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Observation of color-transparency in diffractive dissociation of pions |
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| Authors: | Aitala E M Amato S Anjos J C Appel J A Ashery D Banerjee S Bediaga I Blaylock G Bracker S B Burchat P R Burnstein R A Carter T Carvalho H S Copty N K Cremaldi L M Darling C Denisenko K Devmal S Fernandez A Fox G F Gagnon P Gerzon S Gobel C Gounder K Halling A M Herrera G Hurvits G James C Kasper P A Kwan S Langs D C Leslie J Lichtenstadt J Lundberg B MayTal-Beck S Meadows B de Mello Neto J R Mihalcea D Milburn R H de Miranda J M Napier A Nguyen A d'Oliveira A B O'Shaughnessy K Peng K C Perera L P Purohit M V Quinn B Radeztsky S Rafatian A Reay N W Reidy J J dos Reis A C Rubin H A Sanders D A |
| Institution: | Centro Brasiliero de Pesquisas Físicas, Rio de Janeiro, Brazil. |
| Abstract: | We have studied the diffractive dissociation into dijets of 500 GeV/c pions scattering coherently from carbon and platinum targets. Extrapolating to asymptotically high energies (where t(min)-->0), we find that when the per-nucleus cross section for this process is parametrized as sigma = sigma0Aalpha, alpha has values near 1.6, the exact result depending on jet transverse momentum. These values are in agreement with those predicted by theoretical calculations of color-transparency. |
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