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

Journal Article · Wed Aug 24 00:00:00 EDT 2016 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP08(2016)139· OSTI ID:1244436

Khachatryan, Vardan ^[1]

---

1. Yerevan Physics Institute, Yerevan (Armenia). et al.

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.

• Research Organization: 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 Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: CMS Collaboration
• Grant/Contract Number: AC02-07CH11359
• OSTI ID: 1244436
• Report Number(s): FERMILAB-PUB-16-022-CMS; CMS-FSQ-12-002; CERN-PH-EP-2015-309; arXiv:1601.06713; 1416827
• Journal Information: Journal of High Energy Physics (Online), Vol. 2016; ISSN 1029-8479
• Publisher: Springer Berlin
• Country of Publication: United States
• Language: English