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  • Letter
  • Open Access

Implications of the first evidence for coherent elastic scattering of reactor neutrinos

Jiajun Liao1,*, Hongkai Liu2,†, and Danny Marfatia3,‡

  • 1School of Physics, Sun Yat-sen University, Guangzhou 510275, China
  • 2Department of Physics, Technion—Israel Institute of Technology, Haifa 3200003, Israel
  • 3Department of Physics and Astronomy, University of Hawaii at Manoa, Honolulu, Hawaii 96822, USA

  • *liaojiajun@mail.sysu.edu.cn
  • †lliu.hongkai@campus.technion.ac.il
  • ‡dmarf8@hawaii.edu

Phys. Rev. D 106, L031702 – Published 11 August, 2022

DOI: https://doi.org/10.1103/PhysRevD.106.L031702

Abstract

The recent evidence for coherent elastic neutrino-nucleus scattering (CEνNS) in the NCC-1701 germanium detector using antineutrinos from the Dresden-II nuclear reactor is in good agreement with standard model expectations. However, we show that a 2σ improvement in the fit to the data can be achieved if the quenching factor is described by a modified Lindhard model. We also place constraints on the parameter space of a light vector or scalar mediator that couples to neutrinos and quarks, and on a neutrino magnetic moment. We demonstrate that the constraints are quite sensitive to the quenching factor at low recoil energies by comparing constraints for the standard Lindhard model with those by marginalizing over the two parameters of the modified Lindhard model.

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