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Journal of High Energy Physics

, 2019:149 | Cite as

The wavefunction reconstruction effects in calculation of DM-induced electronic transition in semiconductor targets

  • Zheng-Liang LiangEmail author
  • Lin Zhang
  • Ping Zhang
  • Fawei Zheng
Open Access
Regular Article - Experimental Physics
  • 22 Downloads

Abstract

The physics of the electronic excitation in semiconductors induced by sub-GeV dark matter (DM) have been extensively discussed in literature, under the framework of the standard plane wave (PW) and pseudopotential calculation scheme. In this paper, we investigate the implication of the all-electron (AE) reconstruction on estimation of the DM-induced electronic transition event rates. As a benchmark study, we first calculate the wavefunctions in silicon and germanium bulk crystals based on both the AE and pseudo (PS) schemes within the projector augmented wave (PAW) framework, and then make comparisons between the calculated excitation event rates obtained from these two approaches. It turns out that in process where large momentum transfer is kinetically allowed, the two calculated event rates can differ by a factor of a few. Such discrepancies are found to stem from the high-momentum components neglected in the PS scheme. It is thus implied that the correction from the AE wavefunction in the core region is necessary for an accurate estimate of the DM-induced transition event rate in semiconductors.

Keywords

Dark matter Dark Matter and Double Beta Decay (experiments) 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Copyright information

© The Author(s) 2019

Authors and Affiliations

  • Zheng-Liang Liang
    • 1
    Email author
  • Lin Zhang
    • 2
    • 3
  • Ping Zhang
    • 1
  • Fawei Zheng
    • 1
  1. 1.Institute of Applied Physics and Computational MathematicsBeijingP.R. China
  2. 2.School of Physical SciencesUniversity of Chinese Academy of SciencesBeijingP.R. China
  3. 3.CAS Key Laboratory of Theoretical Physics, Institute of Theoretical PhysicsChinese Academy of SciencesBeijingP.R. China

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