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| Home > Publications database > Measurement of Feynman-$x$ spectra of photons and neutrons in the very forward direction in deep-inelastic scattering at HERA |
| Journal Article/Internal Report | DESY-2014-03214 |
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2014
Springer
Berlin
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Please use a persistent id in citations: doi:10.1140/epjc/s10052-014-2915-2
Report No.: DESY-14-035; arXiv:1404.0201
Abstract: Measurements of normalised cross sections for the production of photons and neutrons at very small angles with respect to the proton beam direction in deep-inelastic $ep$ scattering at HERA are presented as a function of the Feynman variable $x_F$ and of the centre-of-mass energy of the virtual photon-proton system $W$. The data are taken with the H1 detector in the years 2006 and 2007 and correspond to an integrated luminosity of $131 \mathrm{pb}^{-1}$. The measurement is restricted to photons and neutrons in the pseudorapidity range $\eta>7.9$ and covers the range of negative four momentum transfer squared at the positron vertex $6<Q^2<100$ GeV$^2$, of inelasticity $0.05<y<0.6$ and of $70<W<245 $GeV. To test the Feynman scaling hypothesis the $W$ dependence of the $x_F$ dependent cross sections is investigated. Predictions of deep-inelastic scattering models and of models for hadronic interactions of high energy cosmic rays are compared to the measured cross sections.
Keyword(s): model: deep inelastic scattering ; cross section: measured ; photon: exclusive production ; n: forward production ; scaling: Feynman ; DESY HERA Stor ; momentum transfer dependence ; positron p: deep inelastic scattering ; energy dependence ; x-dependence ; hadron hadron: interaction ; cross section: high energy behavior ; H1 ; experimental results ; 319 GeV-cms
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