# Measurements of $\pi^\pm$, K$^\pm$, p and $\bar{\textrm{p}}$ spectra in proton-proton interactions at 20, 31, 40, 80 and 158 GeV/c with the NA61/SHINE spectrometer at the CERN SPS

## TL;DR

This paper reports detailed measurements of particle spectra and multiplicities in proton-proton collisions at various energies, providing essential baseline data for studying the onset of deconfinement and the critical point in strongly interacting matter.

## Contribution

First comprehensive set of inclusive spectra and multiplicities for multiple particles in p+p interactions across a range of energies at CERN SPS.

## Key findings

- Spectra as functions of rapidity and transverse momentum are provided.
- Data compared to current theoretical models.
- Baseline data for deconfinement and critical point studies.

## Abstract

Measurements of inclusive spectra and mean multiplicities of $\pi^\pm$, K$^\pm$, p and $\bar{\textrm{p}}$ produced in inelastic p+p interactions at incident projectile momenta of 20, 31, 40, 80 and 158 GeV/c ($\sqrt{s} = $ 6.3, 7.7, 8.8, 12.3 and 17.3 GeV, respectively) were performed at the CERN Super Proton Synchrotron using the large acceptance NA61/SHINE hadron spectrometer. Spectra are presented as function of rapidity and transverse momentum and are compared to predictions of current models. The measurements serve as the baseline in the NA61/SHINE study of the properties of the onset of deconfinement and search for the critical point of strongly interacting matter.