Toward CP-even Neutrino Beam

TL;DR

This paper proposes a conceptual design for a neutrino beam composed of a mixture of electron neutrinos and antineutrinos to measure CP violation effects in neutrino oscillations, utilizing decay from unstable hydrogen-like heavy ions.

Contribution

It introduces a novel method using accelerated unstable hydrogen-like heavy ions in a storage ring to produce a monochromatic neutrino beam for CP violation studies.

Findings

Design of a neutrino beam with a mixture of $ar{ u}_e$ and $ u_e$

Method to measure CP-odd quantities in neutrino oscillations

Proposal to use decay of hydrogen-like heavy ions in a storage ring

Abstract

The best method of measuring CP violating effect in neutrino oscillation experiments is to construct and use a neutrino beam made of an ideal mixture of $\bar{\nu}_e$ and $\nu_e$ of monochromatic lines. The conceptual design of such a beam is described, together with how to measure the CP-odd quantity. We propose to exploit an accelerated unstable hydrogen-like heavy ion in a storage ring, whose decay has both electron capture and bound beta decay with a comparable fraction.