Measurement of proton-dissociative diffractive photoproduction of vector mesons at large momentum transfer at HERA

被引：71

作者：

Chekanov, S

Krakauer, D

Magill, S

Musgrave, B

Repond, J

Yoshida, R

Mattingly, MCK

Antonioli, P

Bari, G

Basile, M

Bellagamba, L

Boscherini, D

Bruni, A

Bruni, G

Romeo, GC

Cifarelli, L

Cindolo, F

Contin, A

Corradi, M

De Pasquale, S

Giusti, P

Iacobucci, G

Levi, G

Margotti, A

Nania, R

Palmonari, F

Pesci, A

Sartorelli, G

Zichichi, A

Aghuzumtsyan, G

Bartsch, D

Brock, I

Crittenden, J

Goers, S

Hartmann, H

Hilger, E

Irrgang, P

Jakob, HP

Kappes, A

Katz, UF

Kerger, R

Kind, O

Paul, E

Rautenberg, J

Renner, R

Schnurbusch, H

Stifutkin, A

Tandler, J

Voss, KC

Weber, A

机构：

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

[2] Univ Lodz, PL-90131 Lodz, Poland

[3] Univ Piemonte Orientale, Novara, Italy

[4] Univ Tokyo, Tokyo, Japan

[5] York Univ, Dept Phys, N York, ON M3J 1P3, Canada

[6] Yale Univ, Dept Phys, New Haven, CT 06520 USA

[7] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[8] Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel

[9] Inst Nucl Studies, Warsaw, Poland

[10] Warsaw Univ, Inst Expt Phys, Warsaw, Poland

[11] UCL, Dept Phys & Astron, London, England

[12] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada

[13] Ist Nazl Fis Nucl, I-10125 Turin, Italy

[14] Univ Turin, Dipartimento Fis Sperimentale, Turin, Italy

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

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

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

[18] Univ Siegen, Fachbereich Phys, D-5900 Siegen, Germany

[19] Seoul Natl Univ, Seoul, South Korea

[20] Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA

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

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

[23] Ist Nazl Fis Nucl, I-00185 Rome, Italy

[24] Polytech Univ, Sagamihara, Kanagawa, Japan

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

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

[27] Ist Nazl Fis Nucl, Padua, Italy

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

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

[30] Univ Amsterdam, Amsterdam, Netherlands

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

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

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

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

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

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

[37] Kyungpook Natl Univ, Taegu 702701, South Korea

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

[39] Natl Lab High Energy Phys, KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki 305, Japan

[40] Forschungszentrum Julich, Inst Kernphys, D-5170 Julich, Germany

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

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

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

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

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

[46] Univ Florence, Florence, Italy

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

[48] DESY, Zeuthen, Germany

[49] DESY, D-2000 Hamburg, Germany

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

来源：

EUROPEAN PHYSICAL JOURNAL C | 2003年 / 26卷 / 03期

关键词：

D O I：

10.1140/epjc/s2002-01079-0

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：

Diffractive photoproduction of vector mesons, gammap --> VY, where Y is a proton-dissociative system, has been measured in e(+)p interactions with the ZEUS detector at HERA using an integrated luminosity of 25 pb(-1). The differential cross section, dsigma/dt, is presented for 1.2 < -t < 12 GeV2, where t is the square of the four-momentum transferred to the vector meson. The data span the range in photon-proton centre-of-mass energy, W, from 80 GeV to 120 GeV. The t distributions are well fit by a power law, dsigma/dt proportional to (-t)(-n). The slope of the effective Pomeron trajectory, measured from the W dependence of the rho(0) and phi cross sections in bins of t, is consistent with zero. The ratios dsigma(gammap-->phiY)/dt to dsigma(gammap-->rho0Y)/dt and dsigma(gammap-->J/psiY)/dt to dsigma(gammap-->rho0Y)/dt increase with increasing -t. Decay- angle analyses for rho(0), phi and J/psi) mesons have been carried out. For the rho(0) and phi mesons, contributions from single and double helicity flip are observed. The results are compared to expectations of theoretical models.

引用

页码：389 / 409

页数：21

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