Can One Use Mueller-Navelet Jets at LHC as a Clean Test of QCD Resummation Effects at High Energy?§

Fig.(5) Comparison of the full NLL BFKL calculation including the scale uncertainty with CMS data, using symmetric cuts defined in Eq. (13). Left: value of <cos2φ>/ <cosφ> as a function of the rapidity separation Y. Right: value of <cos 3φ>/ <cos2φ> as a function of the rapidity separation Y.