Small x phenomenology on gluon evolution through the BFKL equation in light of a constraint in multi-Regge kinematics

Pragyan Phukan,Madhurjya Lalung,Jayanta Kumar Sarma

Figure 10. Prediction for proton structure function FL. Data is taken from HERA H1 [32] and ZEUS [29]. The background contribution is given by (33) with ${F}_{L}^{{BG}}({x}_{0}=0.1)\approx 0.057$, 0.063, 0.071 and 0.073 corresponding to four Q2 values, namely 5 $\ {\mathrm{GeV}}^{2}$, 15 $\ {\mathrm{GeV}}^{2}$, 35 $\ {\mathrm{GeV}}^{2}$ and 45 $\ {\mathrm{GeV}}^{2}$.