NLO calculation of prompt photon production in DIS at HERA

• Published in: The European physical journal. C, Particles and fields Vol. 71; no. 4; pp. 1 - 7
• Main Authors: Aurenche, P., Basu, Rahul, Fontannaz, M.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01.04.2011; Springer; Springer Nature B.V; Springer Verlag (Germany)
• Subjects: Astronomy; Astrophysics and Cosmology; Cross sections; Cut-off; Elementary Particles; Exact sciences and technology; Fragmentation; Frames; Hadrons; Heavy Ions; High Energy Physics - Phenomenology; Inelastic scattering; Mathematical analysis; Measurement Science and Instrumentation; Nuclear Energy; Nuclear Physics; Photons; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Regular Article - Theoretical Physics; Scattering; String Theory; The physics of elementary particles and fields; Transverse momentum; Laboratory Frame; Virtual Photon; Transverse Momentum; Fragmentation Function; ZEUS Collaboration; Protons; Prompt photon; Inelastic scattering; Center of mass; Elementary particles; Virtual particles; Cross sections; Mathematical physics; Fragmentation; Photon production
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-011-1616-3

We present a next-to-leading order calculation of prompt photon production in deep-inelastic scattering. The calculation involves direct, fragmentation and resolved contributions. Inclusive as well as isolated photon production cross sections are presented. The relevance of imposing a transverse momentum cut-off in the virtual-photon proton center-of-mass system rather than in the laboratory frame is discussed. Whenever possible, a comparison of the theoretical results with recent HERA data is carried out.