Experimental 
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 response of 
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 as a benchmark for neutrino-nucleus scattering calculations

Gayer, U.; Beck, T.; Bhike, M.; Isaak, J.; Pietralla, N.; Ries, P.; Savran, D.; Schilling, Marcel P.; Tornow, W.; Werner, V.

doi:10.1103/physrevc.100.034305

Cited by 8 publications

(5 citation statements)

References 81 publications

(228 reference statements)

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“…The magnetic dipole (M1) excitation provides one fundamental, measurable response of atomic nuclei, and has attracted various interests regarding the role of the SO splitting as well as the so-called residual interactions for the M1 observables [16][17][18][19][20][21][22][23][24][25][26]. In basic knowledge, the M1 transition in the leading one-body operator level would take place between the SO-partner orbits [1,16,17,27], if the independent SP picture was a good approximation.…”

Section: Introductionmentioning

confidence: 99%

Role of residual interaction in the relativistic description of M1 excitation

Oishi¹,

Kružić²,

Paar³

2020

J. Phys. G: Nucl. Part. Phys.

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Magnetic dipole (M1) excitation is the leading mode of multi-nucleon excitations induced by the magnetic field, and is a phenomenon of the spin–orbit splitting and residual interactions involved. In this work, we investigate the effects of the residual interactions on the M1 excitation from a novel perspective, the framework of relativistic nuclear energy-density functional. The relativistic Hartree–Bogoliubov model is utilized to determine the nuclear ground state properties, while the relativistic quasi-particle random-phase approximation is employed for the description of M1-excitation properties. From the analysis of M1 mode in the Ca isotope chain, role of the isovector–pseudovector residual interaction is discussed. For open-shell nuclei, the pairing correlation also plays a noticeable role in the M1 mode. The experimental data on M1 mode is expected to provide a suitable reference to improve and optimize the theoretical models to describe the residual interactions.

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Section: Introductionmentioning

confidence: 99%

Role of residual interaction in the relativistic description of M1 excitation

Oishi¹,

Kružić²,

Paar³

2020

J. Phys. G: Nucl. Part. Phys.

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“…9 See [183][184][185] for a recent discussion of neutrino neutral-current cross sections on 40 Ar producing an excited state of the nucleus.…”

Section: Cross Sections and Uncertainties For A Monoenergetic Sourcementioning

confidence: 99%

Flavor-dependent radiative corrections in coherent elastic neutrino-nucleus scattering

Tomalak

Machado

Pandey

et al. 2021

J. High Energ. Phys.

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We calculate coherent elastic neutrino-nucleus scattering cross sections on spin-0 nuclei (e.g. 40Ar and 28Si) at energies below 100 MeV within the Standard Model and account for all effects of permille size. We provide a complete error budget including uncertainties at nuclear, nucleon, hadronic, and quark levels separately as well as perturbative error. Our calculation starts from the four-fermion effective field theory to explicitly separate heavy-particle mediated corrections (which are absorbed by Wilson coefficients) from light-particle contributions. Electrons and muons running in loops introduce a non- trivial dependence on the momentum transfer due to their relatively light masses. These same loops, and those mediated by tau leptons, break the flavor universality because of mass-dependent electromagnetic radiative corrections. Nuclear physics uncertainties significantly cancel in flavor asymmetries resulting in subpercent relative errors. We find that for low neutrino energies, the cross section can be predicted with a relative precision that is competitive with neutrino-electron scattering. We highlight potentially useful applications of such a precise cross section prediction ranging from precision tests of the Standard Model, to searches for new physics and to the monitoring of nuclear reactors.

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“…Using the results of previous experiments on 40 Ar [27,28], the effect of the target length could be appropriately benchmarked. In these experiments, a target of pressurized 40 Ar of length 12 cm and radius 6 cm was exploited in NRF measurements while the detector radius was 32 mm.…”

Section: Benchmarking Against Experimental Datamentioning

confidence: 99%

“…Shizuma et al [1] have recently assigned the spin and parity of the 2.982 and 3.004 MeV levels of 27 Al. The first level was assigned to be M1 transition via a spin sequence of 5 2 → 3 2 → 5 2 with A Exp (π/2) = 0.02 (5).…”

Section: Benchmarking Against Experimental Datamentioning

confidence: 99%

Monte Carlo Simulation of γ − γ Correlation Functions

Omer

Bakr

2020

Atoms

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γ − γ correlation functions are mathematical expressions that describe the angular distribution of cascade γ -rays emitted from an atomic nucleus. Cascade transitions may occur in either a two-step deexcitation or through an excitation-deexcitation process of a particular energy level inside the nucleus. In both cases, the nucleus returns to its ground energy state. Spin and parity of the excited state can be determined experimentally using the asymmetry of the angular distribution of the emitted radiation. γ − γ correlation functions are only valid for point-like targets and detectors. In the real experiments, however, neither the target nor the detector is point-like. Thus, misassignment of the spin-parity of energy levels may easily take place if only the analytical equations are considered. Here, we develop a new Monte Carlo simulation method of the γ − γ correlation functions to account for the extended target and detector involved in spin-parity measurements using nuclear resonance fluorescence of nuclei. The proposed simulation tool can handle arbitrary geometries and spin sequences. Additionally, we provide numerical calculations of a parametric study on the influence of the detection geometry on the angular distribution of the emitted γ -rays. Finally, we benchmark our simulation by comparing the simulation-estimated asymmetry ratios with those measured experimentally. The present simulation can be employed as a kernel of an implementation that simulates the nuclear resonance fluorescence process.

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Experimental M1 response of Ar40 as a benchmark for neutrino-nucleus scattering calculations

Cited by 8 publications

References 81 publications

Role of residual interaction in the relativistic description of M1 excitation

Role of residual interaction in the relativistic description of M1 excitation

Flavor-dependent radiative corrections in coherent elastic neutrino-nucleus scattering

Monte Carlo Simulation of γ − γ Correlation Functions

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