Speaker
Andrii Iudin
Description
Isolated-photon+jet production in ep collisions at a centre-of-mass
energy of 318 GeV has 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.
Isolated-photon production in photoproduction, both inclusive and
together with a jet, has been measured with the ZEUS detector at HERA using an integrated luminosity of $370\,
\mathrm{pb}^{-1}$. Measurements were made in the isolated-photon
transverse-energy and pseudorapidity ranges $6 < E_T^{\gamma} <
15\,\mathrm{GeV}$ and $-0.7 < \eta^{\gamma} < 0.9$, and for jet
transverse-energy and pseudorapidity ranges $4 < \ETjet <
35\,\mathrm{GeV}$ and $-1.5 < \etajet < 1.8$, for exchanged
photon virtualities $Q^2 < 1.\mathrm{GeV}^2$. Differential cross
sections are presented for inclusive isolated photon production as
functions of the transverse momentum and pseudorapidity of the
photon and the jet. Higher-order theoretical calculations are compared to the results.
Authors
Co-author
Iris Abt
(Werner-Heisenberg-Institut)
