Fig. 4: Neutrinos interacting with electrons via magnetic dipole moment. | Communications Physics

Fig. 4: Neutrinos interacting with electrons via magnetic dipole moment.

From: Collective excitations and low-energy ionization signatures of relativistic particles in silicon detectors

Fig. 4

a The differential cross section of neutrinos interacting with a silicon target through a magnetic dipole moment μν = 10−12 μB. Blue line corresponds to the Lindhard model68, orange and green lines corresponds to DarkELF (Mermin) and DarkELF (GPAW) respectively24,25, and the red line corresponds to QCDark28. The black line shows the results for a free electron. Note that the free electron approximation is a good estimate for the shape of the differential cross-section compared to modeling the same via a dielectric approximation at high recoil energies, ω > 20 eV, however it overestimates the rate by  ~ 50% in this region. b The cross section versus the number of electron-hole pairs created, where we use the secondary ionization model from ref. 88 at 100 K. The charge ionization spectrum is drastically different between the correct calculation and the free-electron calculation, and σQ first rises as a function of Q, until about Q ~ 5 e−, then decreases again.

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