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

For the detection of direct dark matter, in order to extract useful information about the funda- mental interactions from the data, it is crucial to properly determine the nuclear form factor. The form factor for the spin-independent cross section of collisions between dark matter particles and the...

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Published inChinese physics C Vol. 36; no. 6; pp. 505 - 512
Main Author 陈亚正 谌俊谋 罗延安 申虹 李学潜
Format Journal Article
LanguageEnglish
Published 01.06.2012
Subjects
Collisions
Cross sections (physics)
Dark matter
Deformation
Ellipticity
Form factors
Nuclear deformation
Nuclei
原子核
暗物质粒子
核变形
球对称
直接探测
相互作用
碰撞截面
随机取向
Online AccessGet full text
ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/36/6/005

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Summary:For the detection of direct dark matter, in order to extract useful information about the funda- mental interactions from the data, it is crucial to properly determine the nuclear form factor. The form factor for the spin-independent cross section of collisions between dark matter particles and the nucleus has been thoroughly studied by many authors. When the analysis was carried out, the nuclei were always supposed to be spherically symmetric. In this work, we investigate the effects of the deformation of nuclei from a spherical shape to an ellipticM one on the form factor. Our results indicate that as long as the ellipticity is not too large, such deformation will not cause any substantial effects. In particular, when the nuclei are randomly orientated in room-temperature circumstances, one can completely neglect them.
Bibliography:nuclear density, dark matter
11-5641/O4
CHEN Ya-Zheng CHEN Jun-Mou LUO Yan-An SHEN Hong LI Xue-Qian School of Physics, Nankai University, Tianjin 300071, China
For the detection of direct dark matter, in order to extract useful information about the funda- mental interactions from the data, it is crucial to properly determine the nuclear form factor. The form factor for the spin-independent cross section of collisions between dark matter particles and the nucleus has been thoroughly studied by many authors. When the analysis was carried out, the nuclei were always supposed to be spherically symmetric. In this work, we investigate the effects of the deformation of nuclei from a spherical shape to an ellipticM one on the form factor. Our results indicate that as long as the ellipticity is not too large, such deformation will not cause any substantial effects. In particular, when the nuclei are randomly orientated in room-temperature circumstances, one can completely neglect them.
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ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/36/6/005