# Measurement of the inclusive isolated photon production cross section in pp collisions at $\sqrt{s}$ = 7 TeV

## TL;DR

This paper reports the measurement of inclusive isolated photon production cross sections in proton-proton collisions at 7 TeV, extending the transverse momentum range and confirming agreement with theoretical predictions and other experiments.

## Contribution

The study provides new measurements at lower transverse momentum, enhancing the understanding of photon production in high-energy proton-proton collisions.

## Key findings

- Measurements agree with NLO perturbative QCD calculations.
- Results extend previous pT coverage to smaller values.
- Consistent with ATLAS and CMS experimental results.

## Abstract

The production cross section of inclusive isolated photons has been measured by the ALICE experiment at the CERN LHC in pp collisions at a centre-of-momentum energy of $\sqrt{s}=$ 7 TeV. The measurement is performed with the electromagnetic calorimeter EMCal and the central tracking detectors, covering a range of $|\eta|<0.27$ in pseudorapidity and a transverse momentum range of $ 10 < p_{\rm T}^{\gamma} < $ 60 GeV/$c$. The result extends the $p_{\rm T}$ coverage of previously published results of the ATLAS and CMS experiments at the same collision energy to smaller $p_{\rm T}$. The measurement is compared to next-to-leading order perturbative QCD calculations and to the results from the ATLAS and CMS experiments. All measurements and theory predictions are in agreement with each other.