Suora fotonituotto suurienergiaisissa ydintörmäyksissä sähkömagneettisen ja vahvan vuorovaikutuksen kertaluvussa O(α _em α_S)
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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 ... -
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 ... -
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 ... -
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 ... -
Massive quarks in NLO dipole factorization for DIS : Transverse photon
Beuf, G.; Lappi, T.; Paatelainen, R. (American Physical Society (APS), 2022)We calculate the light-cone wave functions for the QCD Fock components in a transverse virtual photon necessary for applications at next-to-leading order (NLO) in the QCD coupling, including quark masses. We present a ...