Exclusive central diffractive production of scalar and pseudoscalar mesons; tensorial vs. vectorial pomeron

Journal Article · Thu May 15 00:00:00 EDT 2014 · Annals of Physics (New York)

DOI:https://doi.org/10.1016/J.AOP.2014.02.021· OSTI ID:22314816

Lebiedowicz, Piotr ^[1]; Nachtmann, Otto ^[2]; Szczurek, Antoni ^[1]

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1. Institute of Nuclear Physics PAN, PL-31-342 Cracow (Poland)
2. Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, D-69120 Heidelberg (Germany)

We discuss consequences of the models of “tensorial pomeron” and “vectorial pomeron” for exclusive diffractive production of scalar and pseudoscalar mesons in proton–proton collisions. Diffractive production of f{sub 0}(980), f{sub 0}(1370), f{sub 0}(1500), η, and η{sup ′}(958) mesons is discussed. Different pomeron–pomeron–meson tensorial coupling structures are possible in general. In most cases two lowest orbital angular momentum–spin couplings are necessary to describe experimental differential distributions. For f{sub 0}(980) and η production reggeon–pomeron, pomeron–reggeon, and reggeon–reggeon exchanges are included in addition, which seems to be necessary at relatively low energies. The theoretical results are compared with the WA102 experimental data. Correlations in azimuthal angle between outgoing protons, distributions in rapidities and transverse momenta of outgoing protons and mesons, in a special “glueball filter variable”, as well as some two-dimensional distributions are presented. We discuss differences between results of the vectorial and tensorial pomeron models. We show that high-energy central production, in particular of pseudoscalar mesons, could provide crucial information on the spin structure of the soft pomeron.

• OSTI ID: 22314816
• Journal Information: Annals of Physics (New York), Vol. 344, Issue Complete; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-4916
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COMPARATIVE EVALUATIONS
CORRELATIONS
F0-1590 MESONS
F0-980 MESONS
GLUEBALLS
ORBITAL ANGULAR MOMENTUM
PARTICLE PRODUCTION
PARTICLE RAPIDITY
POMERANCHUK PARTICLES
PROTON-PROTON INTERACTIONS
PROTONS
PSEUDOSCALAR MESONS
SPIN
TRANSVERSE MOMENTUM
TWO-DIMENSIONAL CALCULATIONS