the successive iterations improve the fit, the procedure turns out to be insufficient to make a reliable fit with the Sudakov resummation.

   $\mathcal{F}_{0}$   BFKL   BFKL+C   BFKL+D   BFKL+CD   BFKL+CR
  ------------------- ------ -------- -------- --------- ---------
          EXP          2.4     2.2      1.24     1.11      1.52
          POW          2.3     1.9      1.02     1.12    
          Pgg           –       –       1.13     1.11    

  : The values of [$\chi^{2}\!/\mathrm{NDP}$]{}for fits of unintegrated gluon density evolving according to various models described in Section \[sec:evolution\_eqs\]. The first column lists the initial condition ansatz, see also Section \[sec:evolution\_eqs\] for details.\[tab:chi2\]

       model         $N$       $A$       $a$
  --------------- --------- --------- ---------
   BFKL+CR (EXP)   $0.095$   $0.012$    $0^*$
   BFKL+D (EXP)    $0.37$    $0.18$    $0.5^*$
   BFKL+CD (EXP)   $0.68$    $0.14$    $2.5^*$
   BFKL+C (POW)     $320$     $1.4$    $61.0$
   BFKL+D (POW)    $12.7$    $0.5^*$    $5.7$
   BFKL+CD (POW)    $562$    $0.96$    $35.7$
   BFKL+D (Pgg)     $106$     $1.2$     $2.5$
   BFKL+CD (Pgg)    $628$     $2.9$     $5.7$

  : The values of initial condition \[enu:Models\_ini\]-\[enu:Models\_fini\] parameters obtained from the fits to the CMS data. We list only the scenarios with ${\ensuremath{\chi^{2}\!/\mathrm{NDP}}\xspace}< 2$. The values denoted by a star were fixed — see the main text for details.\[tab:params\]

A few comments are in order. The considered jet data are not sufficient to precisely determine all the parameters ($N$, $A$, $a$, $D$) of the initial parametrizations (\[eq:param\]). Thus, first 