Coherency in neutrino-nucleus elastic scattering

Kerman, S.; Sharma, V.; Deniz, M.; Wong, H. T.; Chen, Jiunn-Wei; Li, H. B.; Lin, Shou-De; Liu, C.-P.; Yue, Qian

doi:10.1103/physrevd.93.113006

Cited by 58 publications

(64 citation statements)

References 23 publications

(30 reference statements)

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“…The event rate presented here is based on the standard formula for neutrinonucleus coherent scattering, quenching factor Q f = 1 (i.e. no quenching), and the coherency is more than 0.9 in the range of T [30].…”

Section: Resultsmentioning

confidence: 99%

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Discovery potential of multiton xenon detectors in neutrino electromagnetic properties

Hsieh

Singh

et al. 2019

Phys. Rev. D

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Next-generation xenon detectors with multi-ton-year exposure are powerful direct probes of dark matter candidates, in particular the favorite weakly-interacting massive particles. Coupled with the features of low thresholds and backgrounds, they are also excellent telescopes of solar neutrinos.In this paper, we study the discovery potential of ton-scale xenon detectors in electromagnetic moments of solar neutrinos. Relevant neutrino-atom scattering processes are calculated by applying a state-of-the-arts atomic many-body method-relativistic random phase approximation (RRPA).Limits on these moments are derived from existing data and estimated with future experiment specifications. With one ton-year exposure, XENON-1T can improve the effective milli-charge constraint by a factor two. With LZ and DARWIN, the projected improvement on the solar neutrino effective milli-charge(magnetic moment) is around 7(2) times smaller than the current bound. If LZ can keep the same background level and push the electron recoil threshold to 0.5 keV, the projected improvement on milli-charge(magnetic moment) is about 10(3) times smaller than the current bound. a

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Section: Resultsmentioning

confidence: 99%

“…(6) can be found in Ref. [30]. We only re-iterate the importance of atomic structure in these calculations, and highlight some key features of our results.…”

Section: Scattering Of Solar Neutrinos Off Xenon Atomsmentioning

confidence: 91%

Discovery potential of multiton xenon detectors in neutrino electromagnetic properties

Hsieh

Singh

et al. 2019

Phys. Rev. D

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“…At the same time, the phases of corresponding neutrino-proton and neutrino-neutron amplitudes are all equal for protons and neutrons, respectively. This is at odds with the assumption that the difference of phases of the scattering amplitudes is responsible for loss of coherency [17,33,68]. Our arguments are discussed in what follows.…”

Section: Arxiv:180608768v1 [Hep-ph] 22 Jun 2018mentioning

confidence: 88%

Coherency and incoherency in neutrino-nucleus elastic and inelastic scattering

2018

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Neutrino-nucleus scattering νA → νA, in which the nucleus conserves its integrity, is considered. Our consideration follows a microscopic description of the nucleus as a bound state of its constituent nucleons described by a multi-particle wave-function of a general form.We show that elastic interactions keeping the nucleus in the same quantum state lead to a quadratic enhancement of the corresponding cross-section in terms of the number of nucleons. Meanwhile, the crosssection of inelastic processes in which the quantum state of the nucleus is changed, essentially has a linear dependence on the number of nucleons. These two classes of processes are referred to as coherent and incoherent, respectively.Accounting for all possible initial and final internal states of the nucleus leads to a general conclusion independent of the nuclear model. The coherent and incoherent cross-sections are driven by factors |F p/n | 2 and (1 − |F p/n | 2 ), where |F p/n | 2 is a proton/neutron form-factor of the nucleus, averaged over its initial states. Therefore, our assessment suggests a smooth transition between regimes of coherent and incoherent neutrinonucleus scattering. In general, both regimes contribute to experimental observables.The coherent cross-section formula used in the literature is revised and corrections depending on kinematics are estimated. Consideration of only those matrix elements which correspond to the same initial and final spin states of the nucleus and accounting for a non-zero momentum of the target nucleon are two main sources of the corrections.As an illustration of the importance of the incoherent channel we considered three experimental setups with different nuclei. As an example, for 133 Cs and neutrino energies of 30 − 50 MeV the incoherent cross-section is about 10-20% of the coherent contribution if experimental detection threshold is accounted for.Experiments attempting to measure coherent neutrino scattering by solely detecting the recoiling nucleus, as is typical, might be including an incoherent background that is indistinguishable from the signal if the excitation gamma eludes its detection. However, as is shown here, the incoherent component can be measured directly by searching for photons released by the excited nuclei inherent to the incoherent channel. For a beam experiment these gammas should be correlated in time with the beam, and their higher energies make the corresponding signal easily detectable at a rate governed by the ratio of incoherent to coherent cross-sections. The detection of signals due to the nuclear recoil and excitation γs provides a more sensitive instrument in studies of nuclear structure and possible signs of new physics. CONTENTS

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“…Multiple experimental efforts for detecting CNNS are made globally: the COHERENT experiment [3] which is currently taking data at the Spallation Neutron Source (SNS) uses a combination of conventional CsI, Ge and liquid-Xe detectors. Various other experiments are planned or being commissioned such as CONNIE [4] using CCDs [5], TEX-ONO [6] using ionization-based Ge detectors, and MINER [7] and RICOCHET [8] using cryogenic detector technology.…”

Section: Introductionmentioning

confidence: 99%

The $$\nu $$ ν -cleus experiment: a gram-scale fiducial-volume cryogenic detector for the first detection of coherent neutrino–nucleus scattering

et al. 2017

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We discuss a small-scale experiment, called ν-cleus, for the first detection of coherent neutrino-nucleus scattering by probing nuclear-recoil energies down to the 10 eV regime. The detector consists of low-threshold CaWO 4 and Al 2 O 3 calorimeter arrays with a total mass of about 10 g and several cryogenic veto detectors operated at millikelvin temperatures. Realizing a fiducial volume and a multi-element target, the detector enables active discrimination of γ , neutron and surface backgrounds. A first prototype Al 2 O 3 device, operated above ground in a setup without shielding, has achieved an energy threshold of ∼20 eV and further improvements are in reach. A sensitivity study for the detection of coherent neutrino scattering at nuclear power plants shows a unique discovery potential (5σ ) within a measuring time of 2 weeks. Furthermore, a site at a thermal research reactor and the use of a radioactive neutrino source are investigated. With this technology, real-time monitoring of nuclear power plants is feasible.

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Coherency in neutrino-nucleus elastic scattering

Cited by 58 publications

References 23 publications

Discovery potential of multiton xenon detectors in neutrino electromagnetic properties

Discovery potential of multiton xenon detectors in neutrino electromagnetic properties

Coherency and incoherency in neutrino-nucleus elastic and inelastic scattering

The $$\nu $$ ν -cleus experiment: a gram-scale fiducial-volume cryogenic detector for the first detection of coherent neutrino–nucleus scattering

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