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- W2012939227 abstract "We use dispersion relations to reconstruct, in a model-independent way, the formation dynamics of heavy quarkonium from the experimental data on ${e}^{+}{e}^{ensuremath{-}}ensuremath{rightarrow}overline{Q}Q$ annihilation. We extract a distribution of formation times with a mean value for the $J/ensuremath{psi},$ $〈{ensuremath{tau}}_{J/ensuremath{psi}}〉=0.44mathrm{fm};$ and for the ensuremath{Upsilon}, $〈{ensuremath{tau}}_{ensuremath{Upsilon}}〉=0.32mathrm{fm}.$ The corresponding widths of these distributions are given by $ensuremath{Delta}{ensuremath{tau}}_{J/ensuremath{psi}}=0.31mathrm{fm}$ and $ensuremath{Delta}{ensuremath{tau}}_{ensuremath{Upsilon}}=0.28mathrm{fm}.$ This information can be used as an input in modeling of heavy quarkonium production on nuclear targets." @default.
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- W2012939227 date "1999-09-17" @default.
- W2012939227 modified "2023-09-23" @default.
- W2012939227 title "Quarkonium formation time in a model-independent approach" @default.
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- W2012939227 doi "https://doi.org/10.1103/physrevc.60.041901" @default.
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