Abstract
Differential cross sections for dijet photoproduction in association with a leading neutron using the reaction e+ + p → e+ + n + jet + jet + Xr have been measured with the ZEUS detector at HERA using an integrated luminosity of 6.4 pb-1. The fraction of dijet events with a leading neutron in the final state was studied as a function of the jet kinematic variables. The cross sections were measured for jet transverse energies Ejet T > 6 GeV, neutron energy En > 400 GeV, and neutron production angle θn < 0.8 mrad. The data are broadly consistent with factorization of the lepton and hadron vertices and with a simple one-pion-exchange model.
| Original language | English |
|---|---|
| Pages (from-to) | 3-29 |
| Number of pages | 27 |
| Journal | Nuclear Physics B |
| Volume | 596 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - Feb 26 2001 |
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In: Nuclear Physics B, Vol. 596, No. 1-2, 26.02.2001, p. 3-29.
Research output: Contribution to journal › Article › peer-review
TY - JOUR
T1 - Measurement of dijet cross sections for events with a leading neutron in photoproduction at HERA
AU - Breitweg, J.
AU - Chekanov, S.
AU - Derrick, M.
AU - Krakauer, D.
AU - Magill, S.
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N1 - Funding Information: E-mail address: b.foster@bristol.ac.uk (B. Foster). 1Supported by the US Department of Energy. 2Now visiting scientist at DESY. 3Now at University of Salerno and INFN Napoli, Italy. 4Supported by the Italian National Institute for Nuclear Physics (INFN). 5Now at CERN. 6Now at CalTech, USA. 7Now at Sparkasse Bonn, Germany. 8Now at Siemens ICN, Berlin, Germany. 9 Retired. 10 Supported by the GIF, contract I-523-13.7/97. 11Supported by the German Federal Ministry for Education and Science, Research and Technology (BMBF), under contract numbers 057BN19P, 057FR19P, 057HH19P, 057HH29P, 057SI75I. 12PPARC advanced fellow. 13Supported by the Portuguese Foundation for Science and Technology (FCT). 14Supported by the Particle Physics and Astronomy Research Council. 15 Now at Dongshin University, Naju, Korea. 16 Supported by the Korean Ministry of Education and Korea Science and Engineering Foundation. Funding Information: 17Supported by the US National Science Foundation. 18 Supported by the Polish State Committee for Scientific Research, grant No. 112/E-356/SPUB/DESY/P03/DZ 3/99, 620/E-77/SPUB/DESY/P-03/DZ 1/99, 2P03B03216, 2P03B04616, 2P03B03517, and by the German Federal Ministry of Education and Science, Research and Technology (BMBF). 19 Supported by the Polish State Committee for Scientific Research (grant No. 2P03B08614 and 2P03B06116). 20 Deceased. 21 Now at Netlife AG, Hamburg, Germany. 22 Now at University of Edinburgh, Edinburgh, UK. 23 Partly supported by an ICSC-World Laboratory Björn H. Wiik Scholarship. 24 Visitor of University of Crete, Greece, partially supported by DAAD, Bonn - Kz. A/98/16764. 25 On leave from MSU, supported by the GIF, contract I-0444-176.07/95. 26Supported by DAAD, Bonn - Kz. A/98/12712. 27 Also at University of Tokyo. 28Supported by the Japanese Ministry of Education, Science and Culture (the Monbusho) and its grants for Scientific Research. 29 Supported by the Comunidad Autonoma de Madrid. 30Supported by the Spanish Ministry of Education and Science through funds provided by CICYT. 31 Supported by the Natural Sciences and Engineering Research Council of Canada (NSERC). 32Supported by the FCAR of Québec, Canada. 33 Now at Loma Linda University, Loma Linda, CA, USA. 34Partially supported by the German Federal Ministry for Education and Science, Research and Technology (BMBF). 35Supported by the Fund for Fundamental Research of Russian Ministry for Science and Education and by the German Federal Ministry for Education and Science, Research and Technology (BMBF). 36Supported by the Netherlands Foundation for Research on Matter (FOM). 37 Supported by the Feodor Lynen Program of the Alexander von Humboldt foundation. 38Partly supported by Tel Aviv University. 39 An Alexander von Humboldt Fellow at University of Hamburg. 40 Supported by a MINERVA fellowship. 41Supported by the German–Israeli Foundation, the Israel Science Foundation, the US–Israel Binational Science Foundation, and by the Israel Ministry of Science. 42 Present address: Tokyo Metropolitan University of Health Sciences, Tokyo 116-8551, Japan. 43Now also at Università del Piemonte Orientale, I-28100 Novara, Italy. 44 Supported by the MINERVA Gesellschaft für Forschung GmbH, the Israel Science Foundation, the US–Israel Binational Science Foundation, the Israel Ministry of Science and the Benozyio Center for High Energy Physics. 45 Now at University of Rochester, Rochester, NY, USA. Funding Information: We are especially grateful to the DESY Directorate whose encouragement and financial support made possible the construction and installation of the FNC. We are also happy to acknowledge the efforts of the DESY accelerator group and the support of the DESY computing group. We thank H. Jung and G. Ingelman for their help with the Monte Carlo programs RAPGAP and POMPYT.
PY - 2001/2/26
Y1 - 2001/2/26
N2 - Differential cross sections for dijet photoproduction in association with a leading neutron using the reaction e+ + p → e+ + n + jet + jet + Xr have been measured with the ZEUS detector at HERA using an integrated luminosity of 6.4 pb-1. The fraction of dijet events with a leading neutron in the final state was studied as a function of the jet kinematic variables. The cross sections were measured for jet transverse energies Ejet T > 6 GeV, neutron energy En > 400 GeV, and neutron production angle θn < 0.8 mrad. The data are broadly consistent with factorization of the lepton and hadron vertices and with a simple one-pion-exchange model.
AB - Differential cross sections for dijet photoproduction in association with a leading neutron using the reaction e+ + p → e+ + n + jet + jet + Xr have been measured with the ZEUS detector at HERA using an integrated luminosity of 6.4 pb-1. The fraction of dijet events with a leading neutron in the final state was studied as a function of the jet kinematic variables. The cross sections were measured for jet transverse energies Ejet T > 6 GeV, neutron energy En > 400 GeV, and neutron production angle θn < 0.8 mrad. The data are broadly consistent with factorization of the lepton and hadron vertices and with a simple one-pion-exchange model.
UR - http://www.scopus.com/inward/record.url?scp=0035952427&partnerID=8YFLogxK
U2 - 10.1016/S0550-3213(00)00612-X
DO - 10.1016/S0550-3213(00)00612-X
M3 - Article
AN - SCOPUS:0035952427
SN - 0550-3213
VL - 596
SP - 3
EP - 29
JO - Nuclear Physics B
JF - Nuclear Physics B
IS - 1-2
ER -