QED background against atomic neutrino process with initial spatial phase

Abstract

Atomic deexcitation emitting a neutrino pair and a photon is expected to provide a novel method of neutrino physics if it is enhanced by quantum coherence in a macroscopic target. However, the same enhancement mechanism may also lead to a serious problem of enhanced QED background process. We show that the QED background can be suppressed enough in the photonic crystal waveguide by using the spatial phase that is imprinted in the process of initial coherence generation in the target at excitation. *

Disentangle neutrino electromagnetic properties with atomic radiative pair emission

“…Extra measures are needed to reduce the higher order QED backgrounds to a reasonable level. The use of crystal waveguides is a possible solution to achieve an n-photon background free experiment [67,68]. In our work we consider that all QED backgrounds can be removed.…”

Probing light mediators in the radiative emission of neutrino pair

“…Fortunately, this background can be removed using the photonic crystals wave guides [128] that forbid the emission of photons with a wavelength λ ≤ π/L, where L is the size of the wave guide. Recent advances show that the background can be significantly reduced to achieve background free environment [129].…”