# Regeneration of $K^0_{S}$ mesons

## TL;DR

This paper revises the calculation of $K^0_{S}$ meson regeneration by solving coupled equations of motion exactly and via perturbation theory, revealing significantly different results from earlier noncoupled approaches.

## Contribution

It introduces an exact solution to the coupled equations of motion for $K^0_{S}$ regeneration, improving the accuracy over previous noncoupled models.

## Key findings

- Results differ radically from previous calculations.
- Exact solutions provide more accurate regeneration predictions.
- Perturbation theory offers a viable approximation method.

## Abstract

It is shown that in the previous calculations of $K^0_{S}$ regeneration the noncoupled equations of motion have been considered instead of coupled one. We present the calculations based on the exact solution of coupled equations of motion and perturbation theory. The results differ radically from the previous ones.