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• Photons in the proton : implications for the LHC 

  Ball, Richard D.; Barontini, Andrea; Candido, Alessandro; Carrazza, Stefano; Cruz-Martinez, Juan; Del Debbio, Luigi; Forte, Stefano; Giani, Tommaso; Hekhorn, Felix; Kassabov, Zahari; Laurenti, Niccolò; Magni, Giacomo; Nocera, Emanuele R.; Rabemananjara, Tanjona R.; Rojo, Juan; Schwan, Christopher; Stegeman, Roy; Ubiali, Maria (Springer, 2024)

  We construct a set of parton distribution functions (PDFs), based on the recent NNPDF4.0 PDF set, that also include a photon PDF. The photon PDF is constructed using the LuxQED formalism, while QED evolution accounting for ...

• Direct photon production at low transverse momentum in proton-proton collisions at √s = 2.76 and 8 TeV 

  ALICE Collaboration (American Physical Society, 2019)

  Measurements of inclusive and direct photon production at midrapidity in pp collisions at √s=2.76 and 8 TeV are presented by the ALICE experiment at the LHC. The results are reported in transverse momentum ranges of 0.4<pT<10 ...

• Low-pT direct-photon production in Au+Au collisions at √sNN = 39 and 62.4 GeV 

  PHENIX Collaboration (American Physical Society (APS), 2023)

  The measurement of direct photons from Au+Au collisions at √sNN=39 and 62.4 GeV in the transverse-momentum range 0.4<3Gev/c is presented by the PHENIX collaboration at the BNLRelativistic Heavy Ion Collider. A significant ...

• Measurement of Direct-Photon Cross Section and Double-Helicity Asymmetry at √s = 510 GeV in →p+→p Collisions 

  PHENIX Collaboration (American Physical Society (APS), 2023)

  We present measurements of the cross section and double-helicity asymmetry ALL of direct-photon production in →p+→p collisions at √s = 510  GeV. The measurements have been performed at midrapidity (|η|<0.25) with the PHENIX ...

• The equivalent photon approximation in one- and two-photon exchange processes 

  Yrjänheikki, Sami (2022)

  Tässä opinnäytetyössä johdetaan ekvivalentti fotoniapproksimaatio ja siihen liittyvä ekvivalentti fotonijakauma yhden ja kahden fotonivaihdon prosesseissa helisiteettipohjaista menetelmää käyttäen kvanttikenttäteorian ...