Observing the odderon: tensor meson photoproduction

E.R. Berger; A. Donnachie; H.G. Dosch; O. Nachtmann

doi:doi:10.1007/s100520000377

EPJ

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2022 Impact factor 4.4

Particles and Fields

Eur. Phys. J. C 14, 673-682
DOI 10.1007/s100520000377

Observing the odderon: tensor meson photoproduction

E.R. Berger¹ - A. Donnachie² - H.G. Dosch³ - O. Nachtmann³

¹ LAPTH, Universite Paris-Sud, Batiment 211, 91405 Orsay Cedex, France
² Department of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK
³ Institut für Theoretische Physik der Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany

Received: 16 February 2000 / Published online: 8 May 2000 - © Springer-Verlag 2000

Abstract
We calculate high-energy photoproduction of the tensor meson f₂(1270) by odderon and photon exchange in the reaction $\gamma + {\rm {p}} \rightarrow f_2(1270) + {\rm {X}}$ , where X is either the nucleon or the sum of the N(1520) and N(1535) baryon resonances. Odderon exchange dominates except at very small transverse momentum, and we find a cross section of about 20 nb at a centre-of-mass energy of 20 GeV. This result is compared with what is currently known experimentally about f₂ photoproduction. We conclude that odderon exchange is not ruled out by present data. On the contrary, an odderon-induced cross section of the above magnitude may help to explain a puzzling result observed by the E687 experiment.