Search for large-rapidity-gap events in e+e− annihilation |
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Authors: | John Ellis Douglas A. Ross |
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Affiliation: | 1. Theoretical Physics Division, CERN, CH-1211, Geneva 23, Switzerland 2. Physics Department, University of Southampton, SO17 1BJ, Highfield, Southampton, England
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Abstract: | We investigate the cross section for the production of a low-mass colour-singlet cluster ine + 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 ine + e ? annihilation. Correspondingly, the cross section for such events decreases rapidly with increasing rapidity gap. |
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