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|Title:||Updating An Empirical Analysis On The Proton's Central Opacity And Asymptotia|
D. A.; Menon
M. J.; Silva
P. V. R. G.
|Abstract:||We present an updated empirical analysis on the ratio of the elastic (integrated) to the total cross section in the c.m. energy interval from 5 GeV to 8 TeV. As in a previous work, we use a suitable analytical parametrization for that ratio (depending on only four free fit parameters) and investigate three asymptotic scenarios: either the black disk limit or scenarios above or below that limit. The dataset includes now the datum at 7 TeV, recently reported by the ATLAS Collaboration. Our analysis favors, once more, a scenario below the black disk, providing an asymptotic ratio consistent with the rational value 1/3, namely a gray disk limit. Upper bounds for the ratio of the diffractive (dissociative) to the inelastic cross section are also presented.|
|Editor:||IOP Publishing Ltd|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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