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Measurement of isolated photon production in deep inelastic ep scattering

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • ZEUS Collaboration
<mark>Journal publication date</mark>5/04/2010
<mark>Journal</mark>Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1
Number of pages10
Pages (from-to)16-25
Publication StatusPublished
<mark>Original language</mark>English


Isolated photon production in deep inelastic ep scattering has been measured with the ZEUS detector at HERA using an integrated luminosity of 320 pb - 1. Measurements were made in the isolated-photon transverse-energy and pseudorapidity ranges 4 < E T γ < 15 GeV and - 0.7 < η γ < 0.9 for exchanged photon virtualities, Q 2, in the range 10 < Q 2 < 350 GeV 2 and for invariant masses of the hadronic system W X > 5 GeV. Differential cross sections are presented for inclusive isolated photon production as functions of Q 2, x, E T γ and η γ. Leading-logarithm parton-shower Monte Carlo simulations and perturbative QCD predictions give a reasonable description of the data over most of the kinematic range.

Bibliographic note

Funding Information: Supported in part by the MINERVA Gesellschaft für Forschung GmbH, the Israel Science Foundation (grant No. 293/02-11.2) and the US–Israel Binational Science Foundation. 2 37 Editor: L. Rolandi