Exclusive <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi><mml:mo stretchy="false">/</mml:mo><mml:mi mathvariant="normal">Ψ</mml:mi></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">Ψ</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>2</mml:mn><mml:mi>s</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:math> photo-production as a probe of QCD low <mml:math xmlns:mml="http://www.w3.…

We investigate photo-production of vector mesons J/Psi and Psi(2s), based on both HERA LHC data, using 2 fits unintegrated gluon distributions. The latter are subject to non-linear Balitsky-Kovchegov evolution (Kutak-Sapeta gluon; KS) linear next-to-leading order Balitsky-Kuraev-Fadin-Lipatov (Hentschinski-Sabio Vera-Salas; HSS gluon) respectively. Apart from extending previous studies the case radially excited charmonium we further use an improved set wave functions provide estimate uncertainties associated with gluon. While observe that difference between somehow diminishes a clear distinction KS is no longer possible currently available data-set, find differences distributions enhanced for ratio cross-sections Psi(2s) mesons.