ALICE first physics results

TL;DR

The ALICE experiment at the LHC reports initial results on particle production, ratios, and correlations in proton-proton collisions, providing essential references for future heavy-ion studies and exploring QCD phenomena at high energies.

Contribution

First measurements of charged particle production, particle ratios, and correlations in pp collisions at LHC energies, establishing baseline data for heavy-ion research.

Findings

Charged particle pseudorapidity and transverse momentum distributions measured.

Anti-p/p ratio analyzed at high energies.

Bose-Einstein correlations studied in pp collisions.

Abstract

ALICE is the dedicated heavy-ion experiment at the Large Hadron Collider. The experiment has also a broad program of QCD measurements in proton-proton (pp) collisions, which have two-fold interest: the study of particle production at the highest energy frontier, and the definition of references for the corresponding measurements in the upcoming Pb-Pb run. We present the first results on the pseudorapidity and transverse-momentum dependence of charged particle production in pp collisions at LHC energies, on the anti-p/p ratio and on the Bose-Einstein particle correlations. As an outlook, we report on the status of the ongoing analyses for strangeness and heavy-flavour production measurements.