Polarizability of the kaonic helium atom

TL;DR

This paper investigates the static dipole polarizability of metastable kaonic helium atom states using complex coordinate rotation, revealing some states are unstable for experimental detection due to collisional quenching.

Contribution

The study applies the complex coordinate rotation method to calculate polarizability and assess stability of metastable kaonic helium states, providing new insights into their experimental observability.

Findings

Some metastable states are unstable against collisional quenching.

Certain states cannot be detected experimentally due to their instability.

The complex coordinate rotation method effectively models resonant states.

Abstract

The static dipole polarizability of metastable states in the kaonic helium atoms is studied. We use the complex coordinate rotation method to properly account for the resonant nature of the states. Our calculations show that some of the states are not stable with respect to collisional quenching in a dense helium target and should not be detected in the experiment.