20-27 July 2011
Alpes Congrès - Alpexpo
Europe/Paris timezone

Isolated photon production in DIS at HERA with ZEUS

23 Jul 2011, 09:30
15m
Bayard (Alpes Congrès - Alpexpo)

Bayard

Alpes Congrès - Alpexpo

Parallel session talk QCD

Speaker

Peter Bussey

Description

Isolated photon production in deep inelastic ep scattering has been measured with the ZEUS detector at HERA using an integrated luminosity of 320pb-1. Measurements were made in the isolated-photon transverse-energy and pseudorapidity ranges 4 < ET < 15 GeV and -0.7 < eta < 0.9 for exchanged photon virtualities, Q2, in the range 10 < Q2 < 350 GeV and for invariant masses of the hadronic system WX > 5 GeV. Differential cross sections are presented for inclusive isolated photon production as functions of Q2, x, ET and eta. Isolated-photon+jet production in ep collisions at a centre-of-mass energy of 318 GeV has also been measured with the ZEUS detector at HERA using an integrated luminosity of up to 300 pb-1. Measurements of prompt-photon+jet cross sections are presented as functions of the photon transverse energy and pseudorapidity in a wide range of exchanged-photon virtuality. In addition, differential gamma+jet cross sections are presented as functions of the jet transverse energy and pseudorapidity. Leading-logarithm parton-shower Monte Carlo predictions and perturbative QCD calculations were compared to the data.

Primary author

Dr Aharon LEVY (Tel Aviv University)

Presentation Materials