Measurement of hadron composition in charged jets from pp collisions with the ALICE experiment

TL;DR

This paper presents the first measurement of the composition of charged hadrons within jets produced in proton-proton collisions at 7 TeV, providing new data for understanding jet fragmentation.

Contribution

It introduces the first measurement of charged pion, kaon, and proton production in jets from hadron collider data, using the ALICE detector at the LHC.

Findings

Measured transverse momentum spectra of pions, kaons, and protons in jets.

Compared experimental results with Monte Carlo simulations.

Provided insights into hadronization processes within jets.

Abstract

We report the first measurement of charged pion, kaon and (anti-)proton production in jets from hadron colliders. The measurement was carried out with the ALICE detector using $2\times10^8$ minimum bias pp collisions at a centre-of-mass energy of $\sqrt{s}=7$ TeV at the LHC. We present the $\pi$, K and p transverse momentum ($p_\textrm{T}$) spectra, as well as the spectra of the reduced momentum (${z^\textrm{ch}\equiv p_\textrm{T}^\textrm{track}/p_\textrm{T, jet}^\textrm{ch}}$), in charged jets of $p_\textrm{T}$ between 5--20 $\textrm{GeV}/c$. The measurement is compared to Monte Carlo calculations.