Recent results from NA61/SHINE and comparison to NA49

TL;DR

The paper reports preliminary results from the NA61/SHINE experiment on hadron production and fluctuations in proton-proton collisions, comparing these with previous NA49 data to explore properties of strongly interacting matter.

Contribution

It presents new measurements of single-particle spectra and multiplicity fluctuations in p+p interactions, extending previous NA49 results and contributing to the search for the QCD critical point.

Findings

Preliminary spectra and fluctuation data for p+p collisions at CERN SPS.

Comparison of NA61/SHINE results with NA49 p+p and Pb+Pb data.

Insights into the onset of deconfinement and critical point signals.

Abstract

The NA61/SHINE experiment aims to discover the critical point of strongly interacting matter and study properties of the onset of deconfinement. It also performs precise hadron production measurements for the neutrino and cosmic rays experiments. These goals are being achieved by measurements of hadron production properties in nucleus-nucleus, proton-proton and proton/pion-nucleus interactions as a function of collision energy and size of the colliding nuclei. This contribution presents preliminary results from the NA61 ion program on single-particle spectra and identified particle multiplicity fluctuations in p+p interactions at the CERN SPS. Comparisons with results from p+p and Pb+Pb collisions obtained by the NA49 experiment are shown.