On the Range of Validity of the Dipole Picture

Understand

We derive correlated bounds on ratios of deep inelastic structure functions from the dipole picture of photon-hadron scattering at high energies.

• In particular we consider ratios of the longitudinal structure function, the total structure function and the charm part of the latter.
• We also consider ratios of total structure functions taken at the same energy but at three different photon virtualities.
• It is shown that by confronting these bounds with experimental data we can significantly constrain the range of validity of the dipole picture.