Effects of nuclear deformation on the form factorfor direct dark matter detection

CHEN Ya-Zheng; CHEN Jun-Mou; LUO Yan-An; SHEN Hong; LI Xue-Qian

doi:10.1088/1674-1137/36/6/005

Chinese Physics C> 2012, Vol. 36> Issue(6) : 505-512 DOI: 10.1088/1674-1137/36/6/005

Effects of nuclear deformation on the form factorfor direct dark matter detection

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Abstract：
For the detection of direct dark matter, in order to extract useful information about the fundamental 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 elliptical 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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CHEN Ya-Zheng, CHEN Jun-Mou, LUO Yan-An, SHEN Hong and LI Xue-Qian. Effects of nuclear deformation on the form factorfor direct dark matter detection[J]. Chinese Physics C, 2012, 36(6): 505-512. doi: 10.1088/1674-1137/36/6/005

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Received: 2011-12-12
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Effects of nuclear deformation on the form factorfor direct dark matter detection

Corresponding author: CHEN Ya-Zheng,

Received Date: 2011-12-12
Accepted Date: 1900-01-01
Available Online: 2012-06-05

Abstract: For the detection of direct dark matter, in order to extract useful information about the fundamental 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 elliptical 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.