Observing the odderon: tensor meson photoproduction
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
We calculate high-energy photoproduction of the tensor meson f2(1270) by odderon and photon exchange in the reaction , 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.
Copyright Società Italiana di Fisica, Springer-Verlag 2000