One of the signatures of coherent elastic neutrino-nucleus scattering (CEvNS) is the predicted scaling of the cross section with number of neutrons in the recoiling nucleus squared (N$^2$). The COHERENT collaboration was formed to study CEvNS with a variety of targets to test the physics of CEvNS, including the N$^2$ cross section scaling. As part of COHERENT, a segmented ton-scale NaI[Tl]...
The first observation of coherent elastic neutrino-nucleus scattering (CEvNS) was made by the COHERENT collaboration at the Oak Ridge National Laboratory (ORNL) Spallation Neutron Source (SNS) in August 2017 with a 14.6 kg CsI(Na) detector. One of the physics goals of the COHERENT experiment is to test the N$^2$ dependence of the CEvNS cross section predicted in the Standard Model by...
Neutron stars are cosmic laboratories uniquely poised to answer fundamental questions about the nature of dense neutron-rich matter. However, knowledge of the equation of state of neutron-rich matter is hindered by uncertainties in the neutron distribution of neutron-rich nuclei. Electroweak probes of ground state densities provide a clean and model-independent tool to mitigate these...
CEvNS in effective field theory.
Assuming light vector mediators, we discuss the effects of CP violation on the coherent elastic neutrino-nucleus scattering (CEvNS) process in the COHERENT sodium-iodine, liquid argon and germanium detectors. We show that in some regions of the parameter space, the presence of a dip in the event rate spectrum can be used to constraint CP violating effects. In other regions, we find that CP...
Neutrino non-standard interactions and signatures in CEvNS experiments.
I will discuss the usefulness of timing information in the COHERENT experiment in the search for dark matter signals.
We consider a model of light (sub-GeV) dark matter that escapes many
of the bounds placed by current dark matter searches. Such low mass
dark matter candidates, if produced as a thermal relic in the early
universe, must be accompanied by light mediators in order to reproduce
the dark matter abundance observed in the present-day universe. These
light mediators provide new channels for the...
We classify new physics signals in coherent elastic neutrino-nucleus scattering (CEvNS) processes induced by B8 solar neutrinos in multi-ton xenon dark matter (DM) detectors. Our analysis focuses on vector and scalar interactions in the effective and light mediator limits after considering the constraints emerging from the recent COHERENT data and neutrino masses. In both cases we identify a...
The CONUS experiment is located at the nuclear power plant of Brokdorf, Germany, at 17m distance from the reactor core. It aims at detecting coherent elastic neutrino nucleus scattering with four high-purity point contact Germanium detectors with a noise threshold in the range of 300 eV inside an elaborate shield. Proximity to a reactor core requires an in-depth understanding of the neutron...
The RED-100 is a two-phase emission detector created to investigate coherent elastic neutrino scattering off xenon nuclei. Its active volume has a cylindrical shape with sizes of ~ 40 cm. The total mass of liquid xenon in the detector equals 200 kg. The detector performance provides sensitivity down to a single ionization electron while allows operation at a ground surface environment. In this...
Progress and plans for the Ricochet experiment.
Last results from the CONNIE collaboration and prospects for next generation of experiments based on Skipper CCD.
The Advanced Imager Technology group at MIT Lincoln Laboratory designs and fabricates detectors and readout circuits for imaging applications in support of National Security and scientific exploration. The group has a long history of supplying silicon charge-coupled devices (CCDs) for the astronomy community, including detectors for the Transiting Exoplanet Survey Satellite (TESS), the...
Coherent elastic neutrino-nucleus scattering (CEvNS) is a neutral-current process in which a neutrino scatters off an entire nucleus, depositing a tiny recoil energy. The process is important in core-collapse supernovae and also presents an opportunity for detection of a burst of core-collapse supernova neutrinos in low-threshold detectors designed for dark matter detection. Here we present an...
Topics from Tokyo workshop "Dark matter searches in the 2020s - At the crossroads of the WIMP".
Paleo-detectors are a proposed experimental technique in which one would search for traces of recoiling nuclei in ancient minerals. Natural minerals on Earth are as old as $\mathcal{O}(1)\,$Gyr and, in many minerals, the damage tracks left by recoiling nuclei are also preserved for time scales long compared to $1\,$Gyr once created. Thus, even reading out relatively small target samples of...
Plans towards CEvNS observation with LAr detectors at nuclear reactors and possibilities in nuclear safeguards.
Emerging technology and nonproliferation.
Two-phase xenon detectors are being actively developed over the last decade and made substantial improvement of search sensitivity for WIMP dark matter. These detectors, operated in time projection chamber (TPC) mode, strongly suppress the electronic recoil background, making it possible to detect CEvNS of neutrinos at the Spallation Neutron Source (SNS). In addition, two-phase xenon detectors...
We will discuss the sensitivity of the COHERENT experiment to test sub-GeV dark matter candidates that may be produced by the SNS and highlight the advantages of using CEvNS detectors for these searches. We also will show strategies within reach of the next generation of detectors that maximize discovery potential for such detectors.
The LZ dark matter detector is currently under construction at the 4850 level of the Sanford Underground Research Facility (SURF) in Lead, SD. The experiment will contain 7 tonnes of pure xenon in a dual-phase Time Project Chamber (TPC) – a technology that has demonstrated very high sensitivities to hypothetical dark matter interactions. LZ is projected to reach unprecedented sensitivities for...
CYGNUS is a coordinated effort by dark matter direct search groups interested in directional signals, working towards design and build of a global network of directional WIMP experiments able to probe below the neutrino floor. As such, sensitivity is required to detection and measurement of Solar neutrino-nucleus scattering with directional information. The proposed technology is that of low...
Panel discussion of the Snowmass process, its influence on US high-energy physics funding, and the opportunities for the CE$\nu$NS community to organize itself and participate effectively.
Low-energy nuclear recoil calibrations for SuperCDMS.
The Coherent Elastic Neutrino-Nucleus Scattering has been observed by the
COHERENT collaboration using a 14.6-kg CsI[Na] scintillator at Oak Ridge National Laboratory. This indicates a new way to build a compact neutrino detector and unlocks new channels to test the Standard Model. One challenge is to understand the neutrino-induced low energy nuclear recoils. It is commonly known that the...
Measurement of low-energy nuclear recoil quenching factors in liquid xenon.
Neutrino flux measurement at the SNS with a D2O detector
Neutrino source simulations for the SNS and STS
Various anomalies exist in reactor and accelerator based neutrino experiments. CEvNS experiments are well-positioned to probe possible connections of a short-baseline neutrino oscillation effect to existing anomalies. Considerable complementarity in the flavor and mass space is possible by a combination of experimental efforts.
The MINER collaboration effort to observe CE$\nu$NS.
Abstract.
In experiments aiming on low-interaction energies—exemplified within the low energy neutrinos coherent scatter and quest for low-mass dark matter particles—researchers must understand the underlying noise mechanisms in their detectors. We observed patterns among low-energy detector backgrounds, which invited questions about condensed matter effects in materials under energy flow....
Neutrino detectors have the proven capability to monitor nuclear reactor power levels and fuel consumption by observing the energy spectrum of neutrinos emitted by the reactor. However, conventional neutrino detection techniques require massive detectors that would be difficult to deploy in the field for nuclear monitoring applications. A new detection method, Coherent Elastic...
In this talk, I will show the discovery prospects of Axion-like particle (ALP) at CE$\nu$NS experiments. We consider the ALPs that couples to the standard model through the $a\gamma\gamma$ interaction. The CE$\nu$NS experiments, utilizing reactors and high-intensity proton beam at stopped pion experiments, produce a large number of photons that will be converted to ALPs via the Primakoff...
This talk will provide a brief description of the experimental methods and for PVES scattering, particularly for neutron skin measurements. It will also summarize the theoretical motivation for this type of measurement.
Measurement of the weak-mixing angle with CEvNS.
Coherent elastic neutrino-atom scattering.
Elucidating the electromagnetic properties of neutrinos with CEvNS.
We discuss new physics opportunities that are accessible from CEvNS measurements. Specifically, we explore the potential of probing neutrino transition magnetic moments and the existence of sterile neutrinos. We present the relevant constraints extracted from the existing COHERENT data as well as we estimate the projected sensitivities at future CEvNS experiments
The idea of measuring the coherent elastic nuclear scattering of neutrinos emitted by a high intensity $^{51}$Cr radioactive source is investigated.
To produce a high-intensity source, the radioactive material used in the GALLEX experiment (36 kg of Chromium 38.6 % enriched in $^{50}$Cr) could be reactivated to the intensity of a few MCi.
The advantages of this source are that the activity...
The J-PARC Material and Life Science Experimental Facility (MLF) is a pulsed spallation neutron source in Tokai, Japan. 3 GeV protons produced by the Rapid Cycling Synchrotron (RCS) are directed onto a mercury target at 25 Hz to produce an intense source of neutrons and decay-at-rest neutrinos. In this talk, I will describe the MLF facility with a particular focus on the neutrino source...
Summary of the discussions had over the course of the workshop and any plans developed for CE$\nu$NS-community efforts to participate in the Snowmass process.
The COHERENT collaboration recently made the first measurement of the Coherent Elastic Neutrino-Nucleus Scattering (CEvNS) process, more than 40 years after its theoretical prediction, by using neutrinos produced in the Spallation Neutron Source (SNS) at the Oak Ridge National Laboratory. This measurement opened up a window to further studies of interest to a diverse community of physicists....
The suite of detector targets as part of the COHERENT experimental program includes a ton-scale array of NaI[Tl] crystals designed to measure CEvNS interactions on sodium and iodine, and to study charged-current neutrino interactions on iodine. The 7.7 kg NaI[TI] crystals being used are repurposed detector modules and must be characterized for quality and suitability for this detector. One set...
The Spallation Neutron Source (SNS) and the High Flux Isotope Reactor (HFIR) of ORNL are two very powerful neutrino sources. Coherent elastic neutrino-nucleus scattering (CE$\nu$NS) was first predicted in 1974 and recently observed by the COHERENT collaboration taking advantage of the extremely high-quality stopped-pion neutrino source available at the SNS. CE$\nu$NS is a process in which a...
The NaI/CsI(Tl) crystals are widely used in experiments to search for dark matter and coherent elastic neutrino-nucleus scattering thanks to their high scintillation light yields (~50 photons/keV) and relatively low costs. An even higher light yield of NaI/CsI crystals will lead to a lower energy threshold and better energy resolution. It was observed that the light yields of undoped NaI/CsI...
