⚝ Introduction
Dark matter is
among a few important science drivers
that push forward our knowledge boundary of the fundamental building
blocks of Nature and their interactions. Benefited with huge fluxes,
produced either naturally or artificially, and massive detectors of
ever-improving sensitivities, their direct detection, and hopefully
new discovery, has been taking an important position in the
"intensity" frontier of our search for new physics.
Unlike the "energy" frontier which relies on powerful colliders, most
intensity frontier experiments are conducted at much lower energies
which can overlap with typical nuclear, atomic, molecular, or
condensed-matter scales. Our collaboration grows out of the common
interest in various many-body problems therein. Through detailed study
of many-body physics, our goal is to better understand the detector
responses so that experimental data can be analyzed reliably, and to
identify from the rich energy spectra of many-body systems useful
detector designs with unique signatures, improved precisions, or
enhanced signals.
⚝ Group Members
Members
Department of Physics, National Taiwan University, Taipei 10617, Taiwan
✉ Email - jwc@phys.ntu.edu.tw 🌐 Institute Webpage iNSPIRE Google Scholar
Department of Physics, National Dong Hwa University, Shoufeng, Hualien 97401, Taiwan
✉ Email - hsinchang@mail.ndhu.edu.tw 🌐 Institute Webpage
Department of Physics, National Dong Hwa University, Shoufeng, Hualien 97401, Taiwan
✉ Email - cpliu@mail.ndhu.edu.tw 🌐 Institute Webpage
Department of Physics, National Taiwan University, Taipei 10617, Taiwan
✉ Email - mkpandey@gmail.com 🌐 Personal Webpage
D´epartement de physique, Universit´e de Montr´eal, Montr´eal H3C 3J7, Canada
✉ Email - jpw750811@gmail.com 🌐 Personal Webpage
Adjoint members @TEXONO
Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
✉ Email - htwong@phys.sinica.edu.tw 🌐 Institute Webpage
Department of Physics, Central University of South Bihar, Gaya 824236, India
✉ Email - lakhwinderhep@gmail.com 🌐 Institute Webpage
⚝ Recent Works
⚝ Publications
[17] Many-body atomic response functions of xenon and germanium for leading-order sub-GeV dark matter-electron interactions in effective field theory, TEXONO Collaboration
C.-P. Liu, Mukesh K. Pandey, Lakhwinder Singh, Chih-Pan Wu, Jiunn-Wei Chen, Hsin-Chang Chi,
Henry T. Wong (2024)
DOI
[16] Dark Matter Annual Modulation Analysis with Combined Nuclear and Electron Recoil Channels
H.B. Li, M.K. Pandey, C.H. Leung, L. Singh, H.T. Wong, H.-C. Chi, M. Deniz, Greeshma C., J.-W. Chen, H.C. Hsu, S. Karadag,
S. Karmakar, V. Kumar, J. Li, F.K. Lin, S.T. Lin, C.-P. Liu, S.K. Liu, H. Ma, D.K. Mishra, K. Saraswat, V. Sharma,
M.K. Singh, M.K. Singh, V. Singh, D. Tanabe, J.S. Wang, C.-P. Wu, L.T. Yang, C.H. Yeh, Q. Yue
arXiv:2412.04916 (2024)
DOI
[15] Inverse Primakoff scattering for axionlike particle couplings,
C.-P. Wu, C.-P. Liu, L. Singh, Greeshma C. J.-W. Chen, H.-C. Chi, M.K. Pandey, H.T. Wong
Phys. Rev. D 108, 043029 (2023)
DOI
[14] Spin-dependent dark matter-electron interactions,
C.-P. Liu, Chih-Pan Wu, Jiunn-Wei Chen, Hsin-Chang Chi, Mukesh K. Pandey, Lakhwinder Singh,
Henry T. Wong arXiv:2106.16214 (2021)
(2021) DOI
[13] Model-independent determination of the Migdal effect via photoabsorption, C.-P.
Liu, Chih-Pan Wu, Hsin-Chang Chi, ,
Jiunn-Wei Chen, Phys. Rev. D 102, 121303(R) (2021)
DOI
[12] Studies of quantum-mechanical coherency effects in neutrino-nucleus elastic
scattering,
V. Sharma, L. Singh, H. T. Wong, M. Agartioglu, J.-W. Chen, M. Deniz, S. Kerman, H. B. Li, C.-P.
Liu, K. Saraswat, M. K. Singh, and V. Singh (TEXONO Collaboration)
Phys. Rev. D 103, 092002 (2021)
DOI
[11] Constraints from a many-body method on spin-independent dark matter scattering off
electrons using data from
germanium and xenon detectors, Mukesh K. Pandey, Lakhwinder Singh, Chih-Pan Wu, Jiunn-Wei Chen,
Hsin-Chang Chi,
Chung-Chun Hsieh, C.-P. Liu, and Henry T. Wong., Phys. Rev. D 102, 123025 (2020)
DOI
[10] Discovery potential of multiton xenon detectors in neutrino electromagnetic
properties,
Chung-Chun Hsieh, Lakhwinder Singh, Chih-Pan Wu, Jiunn-Wei Chen, Hsin-Chang Chi, C.-P. Liu, Mukesh
K. Pandey, and Henry T. Wong Phys. Rev. D 100, 073001 (2019)
DOI
[9] Constraints on millicharged particles with low threshold germanium detectors at
Kuo-Sheng Reactor Neutrino Laboratory,
L. Singh, J. W. Chen, H. C. Chi, C.-P. Liu, M. K. Pandey, H. T. Wong, C. P. Wu, M. Agartioglu, M.
Deniz,
H. B. Li, S. T. Lin, V. Sharma, M. K. Singh, V. Singh, and Q. Yue (TEXONO Collaboration),
Phys. Rev. D 99, 032009 (2019)
DOI
[8] Low-energy electronic recoil in xenon detectors by solar neutrinos, Jiunn-Wei Chen,
Hsin-Chang Chi, C.-P. Liu, Chih-Pan Wu (2017)
DOI
[7] Atomic ionization by sterile-to-active neutrino conversion and constraints on dark
matter sterile neutrinos with germanium detectors,
Jiunn-Wei Chen, Hsin-Chang Chi, Shin-Ted Lin, C.-P. Liu, Lakhwinder Singh, Henry T. Wong, Chih-Liang
Wu, and Chih-Pan Wu,
Phys. Rev. D 93, 093012 (2016)
DOI
[6] Coherency in neutrino-nucleus elastic scattering,
S. Kerman, V. Sharma, M. Deniz, H. T. Wong, J.-W. Chen, H. B. Li, S. T. Lin, C.-P. Liu, and Q. Yue
(TEXONO Collaboration)
Phys. Rev. D 93, 113006 (2016)
DOI
[5] Electronic and nuclear contributions in sub-GeV dark matter scattering: A case study
with hydrogen,
Jiunn-Wei Chen, Hsin-Chang Chi, C.-P. Liu, Chih-Liang Wu, and Chih-Pan Wu,
Phys. Rev. D 92, 096013 (2015)
DOI
[4] Constraining neutrino electromagnetic properties by germanium detectors,
Jiunn-Wei Chen, Hsin-Chang Chi, Keh-Ning Huang, Hau-Bin Li, C.-P. Liu, Lakhwinder Singh, Henry T.
Wong, Chih-Liang Wu, and Chih-Pan Wu,
Phys. Rev. D 91, 013005 (2015)
DOI
[3] Constraints on millicharged neutrinos via analysis of data from atomic ionizations
with germanium detectors at sub-keV
sensitivities,
Jiunn-Wei Chen, Hsin-Chang Chi, Hau-Bin Li, C.-P. Liu, Lakhwinder Singh, Henry T. Wong, Chih-Liang
Wu, and Chih-Pan Wu,
Phys. Rev. D 90, 011301(R) (2014)
DOI
[2] Atomic ionization of germanium by neutrinos from an ab initio approach,
Hsin-Chang Chi, Keh-Ning Huang, C.-P. Liu, Hao-Tse Shiao, Lakhwinder Singh, Henry T.Wong, Chih-Liang
Wu, Chih-Pan Wu,
Physics Letters B, Volume 731 (2014)
DOI
[1] Ionization of hydrogen by neutrino magnetic moment, relativistic muon, and WIMP,
Jiunn-Wei Chen, C.-P. Liu, Chien-Fu Liu, and Chih-Liang Wu,
Phys. Rev. D 88, 033006 (2013)
DOI
⚝ Atomic Responses and Computational Tools
✧ Atomic Response Functions
(arXiv:2501.04020 )We provide detailed data on four types of atomic response functions:
- Charge (C)
- Axial Longitudinal (L5)
- Axial Transverse Electric (E5)
- Axial Transverse Magnetic (M5)
- (MC)RRPA - Multi-Configuration Relativistic Random Phase Approximation (ab initio method).
- RFCA - Relativistic Frozen Core Approximation.
✧ Computational Tools
Our computational resources include C and Mathematica codes designed to calculate Differential Count Rates"dR/dT"(DCR). These codes utilize a database of response functions and support both Short-Range (SR) and Long-Range (LR) interaction models.
Two computational approaches are provided, as detailed in PhysRevD.102.123025, PhysRevD.106.063003 arXiv:2501.04020
- Double Integration Approach: Computes Differential Count Rates"dR/dT" through numerical double integration.
- Mean Inverse Speed function Approach: Camputes Differential Count Rates"dR/dT" using the Mean inverse speed function.
Short-Range Interactions (SR):
- Differential Count Rates"dR/dT" Computes using Mean inverse speed function Approach
- Differential Count Rates"dR/dT" Computes using Double Integration Approach
- Differential Count Rates"dR/dT" Computes using Mean inverse speed function Approach
- Differential Count Rates"dR/dT" Computes using Double Integration Approach
➸ C Code
Short Range Interaction Long Range Interaction➸ Mathematica Code
Short Range Interaction Long Range Interaction✧ Explore and Download
Dive into our Atomic Response Data and Computational Tools to accelerate your research. For more details, refer to the published work arXiv:2501.04020
⚝ Other Collaborators
Members
Prof. Keh-Ning Huang
Prof. Hau-Bin Li
Prof. Shin-Ted Lin
Prof. Hao-Tse Shiao
Former Students
Chien-Fu Liu (2012 NTU MS)
Chih-Liang Wu (2014 NTU MS, 2020 MIT Ph. D)
Chih-Pan Wu (2017 NTU Ph. D, 2018 NTU postdoc, 2019 Montreal postdoc)
Chung-Chun Hsieh (2021 NTU MS, 2021- U. of Maryland, Ph. D program)