Inclusive four-jet production: a study of Multi-Regge kinematics and   BFKL observables
  A study of differential cross sections for the production of four jets in multi-Regge kinematics is presented, the main focus lying on azimuthal angle dependences. The theoretical setup consists in the jet production from a single BFKL ladder with a convolution of three BFKL Green functions, where two forward/backward jets are always tagged in the final state. Furthermore, the tagging of two further jets in more central regions of the detectors with a relative separation in rapidity from each other is requested. It is found, as result, that the dependence on the transverse momenta and the rapidities of the two central jets can be considered as a distinct signal of the onset of BFKL dynamics. 
Francesco Caporale, Francesco Giovanni Celiberto, Grigorios Chachamis,   Agust\'in Sabio Vera
hep-ph