Isolated prompt photon photoproduction at NLO
نویسندگان
چکیده
منابع مشابه
Prompt photon processes in photoproduction at HERA
We present results for the photoproduction of inclusive prompt photons and for prompt photons accompanied by jets, measured with the ZEUS detector at HERA. Cross sections as a function of pseudorapidity and transverse energy are presented for 5 < E T < 10 GeV, E jet T > 5 GeV in the centre of mass energy range 120–270 GeV. Comparisons are made with predictions from leading logarithm parton show...
متن کاملPhotoproduction of isolated photons at HERA in NLO QCD
The NLO QCD calculation for the photoproduction of the isolated photon with a large pT at the HERA ep collider is presented. The single resolved photon contribution and the QCD corrections of order αs to the Born term are consistently included. The sizeable NNLO contributions, the box and the double resolved photon subprocesses, are taken into account in addition. The importance of the isolatio...
متن کاملPhotoproduction of Isolated Photons, Single Hadrons and Jets at Nlo
The photoproduction of large-pT charged hadrons and of prompt photons is discussed, for the inclusive case and with an associated jet, using predictions from the NLO partonic Monte Carlo program EPHOX. Comparisons to recent HERA data are also shown.
متن کاملIsolated Prompt Photon Cross Sections
In ee and in hadron-hadron reactions at collider energies, prompt photons are observed and their cross sections are measured only if the photons are relatively isolated in phase space. Isolation is required to reduce various hadronic backgrounds including those from the electromagnetic decay of mesons, e.g., π → 2γ. The essence of isolation is that a cone of half-angle δ is drawn about the dire...
متن کاملPrompt Photon Plus Jet Photoproduction at HERA at Next-to-Leading Order in QCD
The cross section for photoproduction of an isolated prompt photon in association with a jet is studied in Next-to-Leading Order. The kinematics are those appropriate for the DESY ep collider HERA. The effects on the cross section of various experimental cuts including isolation cuts on the photon is examined. Comparisons with the ZEUS preliminary data using two parametrizations of the photon s...
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ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 2001
ISSN: 1434-6044,1434-6052
DOI: 10.1007/s100520100732