# An investigation on the leading and subleading high-energy behavior of hadron-hadron total cross sections using a best-fit analysis of hadronic scattering data

## TL;DR

This paper analyzes high-energy hadron-hadron total cross sections using a QCD-inspired parametrization fitted to experimental data, including LHC results, and explores theoretical scenarios involving universal parameters and asymptotic ratios.

## Contribution

It introduces a best-fit analysis of hadronic scattering data based on a QCD-inspired model with universal parameters, comparing different high-energy behavior scenarios.

## Key findings

- Fitted parameters B and C from data including LHC results.
- Compared theoretical predictions with experimental fits.
- Explored scenarios with universal parameters and asymptotic ratios.

## Abstract

In the present investigation we study the leading and subleading high-energy behavior of hadron-hadron total cross sections using a best-fit analysis of hadronic scattering data. The parametrization used for the hadron-hadron total cross sections at high energy is inspired by recent results obtained by Giordano and Meggiolaro (2014) using a nonperturbative approach in the framework of QCD and it reads $\sigma_\text{tot} \sim B\ln^2 s + C\ln s\ln\ln s$. Both $B$ and $C$ are obtained by means of best-fits to data for proton-proton and antiproton-proton scattering, including recent data obtained at the LHC, and also to data for other meson-baryon and baryon-baryon scattering processes. The results are compared to the theoretical predictions existing in the literature. In particular, following the above-mentioned nonperturbative QCD approach, we also consider fits where the parameters $B$ and $C$ are set to $B = \kappa B_\text{th}$ and $C = \kappa C_\text{th}$, where $B_\text{th}$ and $C_\text{th}$ are universal quantities related to the QCD stable spectrum, while $\kappa$ (treated as an extra free parameter) is related to the asymptotic value of the ratio $\sigma_\text{el}/\sigma_\text{tot}$. Different possible scenarios are then considered and compared.