I. Bernardi

University of Tennessee at Knoxville

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D. S. Parno

Carnegie Mellon University

J. Newby

Lawrence Livermore National Laboratory

K. Walkup

Virginia Tech

J. Mattingly

North Carolina State University

K. Tellez-Giron-Flores

Virginia Tech

A. Major

Duke University

T. Subedi

Concord University

E. Conley

Duke University

T. Johnson

Duke University

K. Ding

University of South Dakota

Cooperative Institutions

Centre National de la Recherche Scientifique

Institut National de Physique Nucléaire et de Physique des Particules

Duke University

Oak Ridge National Laboratory

Triangle Universities Nuclear Laboratory

Indiana University Bloomington

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

Université Paris-Saclay

Université Claude Bernard Lyon 1

Institut de Recherche sur les Lois Fondamentales de l'Univers

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Accessing new physics with an undoped, cryogenic CsI CEvNS detector for COHERENT at the SNS

arXiv (Cornell University) (2023)

P. S. Barbeau V. Belov I. Bernardi C. Bock A. Bolozdynya

We consider the potential for a 10-kg undoped cryogenic CsI detector operating at the Spallation Neutron Source to measure coherent elastic neutrino-nucleus scattering and its sensitivity to discover new physics beyond the standard model. Through a combination of increased event rate, lower threshold, and good timing resolution, such a detector would significantly improve on past measurements. We considered tests of several beyond-the-standard-model scenarios such as neutrino non-standard interactions and accelerator-produced dark matter. This detector's performance was also studied for relevant questions in nuclear physics and neutrino astronomy, namely the weak charge distribution of CsI nuclei and detection of neutrinos from a core-collapse supernova.

Spallation Neutron Source

10.48550/arxiv.2311.13032

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Citations (1)

Measurement of the inclusive electron-neutrino charged-current cross section on ${}^{127}$I with the COHERENT NaI$ν$E detector

arXiv (Cornell University) (2023)

P. An C. Awe P. S. Barbeau B. Becker V. Belov

Using an 185-kg NaI[Tl] array, COHERENT has measured the inclusive electron-neutrino charged-current cross section on ${}^{127}$I with neutrinos produced by the Spallation Neutron Source at Oak Ridge National Laboratory. Iodine is one the heaviest targets for which low-energy ($\leq 50$ MeV) inelastic neutrino-nucleus processes have been measured, and this is the first measurement of its inclusive cross section. After a five-year detector exposure, COHERENT reports a flux-averaged cross section for electron neutrinos produced at a pion decay-at-rest source of $9.2^{+2.1}_{-1.8}\times10^{-40}$ cm$^2$. This corresponds to a value that is $\sim$41% lower than predicted using the MARLEY event generator with a measured Gamow-Teller strength distribution. In addition, the observed visible spectrum from charged-current scattering on ${}^{127}$I has been measured between 10 and 55 MeV, and the exclusive zero-neutron and one-or-more-neutron emission cross sections are measured to be $5.12_{-3.1}^{+3.4} \times 10^{-40}\mbox{ cm}^2$ and $2.2_{-0.5}^{+0.4} \times 10^{-40}\mbox{ cm}^2$, respectively.

Spallation Neutron Source

Charged current

Electron neutrino

10.48550/arxiv.2305.19594

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Coherent elastic neutrino-nucleus scattering: Terrestrial and astrophysical applications

M. Abdullah H. Abele D. Akimov G. Angloher D. Aristizábal Sierra

Coherent elastic neutrino-nucleus scattering (CE$\nu$NS) is a process in which neutrinos scatter on a nucleus which acts as a single particle. Though the total cross section is large by neutrino standards, CE$\nu$NS has long proven difficult to detect, since the deposited energy into the nucleus is $\sim$ keV. In 2017, the COHERENT collaboration announced the detection of CE$\nu$NS using a stopped-pion source with CsI detectors, followed up the detection of CE$\nu$NS using an Ar target. The detection of CE$\nu$NS has spawned a flurry of activities in high-energy physics, inspiring new constraints on beyond the Standard Model (BSM) physics, and new experimental methods. The CE$\nu$NS process has important implications for not only high-energy physics, but also astrophysics, nuclear physics, and beyond. This whitepaper discusses the scientific importance of CE$\nu$NS, highlighting how present experiments such as COHERENT are informing theory, and also how future experiments will provide a wealth of information across the aforementioned fields of physics.

10.2172/1856010

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Measurement of Pbnat(νe,Xn

Physical review. D/Physical review. D. (2023)

P. An C. Awe P. S. Barbeau B. Becker S. W. Belling

Using neutrinos produced at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL), the COHERENT collaboration has studied the $\mathrm{Pb}({\ensuremath{\nu}}_{e},\mathrm{X}n)$ process with a lead neutrino-induced-neutron (NIN) detector. Data from this detector are fit jointly with previously collected COHERENT data on this process. A combined analysis of the two datasets yields a cross section that is ${0.29}_{\ensuremath{-}0.16}^{+0.17}$ times that predicted by the MARLEY event generator using experimentally-measured Gamow-Teller strength distributions, consistent with no NIN events at $1.8\ensuremath{\sigma}$. This is the first inelastic neutrino-nucleus process COHERENT has studied, among several planned exploiting the high flux of low-energy neutrinos produced at the SNS.

Spallation Neutron Source

Neutron generator

10.1103/physrevd.108.072001

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Citations (4)

Coherent elastic neutrino-nucleus scattering: Terrestrial and astrophysical applications

arXiv (Cornell University) (2022)

M. Abdullah H. Abele D. Akimov G. Angloher D. Aristizábal Sierra

10.48550/arxiv.2203.07361

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Measurement of Electron-Neutrino Charged-Current Cross Sections on I127 with the COHERENT NaIν

Physical Review Letters (2023)

P. An C. Awe P. S. Barbeau B. Becker V. Belov

Using an 185-kg NaI[Tl] array, COHERENT has measured the inclusive electron-neutrino charged-current cross section on ^{127}I with pion decay-at-rest neutrinos produced by the Spallation Neutron Source at Oak Ridge National Laboratory. Iodine is one the heaviest targets for which low-energy (≤50 MeV) inelastic neutrino-nucleus processes have been measured, and this is the first measurement of its inclusive cross section. After a five-year detector exposure, COHERENT reports a flux-averaged cross section for electron neutrinos of 9.2_{-1.8}^{+2.1}×10^{-40} cm^{2}. This corresponds to a value that is ∼41% lower than predicted using the MARLEY event generator with a measured Gamow-Teller strength distribution. In addition, the observed visible spectrum from charged-current scattering on ^{127}I has been measured between 10 and 55 MeV, and the exclusive zero-neutron and one-or-more-neutron emission cross sections are measured to be 5.2_{-3.1}^{+3.4}×10^{-40} and 2.2_{-0.5}^{+0.4}×10^{-40} cm^{2}, respectively.

Spallation Neutron Source

10.1103/physrevlett.131.221801

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Citations (7)

The COHERENT Experimental Program

arXiv (Cornell University) (2022)

D. Akimov S. Alawabdeh P. An A. Arteaga C. Awe

The COHERENT experiment located in Neutrino Alley at the Spallation Neutron Source (SNS), Oak Ridge National Laboratory (ORNL), has made the world's first two measurements of coherent elastic neutrino-nucleus scattering (CEvNS), on CsI and argon, using neutrinos produced at the SNS. The COHERENT collaboration continues to pursue CEvNS measurements on various targets as well as additional studies of inelastic neutrino-nucleus interactions, searches for accelerator-produced dark matter (DM) and physics beyond the Standard Model, using the uniquely high-quality and high-intensity neutrino source available at the SNS. This white paper describes primarily COHERENT's ongoing and near-future program at the SNS First Target Station (FTS). Opportunities enabled by the SNS Second Target Station (STS) for the study of neutrino physics and development of novel detector technologies are elaborated in a separate white paper.

Spallation Neutron Source

Semiconductor detector

10.48550/arxiv.2204.04575

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Citations (6)