Lakhwinder Singh

Neutrino and dark matter are the two important portals to explore the new physics beyond the Standard Model of particle physics. Detectors with sub-keV threshold, low internal radioactive contamination, compact kg-scale mass and excellent energy resolution can significantly enhance sensitivities on several important research programs in neutrino and dark matter physics. The principal goal of our group is to develop a sub-keV sensitive threshold detector to study the low energy reactor neutrinos and dark matter physics. We are actively participating in the research program TEXONO (Taiwan Experiment On NeutrinO), Taiwan; China Dark Mater EXperiment (CDEX), China and INO ( India-based Neutrino Observatory). Our group works in the field of Low Energy Neutrino Physics, Dark Matter Physics, Detector Development, and Data Acquisition System. The research program on low energy neutrino interactions at the “Kuo-ShengNeutrino Laboratory (KSNL)” with TEXONO Collaboration, achieved world-recognized results on neutrino magnetic moment, neutrino millicharged, the measurements of the neutrino-electron cross-section and electro-weak parameters in new (MeV) momentum-transfer regions, as well as low mass dark matter searches. We are proficient in both detector hardware and data analysis software. Our significant contributions to advance the low-threshold germanium detector program, credited as key authors in several publications in peer-reviewed international journals like Phys. Rev. Letts., Phys. Rev. D, Physics Letters B, and Nucl. Instrum. Methods Phys. Res., A.

• Publications:
1. Constraints from a many-body method on spin-independent dark matter scattering of 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)
2. Exposure-background duality in the searches of neutrinoless double beta decay, M. K. Singh, H. T. Wong, L. Singh, V. Sharma, V. Singh, and Q. Yue Phys. Rev. D 101, 013006 (2020)
3. Direct Detection Constraints on Dark Photons with the CDEX-10 Experiment at the China Jin-ping Underground Laboratory, Z. She et al. (including L. Singh) (CDEX Collaboration) Phys. Rev. Lett. 124, 111301 (2020)
4. Improved limits on solar axions and bosonic dark matter from the CDEX-1B experiment using the profile likelihood ratio method, Y. Yang et al. (including L. Singh) (CDEX Collaboration) Phys. Rev. D 101, 052003 (2020)
5. Heat radiation reduction in cryostats with multilayer insulation technique, D. Singh, A. Pandey, M.K. Singh, L. Singh and V. Singh JINST 15, P07032 (2020)
6. Required sensitivity in the search of neutrinoless double beta decay in 124Sn, M. K. Singh, L. Singh, V. Sharma, M. K. Singh, A. Kumar, A. Pandey, V. Singh and H. T. Wong Indian Journal of Phys 94, 1263-1270 (2020)
7. Search for LightWeakly-Interacting-Massive-Particle Dark Matter by Annual Modulation Analysis with a Point-Contact Germanium Detector at the China Jinping Underground Laboratory, L. T. Yang et al. (including L. Singh) (CDEX Collaboration) Phys. Rev. Lett. 123, 221301 (2019)
8. Constraints on Spin-Independent Nucleus Scattering with sub-GeV Weakly Interacting Massive Particle Dark Matter from the CDEX-1B Experiment at the China Jinping Underground Laboratory, Z. Z. Liu et al. (including L. Singh) (CDEX Collaboration) Phys. Rev. Lett. 123, 161301 (2019)
9. 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)
10. Constraints on millicharged particles with with low-threshold germanium detectors at Kuo-Sheng Reactor Neutrino Laboratory, L. Singh* et al. (TEXONO Collaboration) Phys. Rev. D 99, 032009 (2019)
11. Constraints on bosonic dark matter with low threshold germanium detector at Kuo-Sheng reactor neutrino laboratory, Manoj Kumar Singh, Lakhwinder Singh, Mehmet Agartioglua, Vivek Sharma, Venktesh Singh and Henry Tsz-kingWong Chinese Journal of Physics 58, pp 63-73 (2019)
12. Performances of a prototype point-contact germanium detector immersed in liquid nitrogen for light dark matter search, Hao Jiang et al. (including L. Singh) (CDEX Collaboration) Sci. China-Phys. Mech. Astron. 62 (3), 031012 (2019).
13. Neutron background measurements with a hybrid neutron detector at the Kuo-Sheng Reactor Neutrino Laboratory, A. Sonay et al. (including L. Singh) (TEXONO Collaboration) Phys. Rev. C 98, 024602 (2018).
14. Characterization of the sub-keV Germanium detector, M. K. Singh et al. (including L. Singh) (TEXONO Collaboration) Indian J Phys 92(3):401{408 (2018)
15. Limits on Light Weakly Interacting Massive Particles from the First 102.8 kg _ day Data of the CDEX-10 Experiment, H. Jiang et al. (including L. Singh) (CDEX Collaboration) Phys. Rev. Lett. 120, 241301 (2018).
16. Limits on light WIMPs with a 1 kg-scale germanium detector at 160 eVee physics threshold at the China Jinping Underground Laboratory, L. T. Yang et al. (including L. Singh) (CDEX Collaboration) Chinese Physics C 42, 023002 (2018)
17. Bulk and surface event identi_cation in p-type germanium detectors, L. T. Yang et al. (including L. Singh) (TEXONO Collaboration) Nucl. Instrum. Methods Phys. Res., A 886 13-23 (2018)
18. Constraints on nonstandard intermediate boson exchange models from neutrino-electron scattering, B. Sevda et al. (including L. Singh) (TEXONO Collaboration) Phys. Rev. D 96, 035017 (2017)
19. Constraints on axion couplings from the CDEX-1 experiment at the China Jinping Underground Laboratory, S. K. Liu et al. (including L. Singh) (CDEX Collaboration) Phys. Rev. D 95, 052006 (2017)
20. Constraints on scalar-pseudoscalar and tensorial nonstandard interactions and tensorial unparticle couplings from neutrino-electron scattering, M. Deniz, B. Sevda, S. Kerman, A. Ajjaq, L. Singh, H. T. Wong, and M. Zeyrek Phys. Rev. D 95, 033008 (2017).
21. First results on 76Ge neutrinoless double beta decay from CDEX-1 experiment, Li Wang et al. (including L. Singh) (CDEX Collaboration) Sci. China Phys. Mech. Astron. 60, 071011 (2017)
22. Background rejection of TEXONO experiment to explore the sub-keV energy region with HPGe detector M.K. Singh et al. (including L. Singh) (TEXONO Collaboration) Indian J Phys 91, 1277-1291 (2017)
23. Design and performance of a hybrid fast and thermal neutron detector M.K. Singh et al. (including L. Singh) (TEXONO Collaboration) Nucl. Instrum. Methods Phys. Res., A 868 109-118 (2017).
24. . Characterization and performance of germanium detectors with sub- keV sensitivities for neutrino and dark matter experiments, A.K. Soma et al. (including L. Singh*) (TEXONO Collaboration) Nucl. Instrum. Methods Phys. Res., A 836 67-82 (2016).
25. 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).
26. Search of low-mass WIMPs with a p-type point contact germanium detector in the CDEX-1 experiment, Zhao. W et al. (including L. Singh) (CDEX Collaboration) Phys. Rev. D 93, 092003 (2016).
27. . Constraints on dark photon from neutrino-electron scattering experiments, S . Bilmis, I. Turan, T. M. Aliev, M. Deniz, L. Singh, and H. T. Wong Phys. Rev. D 92, 033009 (2015).
28. 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).
29. Study of the material photon and electron background and the liquid argon detector veto efficiency of the CDEX-10 experiment SU Jian et al. (including L. Singh) (CDEX Collaboration) Chinese Physics C Vol. 39, 036001, (2015).
30. 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).
31. Differentiation of bulk and surface events in p-type point-contact germanium detectors for light WIMP searches, H.B. Li et al. (including L. Singh) (TEXONO Collaboration) Astroparticle Physics 56, 1 (2014).
32. Atomic ionization of germanium due to neutrino magnetic moments, Jiunn-Wei Chen, Hsin-Chang Chi, Keh-Ning Huang, C.-P.Liu, Hao-Tse Shiao, Lakhwinder Singh, Henry T.Wong, Chih-Liang Wu and Chih-Pan Wu Physics Letters B 731, 159 (2014).
33. Limits on light weakly interacting massive particles from the CDEX-1 experiment with a p-type point-contact germanium detector at the China Jinping Underground Laboratory, Q. Yue et al. (including L. Singh) (CDEX Collaboration) Phys. Rev. D 90, 091701(R) (2014)
34. Limits on light WIMPs with a germanium detector at 177 eVee threshold at the China Jinping Underground Laboratory, S. K. Liu et al. (including L. Singh) (CDEX Collaboration) Phys. Rev. D 90, 032003 (2014)
35. Limits on Spin-Independent Couplings of WIMP Dark Matter with a p-type Point-Contact Germanium Detector, H.B. Li et al. (including L. Singh) (TEXONO Collaboration) Phys. Rev. Lett. 110, 261301 (2013).
36. First results on low-mass WIMPs from the CDEX-1 experiment at the China Jinping underground laboratory, W. Zhao et al. (including L. Singh) (CDEX Collaboration) Phys. Rev. D 88, 052004 (2013).
37. CDEX-1 1 kg point-contact germanium detector for low mass dark matter searches, KANG Ke-Jun et al. (including L. Singh) (CDEX Collaboration) Chinese Physics C 37, 126002 (2013)
38. . Introduction to the CDEX experiment, Ke-Jun Kang et al. (including L. Singh) (CDEX Collaboration) Front. Phys. 8(4), 412-437 (2013)
39. Measurement of e-electron scattering cross section with a CsI(Tl) scintillating crystal array at the Kuo-Sheng nuclear power reactor M. Deniz et al. (including L. Singh) (TEXONO Collaboration) Phys. Rev. D 81, 072001 (2010).
• Patent:
• Book:

1. Qualified CSIR-JRF (Junior Research Fellow) fellowship in CSIR-UGC exam Conducted jointly by CSIR and UGC of INDIA
2. Visiting Research Scholar IoP, Academia Sinica, Taiwan.
3. Associated Member, CERN (2010)