Leading Neutron Energy and pT Distributions in Deep Inelastic Scattering and Photoproduction at HERA

ZEUS Collaboration

doi:10.1016/j.nuclphysb.2007.03.045

Leading Neutron Energy and p_T Distributions in Deep Inelastic Scattering and Photoproduction at HERA

ZEUS Collaboration

Department of Physics

Research output: Contribution to journal › Article › peer-review

Abstract

The production of energetic neutrons in ep collisions has been studied with the ZEUS detector at HERA. The neutron energy and pT2 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 pT2 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. © 2007 Elsevier B.V. All rights reserved.

Original language	American English
Pages (from-to)	1-37
Journal	Nuclear Physics B
Volume	776
Issue number	1-2
DOIs	https://doi.org/10.1016/j.nuclphysb.2007.03.045
State	Published - Jul 30 2007

Disciplines

Nuclear

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Cite this

@article{968df1ce9bb444a6a408b3a00c35f63b,

title = "Leading Neutron Energy and pT Distributions in Deep Inelastic Scattering and Photoproduction at HERA",

abstract = "The production of energetic neutrons in ep collisions has been studied with the ZEUS detector at HERA. The neutron energy and pT2 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 pT2 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. {\textcopyright} 2007 Elsevier B.V. All rights reserved.",

author = "{ZEUS Collaboration} and Mattingly, {Margarita C. K.}",

year = "2007",

month = jul,

day = "30",

doi = "10.1016/j.nuclphysb.2007.03.045",

language = "American English",

volume = "776",

pages = "1--37",

journal = "Nuclear Physics B",

number = "1-2",

}

TY - JOUR

T1 - Leading Neutron Energy and pT Distributions in Deep Inelastic Scattering and Photoproduction at HERA

AU - ZEUS Collaboration

AU - Mattingly, Margarita C. K.

PY - 2007/7/30

Y1 - 2007/7/30

N2 - The production of energetic neutrons in ep collisions has been studied with the ZEUS detector at HERA. The neutron energy and pT2 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 pT2 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. © 2007 Elsevier B.V. All rights reserved.

AB - The production of energetic neutrons in ep collisions has been studied with the ZEUS detector at HERA. The neutron energy and pT2 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 pT2 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. © 2007 Elsevier B.V. All rights reserved.

UR - https://digitalcommons.andrews.edu/pubs/1972

U2 - 10.1016/j.nuclphysb.2007.03.045

DO - 10.1016/j.nuclphysb.2007.03.045

M3 - Article

VL - 776

SP - 1

EP - 37

JO - Nuclear Physics B

JF - Nuclear Physics B

IS - 1-2

ER -