1-T 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 Ratio 0.2 0.4 0.6 0.8 1 1.2 1.4 = 200 GeV s = 900 GeV s = 10 TeV s 1-T 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 CTEQ $^{)}$t,j  p j /mean ($_{ZEUS}$ $^{)}$t,i  p i mean ( 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 = 200 GeV s = 900 GeV s = 10 TeV s 1-T 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 CTEQ /mean (Recoil)$_{ZEUS}$ mean (Recoil) 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 = 200 GeV s = 900 GeV s = 10 TeV s distribution of CTEQ5L the chance of getting a collision of two partons of similar momentum is more probable, hence resulting in a larger probability that the resulting jets be contained within the acceptance. The bulk sphericity distributions of several parameters exhibit marked dependence on the gluon PDF used for the computation. As the PDFs for low x$_{B}$ have a larger uncertainty we believe that the present results point to a possibility to further refine gluon PDFs at low x$_{B}$ using the approach presented. In the course of this work we have also tried to check the dependence of the parameters on different fragmentation functions used. The results however do not demonstrate a similar depen- dence as for the PDFs. As one can expect, varying the fragmentation functions one affects slightly the absolute 1-T 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 ch mean N 2 4 6 8 10 12 14 16 18 20 22 24 200 GeV, CTEQ5L 200 GeV, ZEUS 900 GeV, CTEQ5L 900 GeV, ZEUS 10 TeV, CTEQ5L 10 TeV, ZEUS x 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 CTEQ ch  / mean N ZEUS ch mean N 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 = 200 GeV s = 900 GeV s = 10 TeV s FIG. 2: top: Mean multiplicity in the pseudo rapidity range ± 0 . 9 obtained at the three energies and the two PDFs in function of the sphericity variable. Bottom: ratio of the mean multiplicities for the two PDF’s used for the three energies, again in function of the sphericity variable. FIG. 3: Ratio of sphericity distributions at different energies FIG. 5: Ratio of the mean recoil values for two PDF’s versus sphericity calculated for 3 energies. FIG. 4: Ratio of mean total transverse momenta for the two PDFs versus sphericity calculated for 3 energies 3 V. CONCLUSION