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Extracting the Distribution Amplitudes of the rho meson from the Color Glass Condensate

By J. R. Forshaw and R. Sandapen


We extract the leading twist-2 and subleading twist-3 Distribution Amplitudes (DAs) of the rho meson using the HERA data on diffractive rho photoproduction. We do so using several Colour Glass Condensate (CGC) inspired and a Regge inspired dipole models. We find that our extracted twist-2 DA is not much model dependent and is consistent with QCD Sum Rules and lattice predictions. The extracted twist-3 DA is more model dependent but is still consistent with the Sum Rules prediction.Comment: 21 pages, 10 figures, 3 tables. Section 6 revised, figures 8 and 9 and table 3 updated. Conclusions essentially unchange

Topics: High Energy Physics - Phenomenology
Publisher: 'Springer Science and Business Media LLC'
Year: 2011
DOI identifier: 10.1007/JHEP10(2011)093
OAI identifier:

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