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  1. Article ; Online: Final Measurement of the ^{235}U Antineutrino Energy Spectrum with the PROSPECT-I Detector at HFIR.

    Andriamirado, M / Balantekin, A B / Bass, C D / Bergeron, D E / Bernard, E P / Bowden, N S / Bryan, C D / Carr, R / Classen, T / Conant, A J / Deichert, G / Delgado, A / Diwan, M V / Dolinski, M J / Erickson, A / Foust, B T / Gaison, J K / Galindo-Uribari, A / Gilbert, C E /
    Gokhale, S / Grant, C / Hans, S / Hansell, A B / Heeger, K M / Heffron, B / Jaffe, D E / Jayakumar, S / Ji, X / Jones, D C / Koblanski, J / Kunkle, P / Kyzylova, O / LaBelle, D / Lane, C E / Langford, T J / LaRosa, J / Littlejohn, B R / Lu, X / Maricic, J / Mendenhall, M P / Meyer, A M / Milincic, R / Mueller, P E / Mumm, H P / Napolitano, J / Neilson, R / Nikkel, J A / Nour, S / Palomino Gallo, J L / Pushin, D A / Qian, X / Roca, C / Rosero, R / Searles, M / Surukuchi, P T / Sutanto, F / Tyra, M A / Venegas-Vargas, D / Weatherly, P B / Wilhelmi, J / Woolverton, A / Yeh, M / Zhang, C / Zhang, X

    Physical review letters

    2023  Volume 131, Issue 2, Page(s) 21802

    Abstract: This Letter reports one of the most precise measurements to date of the antineutrino spectrum from a purely ^{235}U-fueled reactor, made with the final dataset from the PROSPECT-I detector at the High Flux Isotope Reactor. By extracting information from ... ...

    Abstract This Letter reports one of the most precise measurements to date of the antineutrino spectrum from a purely ^{235}U-fueled reactor, made with the final dataset from the PROSPECT-I detector at the High Flux Isotope Reactor. By extracting information from previously unused detector segments, this analysis effectively doubles the statistics of the previous PROSPECT measurement. The reconstructed energy spectrum is unfolded into antineutrino energy and compared with both the Huber-Mueller model and a spectrum from a commercial reactor burning multiple fuel isotopes. A local excess over the model is observed in the 5-7 MeV energy region. Comparison of the PROSPECT results with those from commercial reactors provides new constraints on the origin of this excess, disfavoring at 2.0 and 3.7 standard deviations the hypotheses that antineutrinos from ^{235}U are solely responsible and noncontributors to the excess observed at commercial reactors, respectively.
    Language English
    Publishing date 2023-07-28
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.131.021802
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  2. Book ; Online: Final Measurement of the U235 Antineutrino Energy Spectrum with the PROSPECT-I Detector at HFIR

    Adriamirado, M. / Balantekin, A. B. / Bass, C. D. / Bergeron, D. E. / Bernard, E. P. / Bowden, N. S. / Bryan, C. D. / Carr, R. / Classen, T. / Conant, A. J. / Deichert, G. / Delgado, A. / Diwan, M. V. / Dolinski, M. J. / Erickson, A. / Foust, B. T. / Gaison, J. K. / Galindo-Uribari, A. / Gilbert, C. E. /
    Gokhale, S. / Grant, C. / Hans, S. / Hansell, A. B. / Heeger, K. M. / Heffron, B. / Jaffe, D. E. / Jayakumar, S. / Ji, X. / Jones, D. C. / Koblanski, J. / Kunkle, P. / Kyzylova, O. / LaBelle, D. / Lane, C. E. / Langford, T. J. / LaRosa, J. / Littlejohn, B. R. / Lu, X. / Maricic, J. / Mendenhall, M. P. / Meyer, A. M. / Milincic, R. / Mueller, P. E. / Mumm, H. P. / Napolitano, J. / Neilson, R. / Nikkel, J. A. / Nour, S. / Gallo, J. L. Palomino / Pushin, D. A.

    2022  

    Abstract: This Letter reports one of the most precise measurements to date of the antineutrino spectrum from a purely U235-fueled reactor, made with the final dataset from the PROSPECT-I detector at the High Flux Isotope Reactor. By extracting information from ... ...

    Abstract This Letter reports one of the most precise measurements to date of the antineutrino spectrum from a purely U235-fueled reactor, made with the final dataset from the PROSPECT-I detector at the High Flux Isotope Reactor. By extracting information from previously unused detector segments, this analysis effectively doubles the statistics of the previous PROSPECT measurement. The reconstructed energy spectrum is unfolded into antineutrino energy and compared with both the Huber-Mueller model and a spectrum from a commercial reactor burning multiple fuel isotopes. A local excess over the model is observed in the 5MeV to 7MeV energy region. Comparison of the PROSPECT results with those from commercial reactors provides new constraints on the origin of this excess, disfavoring at 2.2 and 3.2 standard deviations the hypotheses that antineutrinos from U235 are solely responsible and non-contributors to the excess observed at commercial reactors respectively.

    Comment: The paper has been updated with an improved parametrization of the observed antineutrino spectrum excess and extended discussion on its potential isotopic origin
    Keywords Nuclear Experiment ; High Energy Physics - Experiment
    Subject code 660
    Publishing date 2022-12-20
    Publishing country us
    Document type Book ; Online
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  3. Article ; Online: Joint Measurement of the ^{235}U Antineutrino Spectrum by PROSPECT and STEREO.

    Almazán, H / Andriamirado, M / Balantekin, A B / Band, H R / Bass, C D / Bergeron, D E / Bernard, L / Blanchet, A / Bonhomme, A / Bowden, N S / Bryan, C D / Buck, C / Classen, T / Conant, A J / Deichert, G / Del Amo Sanchez, P / Delgado, A / Diwan, M V / Dolinski, M J /
    El Atmani, I / Erickson, A / Foust, B T / Gaison, J K / Galindo-Uribarri, A / Gilbert, C E / Hans, S / Hansell, A B / Heeger, K M / Heffron, B / Jaffe, D E / Jayakumar, S / Ji, X / Jones, D C / Koblanski, J / Kyzylova, O / Labit, L / Lamblin, J / Lane, C E / Langford, T J / LaRosa, J / Letourneau, A / Lhuillier, D / Licciardi, M / Lindner, M / Littlejohn, B R / Lu, X / Maricic, J / Materna, T / Mendenhall, M P / Meyer, A M / Milincic, R / Mueller, P E / Mumm, H P / Napolitano, J / Neilson, R / Nikkel, J A / Nour, S / Palomino, J L / Pessard, H / Pushin, D A / Qian, X / Réal, J-S / Ricol, J-S / Roca, C / Rogly, R / Rosero, R / Salagnac, T / Savu, V / Schoppmann, S / Searles, M / Sergeyeva, V / Soldner, T / Stutz, A / Surukuchi, P T / Tyra, M A / Varner, R L / Venegas-Vargas, D / Vialat, M / Weatherly, P B / White, C / Wilhelmi, J / Woolverton, A / Yeh, M / Zhang, C / Zhang, X

    Physical review letters

    2022  Volume 128, Issue 8, Page(s) 81802

    Abstract: The PROSPECT and STEREO collaborations present a combined measurement of the pure ^{235}U antineutrino spectrum, without site specific corrections or detector-dependent effects. The spectral measurements of the two highest precision experiments at ... ...

    Abstract The PROSPECT and STEREO collaborations present a combined measurement of the pure ^{235}U antineutrino spectrum, without site specific corrections or detector-dependent effects. The spectral measurements of the two highest precision experiments at research reactors are found to be compatible with χ^{2}/ndf=24.1/21, allowing a joint unfolding of the prompt energy measurements into antineutrino energy. This ν[over ¯]_{e} energy spectrum is provided to the community, and an excess of events relative to the Huber model is found in the 5-6 MeV region. When a Gaussian bump is fitted to the excess, the data-model χ^{2} value is improved, corresponding to a 2.4σ significance.
    Language English
    Publishing date 2022-03-11
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.128.081802
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Search for Dark-Matter-Nucleon Interactions via Migdal Effect with DarkSide-50.

    Agnes, P / Albuquerque, I F M / Alexander, T / Alton, A K / Ave, M / Back, H O / Batignani, G / Biery, K / Bocci, V / Bonivento, W M / Bottino, B / Bussino, S / Cadeddu, M / Cadoni, M / Calaprice, F / Caminata, A / Campos, M D / Canci, N / Caravati, M /
    Cargioli, N / Cariello, M / Carlini, M / Cataudella, V / Cavalcante, P / Cavuoti, S / Chashin, S / Chepurnov, A / Cicalò, C / Covone, G / D'Angelo, D / Davini, S / De Candia, A / De Cecco, S / De Filippis, G / De Rosa, G / Derbin, A V / Devoto, A / D'Incecco, M / Dionisi, C / Dordei, F / Downing, M / D'Urso, D / Fairbairn, M / Fiorillo, G / Franco, D / Gabriele, F / Galbiati, C / Ghiano, C / Giganti, C / Giovanetti, G K / Goretti, A M / Grilli di Cortona, G / Grobov, A / Gromov, M / Guan, M / Gulino, M / Hackett, B R / Herner, K / Hessel, T / Hosseini, B / Hubaut, F / Hungerford, E V / Ianni, An / Ippolito, V / Keeter, K / Kendziora, C L / Kimura, M / Kochanek, I / Korablev, D / Korga, G / Kubankin, A / Kuss, M / La Commara, M / Lai, M / Li, X / Lissia, M / Longo, G / Lychagina, O / Machulin, I N / Mapelli, L P / Mari, S M / Maricic, J / Messina, A / Milincic, R / Monroe, J / Morrocchi, M / Mougeot, X / Muratova, V N / Musico, P / Nozdrina, A O / Oleinik, A / Ortica, F / Pagani, L / Pallavicini, M / Pandola, L / Pantic, E / Paoloni, E / Pelczar, K / Pelliccia, N / Piacentini, S / Pocar, A / Poehlmann, D M / Pordes, S / Poudel, S S / Pralavorio, P / Price, D D / Ragusa, F / Razeti, M / Razeto, A / Renshaw, A L / Rescigno, M / Rode, J / Romani, A / Sablone, D / Samoylov, O / Sandford, E / Sands, W / Sanfilippo, S / Savarese, C / Schlitzer, B / Semenov, D A / Shchagin, A / Sheshukov, A / Skorokhvatov, M D / Smirnov, O / Sotnikov, A / Stracka, S / Suvorov, Y / Tartaglia, R / Testera, G / Tonazzo, A / Unzhakov, E V / Vishneva, A / Vogelaar, R B / Wada, M / Wang, H / Wang, Y / Westerdale, S / Wojcik, M M / Xiao, X / Yang, C / Zuzel, G

    Physical review letters

    2023  Volume 130, Issue 10, Page(s) 101001

    Abstract: Dark matter elastic scattering off nuclei can result in the excitation and ionization of the recoiling atom through the so-called Migdal effect. The energy deposition from the ionization electron adds to the energy deposited by the recoiling nuclear ... ...

    Abstract Dark matter elastic scattering off nuclei can result in the excitation and ionization of the recoiling atom through the so-called Migdal effect. The energy deposition from the ionization electron adds to the energy deposited by the recoiling nuclear system and allows for the detection of interactions of sub-GeV/c^{2} mass dark matter. We present new constraints for sub-GeV/c^{2} dark matter using the dual-phase liquid argon time projection chamber of the DarkSide-50 experiment with an exposure of (12 306±184)  kg d. The analysis is based on the ionization signal alone and significantly enhances the sensitivity of DarkSide-50, enabling sensitivity to dark matter with masses down to 40  MeV/c^{2}. Furthermore, it sets the most stringent upper limit on the spin independent dark matter nucleon cross section for masses below 3.6  GeV/c^{2}.
    Language English
    Publishing date 2023-03-24
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.130.101001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Search for Dark Matter Particle Interactions with Electron Final States with DarkSide-50.

    Agnes, P / Albuquerque, I F M / Alexander, T / Alton, A K / Ave, M / Back, H O / Batignani, G / Biery, K / Bocci, V / Bonivento, W M / Bottino, B / Bussino, S / Cadeddu, M / Cadoni, M / Calaprice, F / Caminata, A / Campos, M D / Canci, N / Caravati, M /
    Cargioli, N / Cariello, M / Carlini, M / Cataudella, V / Cavalcante, P / Cavuoti, S / Chashin, S / Chepurnov, A / Cicalò, C / Covone, G / D'Angelo, D / Davini, S / De Candia, A / De Cecco, S / De Filippis, G / De Rosa, G / Derbin, A V / Devoto, A / D'Incecco, M / Dionisi, C / Dordei, F / Downing, M / D'Urso, D / Fiorillo, G / Franco, D / Gabriele, F / Galbiati, C / Ghiano, C / Giganti, C / Giovanetti, G K / Goretti, A M / Grilli di Cortona, G / Grobov, A / Gromov, M / Guan, M / Gulino, M / Hackett, B R / Herner, K / Hessel, T / Hosseini, B / Hubaut, F / Hungerford, E V / Ianni, An / Ippolito, V / Keeter, K / Kendziora, C L / Kimura, M / Kochanek, I / Korablev, D / Korga, G / Kubankin, A / Kuss, M / La Commara, M / Lai, M / Li, X / Lissia, M / Longo, G / Lychagina, O / Machulin, I N / Mapelli, L P / Mari, S M / Maricic, J / Messina, A / Milincic, R / Monroe, J / Morrocchi, M / Mougeot, X / Muratova, V N / Musico, P / Nozdrina, A O / Oleinik, A / Ortica, F / Pagani, L / Pallavicini, M / Pandola, L / Pantic, E / Paoloni, E / Pelczar, K / Pelliccia, N / Piacentini, S / Pocar, A / Poehlmann, D M / Pordes, S / Poudel, S S / Pralavorio, P / Price, D D / Ragusa, F / Razeti, M / Razeto, A / Renshaw, A L / Rescigno, M / Rode, J / Romani, A / Sablone, D / Samoylov, O / Sands, W / Sanfilippo, S / Sandford, E / Savarese, C / Schlitzer, B / Semenov, D A / Shchagin, A / Sheshukov, A / Skorokhvatov, M D / Smirnov, O / Sotnikov, A / Stracka, S / Suvorov, Y / Tartaglia, R / Testera, G / Tonazzo, A / Unzhakov, E V / Vishneva, A / Vogelaar, R B / Wada, M / Wang, H / Wang, Y / Westerdale, S / Wojcik, M M / Xiao, X / Yang, C / Zuzel, G

    Physical review letters

    2023  Volume 130, Issue 10, Page(s) 101002

    Abstract: We present a search for dark matter particles with sub-GeV/c^{2} masses whose interactions have final state electrons using the DarkSide-50 experiment's (12 306±184)  kg d low-radioactivity liquid argon exposure. By analyzing the ionization signals, we ... ...

    Abstract We present a search for dark matter particles with sub-GeV/c^{2} masses whose interactions have final state electrons using the DarkSide-50 experiment's (12 306±184)  kg d low-radioactivity liquid argon exposure. By analyzing the ionization signals, we exclude new parameter space for the dark matter-electron cross section σ[over ¯]_{e}, the axioelectric coupling constant g_{Ae}, and the dark photon kinetic mixing parameter κ. We also set the first dark matter direct-detection constraints on the mixing angle |U_{e4}|^{2} for keV/c^{2} sterile neutrinos.
    Language English
    Publishing date 2023-03-24
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.130.101002
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  6. Book ; Online: PROSPECT-II Physics Opportunities

    Andriamirado, M. / Balantekin, A. B. / Band, H. R. / Bass, C. D. / Bergeron, D. E. / Bowden, N. S. / Bryan, C. D. / Carr, R. / Classen, T. / Conant, A. J. / Deichert, G. / Delgado, A. / Diwan, M. V. / Dolinski, M. J. / Erickson, A. / Foust, B. T. / Gaison, J. K. / Galindo-Uribari, A. / Gilbert, C. E. /
    Grant, C. / Hans, S. / Hansell, A. B. / Heeger, K. M. / Heffron, B. / Jaffe, D. E. / Jayakumar, S. / Ji, X. / Jones, D. C. / Koblanski, J. / Kunkle, P. / Kyzylova, O. / Lane, C. E. / Langford, T. J. / LaRosa, J. / Littlejohn, B. R. / Lu, X. / Maricic, J. / Mendenhall, M. P. / Meyer, A. M. / Milincic, R. / Mueller, P. E. / Mumm, H. P. / Napolitano, J. / Neilson, R. / Nikkel, J. A. / Nour, S. / Palomino, J. L. / Pushin, D. A. / Qian, X. / Rosero, R.

    2021  

    Abstract: The Precision Reactor Oscillation and Spectrum Experiment, PROSPECT, has made world-leading measurements of reactor antineutrinos at short baselines. In its first phase, conducted at the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory, ... ...

    Abstract The Precision Reactor Oscillation and Spectrum Experiment, PROSPECT, has made world-leading measurements of reactor antineutrinos at short baselines. In its first phase, conducted at the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory, PROSPECT produced some of the strongest limits on eV-scale sterile neutrinos, made a precision measurement of the reactor antineutrino spectrum from $^{235}$U, and demonstrated the observation of reactor antineutrinos in an aboveground detector with good energy resolution and well-controlled backgrounds. The PROSPECT collaboration is now preparing an upgraded detector, PROSPECT-II, to probe yet unexplored parameter space for sterile neutrinos and contribute to a full resolution of the Reactor Antineutrino Anomaly, a longstanding puzzle in neutrino physics. By pressing forward on the world's most precise measurement of the $^{235}$U antineutrino spectrum and measuring the absolute flux of antineutrinos from $^{235}$U, PROSPECT-II will sharpen a tool with potential value for basic neutrino science, nuclear data validation, and nuclear security applications. Following a two-year deployment at HFIR, an additional PROSPECT-II deployment at a low enriched uranium reactor could make complementary measurements of the neutrino yield from other fission isotopes. PROSPECT-II provides a unique opportunity to continue the study of reactor antineutrinos at short baselines, taking advantage of demonstrated elements of the original PROSPECT design and close access to a highly enriched uranium reactor core.
    Keywords High Energy Physics - Experiment ; Nuclear Experiment ; Physics - Instrumentation and Detectors
    Subject code 660
    Publishing date 2021-07-08
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Nonfuel Antineutrino Contributions in the High Flux Isotope Reactor.

    Balantekin, A B / Band, H R / Bass, C D / Bergeron, D E / Berish, D / Bowden, N S / Brodsky, J P / Bryan, C D / Classen, T / Conant, A J / Deichert, G / Diwan, M V / Dolinski, M J / Erickson, A / Foust, B T / Gaison, J K / Galindo-Uribarri, A / Gilbert, C E / Hackett, B T /
    Hans, S / Hansell, A B / Heeger, K M / Heffron, B / Jaffe, D E / Ji, X / Jones, D C / Kyzylova, O / Lane, C E / Langford, T J / LaRosa, J / Littlejohn, B R / Lu, X / Maricic, J / Mendenhall, M P / Milincic, R / Mitchell, I / Mueller, P E / Mumm, H P / Napolitano, J / Neilson, R / Nikkel, J A / Norcini, D / Nour, S / Palomino-Gallo, J L / Pushin, D A / Qian, X / Romero-Romero, E / Rosero, R / Surukuchi, P T / Tyra, M A / Varner, R L / White, C / Wilhelmi, J / Woolverton, A / Yeh, M / Zhang, A / Zhang, C / Zhang, X

    Physical review. C

    2020  Volume 101

    Abstract: Reactor neutrino experiments have seen major improvements in precision in recent years. With the experimental uncertainties becoming lower than those from theory, carefully considering all sources ... ...

    Abstract Reactor neutrino experiments have seen major improvements in precision in recent years. With the experimental uncertainties becoming lower than those from theory, carefully considering all sources of
    Language English
    Publishing date 2020-11-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2844098-5
    ISSN 2469-9993 ; 2469-9985
    ISSN (online) 2469-9993
    ISSN 2469-9985
    DOI 10.1103/PhysRevC.101.054605
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Book ; Online: Nonfuel Antineutrino Contributions in the High Flux Isotope Reactor

    Balantekin, A. B. / Band, H. R. / Bass, C. D. / Bergeron, D. E. / Berish, D. / Bowden, N. S. / Brodsky, J. P. / Bryan, C. D. / Classen, T. / Conant, A. J. / Deichert, G. / Diwan, M. V. / Dolinski, M. J. / Erickson, A. / Foust, B. T. / Gaison, J. K. / Galindo-Uribarri, A. / Gilbert, C. E. / Hans, B. T. Hackett S. /
    Hansell, A. B. / Heeger, K. M. / Jaffe, B. Heffron D. E. / Ji, X. / Jones, D. C. / Kyzylova, O. / Lane, C. E. / Langford, T. J. / LaRosa, J. / Littlejohn, B. R. / Lu, X. / Maricic, J. / Mendenhall, M. P. / Milincic, R. / Mitchell, I. / Mueller, P. E. / Mumm, H. P. / Napolitano, J. / Neilson, R. / Nikkel, J. A. / Norcini, D. / Nour, S. / Palomino-Gallo, J. L. / Pushin, D. A. / Qian, X. / Romero-Romero, E. / Rosero, R. / Surukuchi, P. T. / Tyra, M. A. / Varner, R. L. / White, C. / Wilhelmi, J. / Woolverton, A. / Yeh, M. / Zhang, A. / Zhang, C. / Zhang, X.

    2020  

    Abstract: Reactor neutrino experiments have seen major improvements in precision in recent years. With the experimental uncertainties becoming lower than those from theory, carefully considering all sources of $\overline{\nu}_{e}$ is important when making ... ...

    Abstract Reactor neutrino experiments have seen major improvements in precision in recent years. With the experimental uncertainties becoming lower than those from theory, carefully considering all sources of $\overline{\nu}_{e}$ is important when making theoretical predictions. One source of $\overline{\nu}_{e}$ that is often neglected arises from the irradiation of the nonfuel materials in reactors. The $\overline{\nu}_{e}$ rates and energies from these sources vary widely based on the reactor type, configuration, and sampling stage during the reactor cycle and have to be carefully considered for each experiment independently. In this article, we present a formalism for selecting the possible $\overline{\nu}_{e}$ sources arising from the neutron captures on reactor and target materials. We apply this formalism to the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory, the $\overline{\nu}_{e}$ source for the the Precision Reactor Oscillation and Spectrum Measurement (PROSPECT) experiment. Overall, we observe that the nonfuel $\overline{\nu}_{e}$ contributions from HFIR to PROSPECT amount to 1\% above the inverse beta decay threshold with a maximum contribution of 9\% in the 1.8--2.0~MeV range. Nonfuel contributions can be particularly high for research reactors like HFIR because of the choice of structural and reflector material in addition to the intentional irradiation of target material for isotope production. We show that typical commercial pressurized water reactors fueled with low-enriched uranium will have significantly smaller nonfuel $\overline{\nu}_{e}$ contribution.
    Keywords Nuclear Experiment ; High Energy Physics - Experiment
    Subject code 660
    Publishing date 2020-03-27
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Book ; Online: Reactor Rate Modulation oscillation analysis with two detectors in Double Chooz

    Double Chooz Collaboration / Abrahão, T. / Almazan, H. / Anjos, J. C. dos / Appel, S. / Bekman, I. / Bezerra, T. J. C. / Bezrukov, L. / Blucher, E. / Brugière, T. / Buck, C. / Busenitz, J. / Cabrera, A. / Cerrada, M. / Chauveau, E. / Chimenti, P. / Dawson, J. V. / Djurcic, Z. / Etenko, A. /
    Furuta, H. / Gil-Botella, I. / Gonzalez, L. F. G. / Goodman, M. C. / Hara, T. / Hellwig, D. / Hourlier, A. / Ishitsuka, M. / Jochum, J. / Jollet, C. / Kale, K. / Kaneda, M. / Kawasaki, T. / Kemp, E. / de Kerret, H. / Kryn, D. / Kuze, M. / Lachenmaier, T. / Lane, C. E. / Lasserre, T. / Lastoria, C. / Lhuillier, D. / Lima Jr, H. P. / Lindner, M. / López-Castaño, J. M. / LoSecco, J. M. / Lubsandorzhiev, B. / Maeda, J. / Mariani, C. / Maricic, J. / Martino, J. / Matsubara, T. / Mention, G. / Meregaglia, A. / Miletic, T. / Milincic, R. / Minotti, A. / Navas-Nicolás, D. / Novella, P. / Oberauer, L. / Obolensky, M. / Onillon, A. / Oralbaev, A. / Palomares, C. / Pepe, I. M. / Pronost, G. / Reichenbacher, J. / Reinhold, B. / Schönert, S. / Schoppmann, S. / Sharankova, R. / Sibille, V. / Sinev, V. / Skorokhvatov, M. / Soldin, P. / Stahl, A. / Stancu, I. / Stokes, L. F. F. / Suekane, F. / Sukhotin, S. / Sumiyoshi, T. / Sun, Y. / Viaud, B. / Vivier, M. / Wagner, S. / Wiebusch, C. / Yang, G. / Yermia, F.

    2020  

    Abstract: A $\theta_{13}$ oscillation analysis based on the observed antineutrino rates at the Double Chooz far and near detectors for different reactor power conditions is presented. This approach provides a so far unique simultaneous determination of $\theta_{13} ...

    Abstract A $\theta_{13}$ oscillation analysis based on the observed antineutrino rates at the Double Chooz far and near detectors for different reactor power conditions is presented. This approach provides a so far unique simultaneous determination of $\theta_{13}$ and the total background rates without relying on any assumptions on the specific background contributions. The analysis comprises 865 days of data collected in both detectors with at least one reactor in operation. The oscillation results are enhanced by the use of 24.06 days (12.74 days) of reactor-off data in the far (near) detector. The analysis considers the \nue interactions up to a visible energy of 8.5 MeV, using the events at higher energies to build a cosmogenic background model considering fast-neutrons interactions and $^{9}$Li decays. The background-model-independent determination of the mixing angle yields sin$^2(2\theta_{13})=0.094\pm0.017$, being the best-fit total background rates fully consistent with the cosmogenic background model. A second oscillation analysis is also performed constraining the total background rates to the cosmogenic background estimates. While the central value is not significantly modified due to the consistency between the reactor-off data and the background estimates, the addition of the background model reduces the uncertainty on $\theta_{13}$ to 0.015. Along with the oscillation results, the normalization of the anti-neutrino rate is measured with a precision of 0.86\%, reducing the 1.43\% uncertainty associated to the expectation.
    Keywords High Energy Physics - Experiment ; Physics - Instrumentation and Detectors
    Subject code 660
    Publishing date 2020-07-27
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Joint Determination of Reactor Antineutrino Spectra from ^{235}U and ^{239}Pu Fission by Daya Bay and PROSPECT.

    An, F P / Andriamirado, M / Balantekin, A B / Band, H R / Bass, C D / Bergeron, D E / Berish, D / Bishai, M / Blyth, S / Bowden, N S / Bryan, C D / Cao, G F / Cao, J / Chang, J F / Chang, Y / Chen, H S / Chen, S M / Chen, Y / Chen, Y X /
    Cheng, J / Cheng, Z K / Cherwinka, J J / Chu, M C / Classen, T / Conant, A J / Cummings, J P / Dalager, O / Deichert, G / Delgado, A / Deng, F S / Ding, Y Y / Diwan, M V / Dohnal, T / Dolinski, M J / Dolzhikov, D / Dove, J / Dvořák, M / Dwyer, D A / Erickson, A / Foust, B T / Gaison, J K / Galindo-Uribarri, A / Gallo, J P / Gilbert, C E / Gonchar, M / Gong, G H / Gong, H / Grassi, M / Gu, W Q / Guo, J Y / Guo, L / Guo, X H / Guo, Y H / Guo, Z / Hackenburg, R W / Hans, S / Hansell, A B / He, M / Heeger, K M / Heffron, B / Heng, Y K / Hor, Y K / Hsiung, Y B / Hu, B Z / Hu, J R / Hu, T / Hu, Z J / Huang, H X / Huang, J H / Huang, X T / Huang, Y B / Huber, P / Koblanski, J / Jaffe, D E / Jayakumar, S / Jen, K L / Ji, X L / Ji, X P / Johnson, R A / Jones, D C / Kang, L / Kettell, S H / Kohn, S / Kramer, M / Kyzylova, O / Lane, C E / Langford, T J / LaRosa, J / Lee, J / Lee, J H C / Lei, R T / Leitner, R / Leung, J K C / Li, F / Li, H L / Li, J J / Li, Q J / Li, R H / Li, S / Li, S C / Li, W D / Li, X N / Li, X Q / Li, Y F / Li, Z B / Liang, H / Lin, C J / Lin, G L / Lin, S / Ling, J J / Link, J M / Littenberg, L / Littlejohn, B R / Liu, J C / Liu, J L / Liu, J X / Lu, C / Lu, H Q / Lu, X / Luk, K B / Ma, B Z / Ma, X B / Ma, X Y / Ma, Y Q / Mandujano, R C / Maricic, J / Marshall, C / McDonald, K T / McKeown, R D / Mendenhall, M P / Meng, Y / Meyer, A M / Milincic, R / Mueller, P E / Mumm, H P / Napolitano, J / Naumov, D / Naumova, E / Neilson, R / Nguyen, T M T / Nikkel, J A / Nour, S / Ochoa-Ricoux, J P / Olshevskiy, A / Palomino, J L / Pan, H-R / Park, J / Patton, S / Peng, J C / Pun, C S J / Pushin, D A / Qi, F Z / Qi, M / Qian, X / Raper, N / Ren, J / Morales Reveco, C / Rosero, R / Roskovec, B / Ruan, X C / Searles, M / Steiner, H / Sun, J L / Surukuchi, P T / Tmej, T / Treskov, K / Tse, W-H / Tull, C E / Tyra, M A / Varner, R L / Venegas-Vargas, D / Viren, B / Vorobel, V / Wang, C H / Wang, J / Wang, M / Wang, N Y / Wang, R G / Wang, W / Wang, X / Wang, Y / Wang, Y F / Wang, Z / Wang, Z M / Weatherly, P B / Wei, H Y / Wei, L H / Wen, L J / Whisnant, K / White, C / Wilhelmi, J / Wong, H L H / Woolverton, A / Worcester, E / Wu, D R / Wu, F L / Wu, Q / Wu, W J / Xia, D M / Xie, Z Q / Xing, Z Z / Xu, H K / Xu, J L / Xu, T / Xue, T / Yang, C G / Yang, L / Yang, Y Z / Yao, H F / Ye, M / Yeh, M / Young, B L / Yu, H Z / Yu, Z Y / Yue, B B / Zavadskyi, V / Zeng, S / Zeng, Y / Zhan, L / Zhang, C / Zhang, F Y / Zhang, H H / Zhang, J W / Zhang, Q M / Zhang, S Q / Zhang, X / Zhang, X T / Zhang, Y M / Zhang, Y X / Zhang, Y Y / Zhang, Z J / Zhang, Z P / Zhang, Z Y / Zhao, J / Zhao, R Z / Zhou, L / Zhuang, H L / Zou, J H

    Physical review letters

    2022  Volume 128, Issue 8, Page(s) 81801

    Abstract: A joint determination of the reactor antineutrino spectra resulting from the fission of ^{235}U and ^{239}Pu has been carried out by the Daya Bay and PROSPECT Collaborations. This Letter reports the level of consistency of ^{235}U spectrum measurements ... ...

    Abstract A joint determination of the reactor antineutrino spectra resulting from the fission of ^{235}U and ^{239}Pu has been carried out by the Daya Bay and PROSPECT Collaborations. This Letter reports the level of consistency of ^{235}U spectrum measurements from the two experiments and presents new results from a joint analysis of both data sets. The measurements are found to be consistent. The combined analysis reduces the degeneracy between the dominant ^{235}U and ^{239}Pu isotopes and improves the uncertainty of the ^{235}U spectral shape to about 3%. The ^{235}U and ^{239}Pu antineutrino energy spectra are unfolded from the jointly deconvolved reactor spectra using the Wiener-SVD unfolding method, providing a data-based reference for other reactor antineutrino experiments and other applications. This is the first measurement of the ^{235}U and ^{239}Pu spectra based on the combination of experiments at low- and highly enriched uranium reactors.
    Language English
    Publishing date 2022-03-11
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.128.081801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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