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Compact Muon Solenoid
LHC, CERN

CMS-PAS-FSQ-12-002
Azimuthal angle decorrelations of jets widely separated in rapidity in pp collisions at sqrt{s} = 7 TeV
Abstract: The azimuthal angle decorrelations of jets most forward and backward in rapidity (Mueller-Navelet jets) are measured with data collected in pp collisions with the CMS detector at the LHC at $\sqrt{s} = 7$ TeV. The azimutal angle distributions, average cosines of the difference in azimuthal angle betweenMueller-Navelet jets, and ratios of the cosines are measured for jets with $p_{\mathrm{T}} > 35$ GeV and $\vert y \vert < 4.7$. The results are presented as a function of the rapidity separation $ \Delta y $ between jets, reaching a $ \Delta y $ up to 9.4 for the first time. The results are compared to predictions of various Monte-Carlo event generators and analytical predictions based on the DGLAP and BFKL parton evolution schemes. The measurements are also used to investigate effects of parton showering and multiparton interactions.
CMS Publications
Compact Muon Solenoid
LHC, CERN