Title
Measurement of isolated photon production in deep-inelastic scattering at Hera Measurement of isolated photon production in deep-inelastic scattering at Hera
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Berlin ,
Subject
Physics
Source (journal)
European physical journal : C : particles and fields. - Berlin
Volume/pages
54(2008) :3 , p. 371-387
ISSN
1434-6044
ISI
000254206800003
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The production of isolated photons in deep-inelastic scattering ep¨eÁX is measured with the H1 detector at HERA. The measurement is performed in the kinematic range of negative four-momentum transfer squared 4<Q2<150 GeV2 and a mass of the hadronic system WX>50 GeV. The analysis is based on a total integrated luminosity of 227 pb-1. The production cross section of isolated photons with a transverse energy in the range 3<ET Á<10 GeV and pseudorapidity range -1.2<ÅÁ<1.8 is measured as a function of ET Á, ÅÁ and Q2. Isolated photon cross sections are also measured for events with no jets or at least one hadronic jet. The measurements are compared with predictions from Monte Carlo generators modelling the photon radiation from the quark and the electron lines, as well as with calculations at leading and next to leading order in the strong coupling. The predictions significantly underestimate the measured cross sections.
E-info
https://repository.uantwerpen.be/docman/iruaauth/148836/d6c19949244.pdf
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