Azimuthal decorrelation of forward and backward jets at the Tevatron

Abstract

We analyse the azimuthal decorrelation of Mueller-Navelet dijets produced in the collisions at Tevatron energies using a BFKL framework which incorporates dominant subleading effects. We show that these effects significantly reduce the decorrelation yet they are still insufficient to give satisfactory description of experimental data. However a good description of the data is obtained after incorporating within formalism the effective rapidity defined by Del Duca and Schmidt.

Figures (4)

• Figure 1: $\omega_m^0(\nu)$, for $0\le m \le 4$. In decreasing order, the curves correspond to $m = 0, 1, \ldots 4$.
• Figure 2: Azimuthal decorrelation of the forward and backward jets for two rapidity separation intervals: (a) $2.5 < \Delta\eta < 3.5$, (b) $4.5 < \Delta\eta < 5.5$. The D0 data TEVDATA are shown by points with errorbars. The BFKL (LO) and BFKL (CC) predictions are shown by triangles and circles respectively.
• Figure 3: As for Fig. 2 but with the effective rapidity $\hat{y}$ of (\ref{['eq:a12']}) incorporated in the BFKL predictions.
• Figure 4: The average value of $\cos\phi$ for various $\Delta\eta$ intervals. The D0 data (points with errorbars) compared with the BFKL LO calculations (triangles) and with the BFKL CC calculations (circles). The band between the $\Delta\eta$ axis and the dotted line represents the correlated systematic error of the data.