Probing the perturbative dynamics of exclusive meson pair production
Abstract
We present the results of a recent novel application of the `hard exclusive' perturbative formalism to the process gg --> MMbar at large angles, where M (Mbar) is a light meson (anti-meson). As well as discussing the important theoretical features of the relevant leading-order gg --> qqbar(gg) qqbar(gg) 6-parton amplitudes, we also comment on their phenomenological implications. In particular, we consider the central exclusive production of meson pairs at comparatively large transverse momentum k_t, which is expected to proceed via this mechanism. We show that this leads to various non-trivial predictions for a range of exclusive processes, and that the cross sections for the eta' and eta mesons display significant sensitivity to any valence gg component of the meson wavefunctions.
Keywords
Cite
@article{arxiv.1304.4262,
title = {Probing the perturbative dynamics of exclusive meson pair production},
author = {L. A. Harland-Lang and V. A. Khoze and M. G. Ryskin and W. J. Stirling},
journal= {arXiv preprint arXiv:1304.4262},
year = {2013}
}
Comments
Version accepted for publication in Physics Letters B. 7 pages, 5 figures