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Leading neutron energy and p(T) distributions in deep inelastic scattering and photoproduction at HERA
- Source :
- Nuclear Physics, Section B, Vol. B776, p. 1-37 (2007), Nuclear physics / B 776, 1-37 (2007). doi:10.1016/j.nuclphysb.2007.03.045
- Publication Year :
- 2007
-
Abstract
- The production of energetic neutrons in $ep$ collisions has been studied with the ZEUS detector at HERA. The neutron energy and $p_T^2$ distributions were measured with a forward neutron calorimeter and tracker in a $40 \pb^{-1}$ sample of inclusive deep inelastic scattering (DIS) data and a $6 \pb^{-1}$ sample of photoproduction data. The neutron yield in photoproduction is suppressed relative to DIS for the lower neutron energies and the neutrons have a steeper $p_T^2$ distribution, consistent with the expectation from absorption models. The distributions are compared to HERA measurements of leading protons. The neutron energy and transverse-momentum distributions in DIS are compared to Monte Carlo simulations and to the predictions of particle exchange models. Models of pion exchange incorporating absorption and additional secondary meson exchanges give a good description of the data.<br />48 pages, 6 tables, 23 figures, minor revisions, accepted by Nuclear Physics B
- Subjects :
- Nuclear and High Energy Physics
Particle physics
MONTE-CARLO GENERATOR
Meson
Proton
Astrophysics::High Energy Astrophysical Phenomena
Nuclear Theory
FOS: Physical sciences
PROTON
DIJET CROSS-SECTIONS
PARTON DISTRIBUTIONS
EP COLLISIONS
DESY-HERA
FRAGMENTATION
EVENTS
DIS
SPECTRA
01 natural sciences
7. Clean energy
High Energy Physics - Experiment
Nuclear physics
High Energy Physics - Experiment (hep-ex)
Pion
ZEUS
0103 physical sciences
ddc:530
Neutron
010306 general physics
Nuclear Experiment
Physics
010308 nuclear & particles physics
HERA
Deep inelastic scattering
Neutron temperature
Quasielastic neutron scattering
High Energy Physics::Experiment
Subjects
Details
- Language :
- English
- ISSN :
- 05503213
- Volume :
- 776
- Issue :
- 1-2
- Database :
- OpenAIRE
- Journal :
- NUCLEAR PHYSICS B
- Accession number :
- edsair.doi.dedup.....a5925ead1f1d5b88f8c2e9088172b7ba