Determining Nuclear Form factor for Detection of Dark Matter in Relativistic Mean Field Theory

In the evaluation of weak interacting massive particles (WIMPs) detection rates, the WIMPnucleus cross section is commonly described by using form factors extracted from charge distributions. In this work, we use different proton and neutron distributions taken from Hartree-Fock calculations. We study the effects of this choice on the total detection rates for six nuclei with different neutron excess, and taken from different regions of the nuclear chart. The use of different distributions for protons and neutrons becomes more important if isospin-dependent WIMP-nucleon interactions are considered. The need of distinct descriptions of proton and neutron densities reduces with the lowering of the detection energy thresholds.

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“…A work based on these ideas, and carried out within a relativistic-Hartree framework, has been proposed in Ref. [10].…”

Section: Introductionmentioning

confidence: 99%

Nuclear proton and neutron distributions in the detection of weak interacting massive particles

Có

Donno

Anguiano

et al. 2012

J. Cosmol. Astropart. Phys.

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“…The short dashed-dotted (green) line corresponds to the spherical form of the nucleus. For the spherical nucleus, it has already been known that the form factor obtained with the 2PF model is very close to that determined by the folding model [19]. Thus we will also make a comparison between the E2PF and EF form factors at the end of the paper.…”

Section: Extension Of the Folding Model (Ef)mentioning

confidence: 69%

“…A number of models have been proposed [18,19] to describe the nuclear charge density or mass density. Among them, the two-parameter Fermi distribution (2PF) is one of the simplest models.…”

Section: Extension Of the Two-parameter Fermi Distribution (E2pf)mentioning

confidence: 99%

Effects of nuclear deformation on the form factor for direct dark matter detection

Chen¹,

Chen²,

Luo³

et al. 2012

Chinese Phys. C

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For direct dark matter detections, to extract useful information about the fundamental interaction from data, it is crucial to properly determine the nuclear form factor. The form factor for spinindependent cross section of collisions between dark matter particle and nucleus is thoroughly studied by many authors. When the analysis was carried out, the nuclei are always supposed to be spherically symmetric. In this work, we investigate the effects of deformation of nuclei from a spherical shape to an elliptical shape on the form factor. Our results indicate that as long as the ellipticity is not too large, such effects cannot cause any substantial effects, especially as the nuclei are randomly orientated in a room temperature circumstance one can completely neglect them.

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“…where Z is the proton number, A−Z the neutron number, f p and f n are the coupling factors. The nuclear form factor can be defined as [35]…”

Section: Nuclear Form Factormentioning

confidence: 99%

Calculated WIMP signals at the ANDES laboratory: comparison with northern and southern located dark matter detectors

Civitarese¹,

Fushimi²,

Mosquera³

2016

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

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In this work we have analyzed the DAMA-LIBRA modulation data considering that the interactions between the WIMP and the Na and/or I nucleus of the detector and the Ge-type detector. We have made predictions to observation of modulation for the future laboratory to be built in San Juan, Argentina, if the detector is either a NaI detector or a Ge detector. We have found that the annual modulation does not change but, the diurnal modulation is modified by a factor 1.17 or 1.29 at the maximum value for a NaI or Ge detector respectively.

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Determining Nuclear Form factor for Detection of Dark Matter in Relativistic Mean Field Theory

Cited by 11 publications

References 40 publications

Nuclear proton and neutron distributions in the detection of weak interacting massive particles

Nuclear proton and neutron distributions in the detection of weak interacting massive particles

Effects of nuclear deformation on the form factor for direct dark matter detection

Calculated WIMP signals at the ANDES laboratory: comparison with northern and southern located dark matter detectors

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