Abstract
Measurements of differential cross sections are presented for the production of a Z boson and at least one hadronic jet in proton-proton collisions at sqrt(s) = 7 TeV, recorded by the CMS detector, using a data sample corresponding to an integrated luminosity of 4.9 inverse femtobarns. The jet multiplicity distribution is measured for up to six jets. The differential cross sections are measured as a function of jet transverse momentum and pseudorapidity for the four highest transverse momentum jets. The distribution of the scalar sum of jet transverse momenta is also measured as a function of the jet multiplicity. The measurements are compared with theoretical predictions at leading and next-to-leading order in perturbative QCD.
Highlights
Measurements of the production cross section of a Z boson with one or more jets in hadron collisions, hereafter Z þ jets, can be compared with predictions of perturbative quantum chromodynamics
Next-to-leading order (NLO) matrix elements have been interfaced with parton showers for final states of fixed jet multiplicity
We present fiducial cross sections for Z þ jets production as a function of the exclusive and inclusive jet multiplicity, where the Z bosons are identified through their decays into electron or muon pairs
Summary
Measurements of the production cross section of a Z boson with one or more jets in hadron collisions, hereafter Z þ jets, can be compared with predictions of perturbative quantum chromodynamics (pQCD). Ideal for testing these different options for theoretical predictions This process contributes a large background to many standard model processes, like top production or diboson final states, e.g., the associated production of a Higgs boson and a Z, where the former decays in bbpairs and the second in charged leptons [5,6]. Searches for phenomena beyond the standard model may be sensitive to this process, which plays a important role as the main background in the study of supersymmetric scenarios with large missing transverse momentum This has been one of the main motivations for a previous analysis of the angular distributions in Z þ jets events presented by CMS [7], and the study presented in this paper is complementing it with the measurement of jet spectra. VIII the results are presented and theoretical predictions are compared to them
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
