Wavefield Decomposition by 3-D/3-C Inversion Process in Tau-P Domain

Blanco, Jacques; Canadas, Guy

doi:10.3997/2214-4609-pdb.6.p103

Cited by 5 publications

(4 citation statements)

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“…One can conclude that the COHERENT experiment (with 133 Cs) has seen a very substantial part of Coherent Elastic Neutrino Nucleus Scattering (CEνNS), but with 15-20% uncertainty, due to the high neutrino energy and the high energy threshold (5 keV excitation γs escape detection. An accurate analysis of the COHERENT-like data (see for example [73][74][75][76][77][78][79][80][81][82][83]) should take the incoherent contribution into account. There are two ways for an accurate study of the CEνNS.…”

Section: Arxiv:190403119v1 [Hep-ph] 5 Apr 2019mentioning

confidence: 99%

On Coherent Neutrino and Antineutrino Scattering off Nuclei

Bednyakov

Naumov

2019

Phys. Part. Nuclei Lett.

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Neutrino-nucleus νA → νA and antineutrino-nucleusνA →νA interactions, when the nucleus conserves its integrity, are discussed with coherent (elastic) and incoherent (inelastic) scattering regimes taken into account. In the first regime the nucleus remains in the same quantum state after the scattering and the cross-section depends on the quadratic number of nucleons. In the second regime the nucleus changes its quantum state and the cross-section has an essentially linear dependence on the number of nucleons. The coherent and incoherent cross-sections are driven by a nuclear nucleon form-factor squared |F | 2 term and a (1−|F | 2 ) term, respectively. One has a smooth transition between the regimes of coherent and incoherent (anti)neutrino-nucleus scattering. Due to the neutral current nature these elastic and inelastic processes are indistinguishable if the nucleus recoil energy is only observed. One way to separate the coherent signal from the incoherent one is to register γ quanta from deexcitation of the nucleus excited during the incoherent scattering. Another way is to use a very low-energy threshold detector and collect data at very low recoil energies, where the incoherent scattering is vanishingly small. In particular, for 133 Cs and neutrino energies of 30-50 MeV the incoherent cross-section is about 15-20% of the coherent one. Therefore, the COHERENT experiment (with 133 Cs) has measured the coherent elastic neutrino nucleus scattering (CEνNS) with the inelastic admixture at a level of 15-20%, if the excitation γ quantum escapes its detection.After Freedman's paper [1] it was confirmed [2-5] that in the Standard Model the cross-section of elastic neutrino scattering off a nucleus is enhanced with respect to neutrino scattering off a single nucleon. The amplification factor for a spinless even-evenHere T A is the kinetic energy of the scattered nucleus, m A is the nucleus mass, q is the momentum transfer, G F is the Fermi constant, Z and N are the numbers of protons and neutrons, g p/n V are the proton/neutron couplings of the nucleon vector current, and F p/n (q) are the proton/neutron form-factors of the nucleus. The form-factors vanish as |q| → ∞ and approach unity (F p/n (q) = 1) if |q|R A 1, where R A is the radius of the nucleus. The coherency requirement reads as |q|R 1. Freedman used the termin "coherent neutrino-nucleus scattering" (CNNS) [1] to emphasize the fact that the dependence of the corresponding cross-section is quadratic in terms of the number of nucleons.The importance of the CNNS was demonstrated for a number of observables in astrophysics, like stellar collapse [13,14], and Supernovae [12,[15][16][17], in studies of physics beyond the Standard Model (SM) [3,11,[18][19][20][21][22][23][24][25][26][27][28], and in investigation of the nuclear structure [4,[29][30][31][32][33]. Due to the neutral-current nature an observation of ν-oscillations with CNNS could be evidence for sterile neutrino(s) [34,35]. Coherent scattering off atomic systems was studied in [36,37]. There are some expe...

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Section: Arxiv:190403119v1 [Hep-ph] 5 Apr 2019mentioning

confidence: 99%

On Coherent Neutrino and Antineutrino Scattering off Nuclei

Bednyakov

Naumov

2019

Phys. Part. Nuclei Lett.

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“…The data also provide novel constraints on new physics that manifests through the neutrino sector, including generalized scalar and vector neutrino interactions [12], as well as hidden sector models [13]. It also sets independent constraints on the effective neutron size distribution of CsI [14][15][16], and on sterile neutrinos [17,18]. Low mass mediator models are particularly interesting since there are no Large Hadron Collider (LHC) constraints for mediator masses < ∼ GeV, and these models connect to new ideas associated with sub-GeV dark matter in the range MeV to GeV [19].…”

Section: Introductionmentioning

confidence: 99%

Searching for Beyond the Standard Model Physics with COHERENT Energy and Timing Data

et al. 2019

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We search for beyond the Standard Model (BSM) physics by combining COHERENT energy and timing data. Focusing on light, < ∼ GeV mediators, we find the data favor a ∼ 10 − 1000 MeV mediator as compared to the Standard Model (SM) best fit at the < ∼ 2σ level. The best-fit coupling range is g ∼ 10 −5 − 10 −3 . The timing data provides statistical information on the neutrino flavor distributions that is not attainable from the nuclear recoil energies alone. This result accounts for uncertainty in the effective size of the neutron distribution, and highlights the power of including uncertainties on experimental backgrounds, nuclear structure, and BSM physics.

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“…In this work, for the NSI analysis, we study both non-universal and flavor changing NSI parameters. Different authors have already studied part of the potential of these detectors in a different context [11][12][13][14][15][16]. Here we focus on the specific configurations reported by the COHERENT collaboration for its future stages [10] to have a complementary forecast that includes cases that have not been covered, such as the future perspectives for the measurement of a weak mixing angle for these detectors.…”

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confidence: 99%

Coherent Elastic Neutrino-Nucleus Scattering as a Precision Test for the Standard Model and Beyond: The COHERENT Proposal Case

Miranda

Garcia

Sanders

2019

Advances in High Energy Physics

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Several experimental proposals expect to confirm the recent measurement of the coherent elastic neutrino-nucleus scattering (CEvNS). Motivated in particular by the next generation experiments of the COHERENT collaboration, we study their sensitivity to different tests of the Standard Model and beyond. We analyze the resolution that can be achieved by each future proposed detector in the measurement of the weak mixing angle; we also perform a similar analysis in the context of Non-Standard Interaction (NSI) and in the case of oscillations into a sterile neutrino state. We show that future perspectives are interesting for these types of new physics searches. I. INTRODUCTIONDespite the coherent elastic neutrino-nucleus scattering (CEvNS) was proposed more than forty years ago [1], it was only recently that the COHERENT collaboration observed this process for the first time by using a CsI[Na] detector exposed to the neutrino flux generated at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory [2].In a CEvNS process, an incident neutrino interacts coherently with the protons and neutrons within the nucleus. As a result, there is an enhancement in the cross-section, which turns out to be quadratic in the number of nucleons. The necessary condition to observe this phenomenon is that the energy of the neutrino must be sufficiently low so that the momentum transfer satisfies qR << 1, with R the nuclear radius. Since its first

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Wavefield Decomposition by 3-D/3-C Inversion Process in Tau-P Domain

Cited by 5 publications

References 0 publications

On Coherent Neutrino and Antineutrino Scattering off Nuclei

On Coherent Neutrino and Antineutrino Scattering off Nuclei

Searching for Beyond the Standard Model Physics with COHERENT Energy and Timing Data

Coherent Elastic Neutrino-Nucleus Scattering as a Precision Test for the Standard Model and Beyond: The COHERENT Proposal Case

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