The COHERENT Experiment at the Spallation Neutron Source

Collaboration, COHERENT; Akimov, D.; An, P.; Awe, C.; Barbeau, P. S.; Barton, P.; Becker, B.; Belov, V.; Bolozdynya, A.; Burenkov, A.; Cabrera-Palmer, B.; Collar, J. I.; Cooper, R. J.; Cooper, R. L.; Cuesta, C.; Dean, D.; Detwiler, J.; Dolgolenko, A.; Efremenko, Y.; Elliott, S. R.; Etenko, A.; Fields, N.; Fox, W.; Galindo-Uribarri, A.; M., Green,; Heath, M.; Hedges, S.; Hornback, D.; Iverson, E. B.; Kaufman, L.; Klein, S. R.; Khromov, A.; Konovalov, A.; Kovalenko, A.; Kumpan, A.; Leadbetter, C.; L., Li,; Lu, W.; Melikyan, Y.; Markoff, D.; Miller, K.; Middlebrook, M.; P., Mueller,; Naumov, P.; Newby, J.; Parno, D.; Penttila, S.; Perumpilly, G.; Radford, D.; Ray, H.; Raybern, J.; Reyna, D.; Rich, G. C.; Rimal, D.; Rudik, D.; Scholberg, K.; Scholz, B.; Snow, W. M.; Sosnovtsev, A.; Shakirov, A.; Suchyta, S.; Suh, B.; Tayloe, R.; Thornton, R. T.; A., Tolstukhin,; Vetter, K.; Yu, C. H.

doi:10.48550/arxiv.1509.08702

Cited by 27 publications

(37 citation statements)

References 66 publications

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“…The first experimental evidence for coherent neutrinonucleus scattering was reported in 2017 by the COHERENT Collaboration [59][60][61], using CsI[Na] scintillator exposed to neutrinos with energies of tens of MeV produced by the Spallation Neutron Source (SNS) at the Oak Ridge National Laboratory [62][63][64].…”

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confidence: 99%

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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confidence: 99%

Coherency and incoherency in neutrino-nucleus elastic and inelastic scattering

2018

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“…where G F is the Fermi constant, L µ the lepton current, and J µ is the hadron current inside the nucleus. Experimental efforts have been developed in the detection of CENNS, some of them represented by large scientific collaborations namely, COHERENT [8,11], CONNIE [12] and TEXONO [13], among others. As mentioned before, after decades of searching only recently the COHERENT Collaboration [8] announced the first irrefutable detection of CENNS.…”

Section: The Main Characteristic Of Cennsmentioning

confidence: 99%

Searching signature of neutrino-nucleus coherent scattering with Mössbauer Spectroscopy

Marques

Dias

Sanchez³

et al. 2019

J. Phys.: Conf. Ser.

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The Mössbauer spectroscopy is presented as an alternative experimental technique to be pursued in the detection of Coherent Elastic ν-Nucleus Scattering (CENNS). The neutrino transferred energy in the neutrino-nucleus interaction causes a perturbation at the nuclear levels which are responsible for gamma radiation in Mössbauer resonance. The main characteristic of Mössbauer spectroscopy is the recoil less condition imposed on the nuclei imposed by quantum restrictions of the crystalline array potential. Coherent neutrino scattering is expected to occurs low energy regime of the beam, typically below 30 MeV, at higher neutrino energies small incoherence component appears in the scattering[30] as disturbances within the internal nuclear degrees of freedom. In this work we have shown that using anti neutrino reactor beam, with the accuracy of Mössbauer technique its possible to obtain a measurable signature of the Coherent neutrino Scattering.

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“…The COHERENT collaboration [3] uses the Spallation Neutron Source at Oak Ridge to test coherent elastic neutrino-nucleus scattering (CEνNS) on several nuclei. So far, results from the CsI[Na] and Ar targets have been reported in [2,4], but Ge and NaI [Tl] targets are planned for the future.…”

Section: Introductionmentioning

confidence: 99%

“…Parameters used in the calculation for the four detectors[3,23]. There is a 10% uncertainty in neutrino flux aside from the uncertainties listed in the table.…”

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confidence: 99%