skip to main content


Title: Azimuthal decorrelation of jets widely separated in rapidity in pp collisions at $$\sqrt{s} =$$ 7 TeV

The decorrelation in the azimuthal angle between the most forward and the most backward jets (Mueller-Navelet jets) is measured in data collected in pp collisions with the CMS detector at the LHC at $$\sqrt{s} =$$ 7 TeV. The measurement is presented in the form of distributions of azimuthal-angle differences, $$\Delta\phi$$, between the Mueller-Navelet jets, the average cosines of $$(\pi-\Delta\phi)$$, $$2(\pi-\Delta\phi)$$, and $$3(\pi-\Delta\phi)$$, and ratios of these cosines. The jets are required to have transverse momenta, $$p_{\mathrm{T}}$$, in excess of 35 GeV and rapidities, $| y |$, of less than 4.7. The results are presented as a function of the rapidity separation, $$\Delta{y}$$, between the Mueller-Navelet jets, reaching $$\Delta{y}$$ up to 9.4 for the first time. Lastly, the results are compared to predictions of various Monte Carlo event generators and to analytical predictions based on the DGLAP and BFKL parton evolution schemes.
  1. Yerevan Physics Institute, Yerevan (Armenia). et al.
Publication Date:
Report Number(s):
FERMILAB-PUB-16-022-CMS; CMS-FSQ-12-002; CERN-PH-EP-2015-309; arXiv:1601.06713
Journal ID: ISSN 1029-8479; 1416827
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal ID: ISSN 1029-8479
Springer Berlin
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
CMS Collaboration
Country of Publication:
United States
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Hadron-Hadron scattering (experiments); proton-proton scattering; forward physics; jets; particle correlations and fluctuations
OSTI Identifier: