Isolated photon cross sections in pp and p-Pb at 5.02 TeV with ALICE

ORAL

Abstract

Prompt photons, produced via QCD Compton scattering or quark and anti-quark annihilation at leading order, are unique probes to study QCD processes since they do not interact strongly and therefore allow to control the dynamics of the initial hard parton scattering. Isolated photon production in pp collisions is one of the most clear tests of perturbative QCD processes and parton distribution functions. Photon measurement in p-A collisions provides the opportunity to measure possible modifications of the nucleon structure function in nuclei. ALICE has measured isolated photons at low pT, thus extending previous measurements down to small x. In this talk, the cross section of isolated photons for the range 12 GeV/c < pT < 60 GeV/c is presented in pp and p-Pb collisions at 5.02 TeV .

*Acknowledgements: This material is based upon work supported by the Department of Energy National Nuclear Security Administration through the Nuclear Science and Security Consortium under Award Number(s) DE-NA0003996. Disclaimer: This presentation was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions

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Presenters

  • Dhruv Dixit

    • University of California, Berkeley

Authors

  • Dhruv Dixit

    • University of California, Berkeley