Tomography by neutrino pair beam

TL;DR

This paper explores Earth's interior tomography using a novel neutrino pair beam, demonstrating improved sensitivity to crustal structures and proposing a method to reconstruct matter density profiles through perturbative oscillation probability analysis.

Contribution

It introduces the use of neutrino pair beams for Earth tomography and develops an analytic method to reconstruct matter density profiles from oscillation data.

Findings

Neutrino pair beams provide better sensitivity to Earth's crust than current sources.

A perturbative analytic formula enables matter density profile reconstruction.

The method enhances precision in geophysical measurements using neutrino oscillations.

Abstract

We consider tomography of the Earth's interior using the neutrino pair beam which has recently been proposed. The beam produces a large amount of neutrino and antineutrino pairs from the circulating partially stripped ions and provides the possibility to measure precisely the energy spectrum of neutrino oscillation probability together with a sufficiently large detector. It is shown that the pair beam gives a better sensitivity to probe the Earth's crust compared with the neutrino sources at present. In addition we present a method to reconstruct a matter density profile by means of the analytic formula of the oscillation probability in which the matter effect is included perturbatively to the second order.