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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-58318

H1 Collaboration,; Aaron, F D; Alexa, C; Andreev, V; Müller, K; Robmann, P; Straumann, U; Truöl, P (2011). Measurement of photon production in the very forward direction in deep-inelastic scattering at HERA. European Physical Journal C - Particles and Fields, 71(10):1771.

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Abstract

The production of photons at very small angles with respect to the proton beam direction is studied in deep-inelastic positron–proton scattering at HERA. The data are taken with the H1 detector in the years 2006 and 2007 and correspond to an integrated luminosity of 126 pb−1. The analysis covers the range of negative four momentum transfer squared at the positron vertex 6<Q 2<100 GeV2 and inelasticity 0.05<y<0.6. Cross sections are measured for the most energetic photon with pseudorapidity η>7.9
as a function of its transverse momentum pTlead and longitudinal momentum fraction of the incoming proton xLlead. In addition, the cross sections are studied as a function of the sum of the longitudinal momentum fraction xLsum of all photons in the pseudorapidity range η>7.9. The cross sections are normalised to the inclusive deep-inelastic scattering cross section and compared to the predictions of models of deep-inelastic scattering and models of the hadronic interactions of high energy cosmic rays.

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
DDC:530 Physics
Language:English
Date:2011
Deposited On:12 Feb 2012 15:05
Last Modified:19 Apr 2014 09:16
Publisher:Springer
ISSN:1434-6044 (P) 1434-6052 (E)
Additional Information:The original publication is available at www.springerlink.com
Publisher DOI:10.1140/epjc/s10052-011-1771-6
Related URLs:http://arxiv.org/abs/1106.5944
Citations:Web of Science®. Times Cited: 2
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