# Longitudinal profiles of Extensive Air Showers with inclusion of charm and bottom particles

## TL;DR

This paper investigates how including charm and bottom particles in simulations of extensive air showers affects their development and observable features, using modified Monte Carlo models.

## Contribution

It introduces a modification to the CORSIKA Monte Carlo to include charm and bottom production in primary interactions, exploring their impact on air shower profiles.

## Key findings

- Charm and bottom particles significantly alter the longitudinal development of air showers.
- Presence of heavy particles shifts the depth of maximum energy deposition.
- Different production models and parameters influence the extent of these effects.

## Abstract

Charm and bottom particles are rare in Extensive Air Showers but the effect of its presence can be radical in the development of the Extensive Air Showers (EAS). If such particles arise with a large fraction of the primary energy, they can reach large atmospheric depths, depositing its energy in deeper layers of the atmosphere. As a consequence, the EAS observables ($X_{max}$, $RMS$ and $N_{max}$) will be modified, as well as the shape of the longitudinal profile of the energy deposited in the atmosphere. In this paper, we will modify the CORSIKA Monte Carlo by the inclusion of charm and bottom production in the first interaction of the primary cosmic ray. Results for different selections of the typical $x_F$ values of the heavy particles and distinct production models will be presented.