, are all analyzed using improved techniques and simulations. A joint fit to the ?e, ?µ, ?¯e, and ?¯µ candidate samples within the 3-flavor neutrino oscillation framework continues to yield a best-fit point in the normal mass ordering and the upper octant of the ?23 mixing angle, with ?m322=(2.41±0.07)×10-3 eV2 and sin2?23=0.57-0.04+0.03. The data disfavor combinations of oscillation parameters that give rise to a large asymmetry in the rates of ?e and ?¯e appearance. This includes values of the charge parity symmetry (CP) violating phase in the vicinity of dCP=p/2 which are excluded by >3s for the inverted mass ordering, and values around dCP=3p/2 in the normal ordering which are disfavored at 2s confidence.
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8دورية أكاديمية
المؤلفون: A Abed Abud, B Abi, T Alion, Lily Asquith, T S Bezerra, Aran Borkum, Georgia Chisnall, Iker De Icaza Astiz, A Earle, Clark Griffith, Jeff Hartnell, R Kralik, Pierre Lasorak, Simon Peeters, Joshua Porter, Sammy Valder, K Wawrowska, Fang Xie, others
مصطلحات موضوعية: Affordable and Clean Energy
الوصف: Liquid argon time projection chamber detector technology provides high spatial and calorimetric resolutions on the charged particles traversing liquid argon. As a result, the technology has been used in a number of recent neutrino experiments, and is the technology of choice for the Deep Underground Neutrino Experiment (DUNE). In order to perform high precision measurements of neutrinos in the detector, final state particles need to be effectively identified, and their energy accurately reconstructed. This article proposes an algorithm based on a convolutional neural network to perform the classification of energy deposits and reconstructed particles as track-like or arising from electromagnetic cascades. Results from testing the algorithm on experimental data from ProtoDUNE-SP, a prototype of the DUNE far detector, are presented. The network identifies track- and shower-like particles, as well as Michel electrons, with high efficiency. The performance of the algorithm is consistent between experimental data and simulation.
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9دورية أكاديمية
المؤلفون: G Aad, B Abbott, D C Abbott, Benedict Allbrooke, Marco Aparo, Lily Asquith, Alessandro Cerri, Antonella De Santo, Meirin Oan Evans, Mario Grandi, Daniela Maria Köck, Josh McFayden, Fabrizio Salvatore, Mark Sutton, Iacopo Vivarelli, Ioannis Xiotidis, ATLAS Collaboration, others
مصطلحات موضوعية: Uncategorised value
الوصف: The accurate simulation of additional interactions at the ATLAS experiment for the analysis of proton–proton collisions delivered by the Large Hadron Collider presents a significant challenge to the computing resources. During the LHC Run 2 (2015–2018), there were up to 70 inelastic interactions per bunch crossing, which need to be accounted for in Monte Carlo (MC) production. In this document, a new method to account for these additional interactions in the simulation chain is described. Instead of sampling the inelastic interactions and adding their energy deposits to a hard-scatter interaction one-by-one, the inelastic interactions are presampled, independent of the hard scatter, and stored as combined events. Consequently, for each hard-scatter interaction, only one such presampled event needs to be added as part of the simulation chain. For the Run 2 simulation chain, with an average of 35 interactions per bunch crossing, this new method provides a substantial reduction in MC production CPU needs of around 20%, while reproducing the properties of the reconstructed quantities relevant for physics analyses with good accuracy.
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10دورية أكاديمية
المؤلفون: A Abed Abud, B Abi, Tyler Alion, Thiago Sogo Bezerra, Lily Asquith, Aran Borkum, Georgia Chisnall, Iker De Icaza Astiz, A Earle, Clark Griffith, Jeff Hartnell, Pierre Lasorak, Simon Peeters, Joshua Porter, Fang Xie, The DUNE Collaboration, others
مصطلحات موضوعية: Uncategorised value
الوصف: The ProtoDUNE-SP detector is a single-phase liquid argon time projection chamber (LArTPC) that was constructed and operated in the CERN North Area at the end of the H4 beamline. This detector is a prototype for the first far detector module of the Deep Underground Neutrino Experiment (DUNE), which will be constructed at the Sandford Underground Research Facility (SURF) in Lead, South Dakota, U.S.A. The ProtoDUNE-SP detector incorporates full-size components as designed for DUNE and has an active volume of 7 × 6 × 7.2 m3. The H4 beam delivers incident particles with well-measured momenta and high-purity particle identification. ProtoDUNE-SP's successful operation between 2018 and 2020 demonstrates the effectiveness of the single-phase far detector design. This paper describes the design, construction, assembly and operation of the detector components.
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