Largep
cT
cross-section differences as tests of quark-gluon scattering |
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Authors: | M Anselmino P Kroll E Leader |
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Institution: | 1. Westfield College, NW3, London, UK 3. CERN, CH-1211, Geneva 23, Switzerland
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Abstract: | It is shown that certain cross-section differences, such as \(d\sigma (p\bar p \to CX) - d\sigma (p\bar p \to \bar CX)\) or \(d\sigma (pp \to CX) - d\sigma (pp \to \bar CX)\) provide a more direct and stringent test of the QCD partonic picture than do the individual cross-sections. In particular they are very sensitive to quark-gluon scattering and to the three-gluon vertex. They also provide a severe test of the evolution of the distribution functions into a new régime ofQ 2. We carry out detailed numerical studies for π andK production, at ISR and collider energies. We find very good agreement with the recent ISR data onpp→π± x. The cross-section differences for \(p\bar p\) collisions are predicted to be also large and measurable with significant accuracy. |
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