Measurement of the hadronic activity in events with a Z and two jets and extraction of the cross section for the electroweak production of a Z with two jets in pp collisions at $$ \sqrt{s}=7 $$ TeV
The first measurement of the electroweak production cross section of a Z boson with two jets (Zjj) in pp collisions at $$\sqrt{s}$$ = 7 TeV is presented, based on a data sample recorded by the CMS experiment at the LHC with an integrated luminosity of 5 inverse femtobarns. The cross section is measured for the lljj (l = e, $$\mu$$) final state in the kinematic region $$m_{ll} \gt$$ 50 GeV, $$m_{jj} \gt$$ 120 GeV, transverse momenta $$p_T^{j} \gt$$ 25 GeV and pseudorapidity abs($$\eta^{j}$$) $$\lt$$ 4.0. The measurement, combining the muon and electron channels, yields $$\sigma$$ = 154 +/- 24 (stat.) +/- 46 (exp. syst.) +/- 27 (th. syst.) +/- 3 (lum.) fb, in agreement with the theoretical cross section. The hadronic activity, in the rapidity interval between the jets, is also measured. These results establish an important foundation for the more general study of vector boson fusion processes, of relevance for Higgs boson searches and for measurements of electroweak gauge couplings and vector boson scattering.
- 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:
- The CMS collaboration
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1402849
- Report Number(s):
- FERMILAB-PUB-13-243-CMS; CMS-FSQ-12-019; CERN-PH-EP-2013-060; arXiv:1305.7389; 1236361
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2013, Issue 10; ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
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