Search for Large Rapidity Gap Events in e^+ e^- Annihilation

Details Search for Large Rapidity Gap Events in e^+ e^- Annihilation Search for Large Rapidity Gap Events in e^+ e^- Annihilation

1995-06-08

arxiv.org/abs/hep-ph/9506266v2

Z.Phys.C70:115-124,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

LATEX file - 21 pages + 15 figures

Scientific paper

10.1007/s002880050088

We investigate the cross-section for the production of a low-mass colour-singlet cluster in $e^+e^-$ annihilation with a large rapidity gap between the colour-singlet cluster and the other jets. It is argued that such events are the cross-channel analogue of large-rapidity-gap events in deep-inelastic scattering, and therefore could in principle be used to investigate the analytic continuation of the BFKL pomeron to the positive-$t$ kinematic regime, where one would expect the trajectory to pass through glueball states. The cross section can be calculated in perturbative QCD, so that the infrared scale arising from non-perturbative effects, which prevents an exponential fall-off with rapidity gap in the case of deep-inelastic scattering, is absent in $e^+ e^-$ annihilation. Correspondingly, the cross section for such events decreases rapidly with increasing rapidity gap.

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