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

The ALICE collaboration
Acharya, Shreyasi , Adamova, Dagmar , Adhya, Souvik Priyam , Adler, Alexander , Adolfsson, Jonatan , Aggarwal, Madan Mohan , Aglieri Rinella, Gianluca , Agnello, Michelangelo , Agrawal, Neelima , Ahammed, Zubayer
Eur.Phys.J.C 79 (2019) 896, 2019.
https://doi.org/10.17182/hepdata.91995.v2

Abstract (data abstract)
CERN-LHC. 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 $\sqrt{s}=7~\mathrm{TeV}$. 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 $10<p_\mathrm{T}^{\gamma}<60$~GeV/$c$. The result extends the coverage of previously published results of the ATLAS and CMS experiments at the same collision energy to smaller $p_\mathrm{T}^{\gamma}$. 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

  • table_1

    Data from Figure 8 left pannel.

    10.17182/hepdata.91995.v2/t1

    Double differential $p_\mathrm{T}^{\gamma}$ cross section of isolated photons in pp collisions at $\sqrt{s}=7~\mathrm{TeV}$ in the rapidity interval $-0.27< \eta <...

  • table_2

    Theory from Figure 8 left pannel.

    10.17182/hepdata.91995.v2/t2

    pQCD NLO calculations with JETPHOX of the isolated-photon cross section as a function of $p_\mathrm{T}^{\gamma}$. The calculations were obtained by...

  • table_3

    Definition in Section 3.5.

    10.17182/hepdata.91995.v2/t3

    $\kappa^{\rm iso}$, fraction of prompt photons that pass the isolation criteria in PYTHIA 6 ($\gamma$-jet events) at the generator level...

  • table_4

    Data from Figure 10.

    10.17182/hepdata.91995.v2/t4

    Differential cross section of isolated photons as a function of $x_\mathrm{T}^{\gamma}$ measured in pp collisions at $\sqrt{s}=7$ TeV.

Version 2 modifications: 3 complementary tables added to ease the reproduction of the paper figures: the theoretical prediction shown in Fig. 8 and used in Fig. 9, the correction factor used to account for the underlying event of the collision in the theory points, and the xT distribution of Fig. 10.

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