Leading neutron energy and pT distributions in deep inelastic scattering and photoproduction at HERA

被引：44

作者：

Chekanov, S.

Derrick, M.

Magill, S.

Miglioranzi, S.

Musgrave, B.

Nicholass, D.

Repond, J.

Yoshida, R.

Mattingly, M. C. K.

Jechow, M.

Pavel, N.

Molina, A. G. Yaguees

Antonelli, S.

Antonioli, P.

Bari, G.

Basile, M.

Bellagamba, L.

Bindi, M.

Boscherini, D.

Bruni, A.

Bruni, G.

Cifarelli, L.

Cindolo, F.

Contin, A.

Corradi, M.

De Pasquale, S.

Lacobucci, G.

Margotti, A.

Nania, R.

Polini, A.

Rinaldi, L.

Sartorelli, G.

Zichichi, A.

Bartsch, D.

Brock, I.

Goers, S.

Hartmann, H.

Hilger, E.

Jakob, H. -P.

Juengst, M.

Kind, O. M.

Paul, E.

Renner, R.

Samson, U.

Schoenberg, V.

Shehzadi, R.

Wlasenko, M.

Brook, N. H.

Heath, G. P.

Morris, J. D.

机构：

[1] Univ Florence, Florence, Italy

[2] Ist Nazl Fis Nucl, I-50125 Florence, Italy

[3] Argonne Natl Lab, Argonne, IL 60439 USA

[4] Andrews Univ, Berrien Springs, MI 49104 USA

[5] Humboldt Univ, Inst Phys, Berlin, Germany

[6] Univ Bologna, Bologna, Italy

[7] Ist Nazl Fis Nucl, I-40126 Bologna, Italy

[8] Univ Bonn, Inst Phys, D-5300 Bonn, Germany

[9] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England

[10] Univ Calabria, Dept Phys, I-87036 Cosenza, Italy

[11] Ist Nazl Fis Nucl, Cosenza, Italy

[12] Chonnam Natl Univ, Kwangju, South Korea

[13] Univ Malaya, Kuala Lumpur 50603, Malaysia

[14] Columbia Univ, Nevis Labs, Hudson, NY 10027 USA

[15] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Krakow, Poland

[16] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Krakow, Poland

[17] Jagiellonian Univ, Dept Phys, Krakow, Poland

[18] DESY, D-2000 Hamburg, Germany

[19] DESY, Zeuthen, Germany

[20] Univ Freiburg, Fak Phys, D-7800 Freiburg, Germany

[21] Univ Glasgow, Dept Phys & Astron, Glasgow, Lanark, Scotland

[22] Univ Aegean, Dept Engn Management & Finance, Mitilini, Greece

[23] Univ Hamburg, Inst Expt Phys, Hamburg, Germany

[24] Univ London Imperial Coll Sci Technol & Med, High Energy Nucl Phys Grp, London, England

[25] KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki, Japan

[26] Minist Educ & Sci Kazakhstan, Inst Phys & Technol, Alma Ata, Kazakhstan

[27] Kyungpook Natl Univ, Ctr High Energy Phys, Taegu, South Korea

[28] Catholic Univ Louvain, Inst Phys Nucl, B-1348 Louvain, Belgium

[29] Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain

[30] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

[31] Meiji Gakuin Univ, Fac Gen Educ, Yokohama, Kanagawa, Japan

[32] Moscow Engn Phys Inst, Moscow 115409, Russia

[33] Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow, Russia

[34] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[35] NIKHEF H, NL-1009 DB Amsterdam, Netherlands

[36] Univ Amsterdam, Amsterdam, Netherlands

[37] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[38] Univ Oxford, Dept Phys, Oxford, England

[39] Univ Padua, Dipartimento Fis, Padua, Italy

[40] Ist Nazl Fis Nucl, Padua, Italy

[41] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[42] Polytech Univ, Sagamihara, Kanagawa, Japan

[43] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[44] Ist Nazl Fis Nucl, Rome, Italy

[45] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[46] Tel Aviv Univ, Sch Phys, Raymond & Beverly Sackler Fac Exact Sci, IL-69978 Tel Aviv, Israel

[47] Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan

[48] Univ Tokyo, Dept Phys, Tokyo 113, Japan

[49] Tokyo Metropolitan Univ, Dept Phys, Tokyo, Japan

[50] Univ Turin, Turin, Italy

来源：

NUCLEAR PHYSICS B | 2007年 / 776卷 / 1-2期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1016/j.nuclphysb.2007.03.045

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

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 transversemomentum 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. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：1 / 37

页数：37

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