# B1c : Central Jets in Vector-Boson Scattering

Principal Investigator
Prof. Dieter Zeppenfeld Karlsruhe Institute of Technology

### Subject

Vector-boson scattering (VBS) and vector-boson fusion (VBF) at the LHC are accompanied by two jets, arising from scattered quarks. The lack of color exchange between the quarks, i.e. the peculiar color structure of VBS/VBF processes, results in suppressed hadronic/jet activity between these jets, which can be used for signal identification. We plan to calculate distributions for this hadronic activity at NLO QCD for various VBS/VBF and background processes, matched to the parton shower simulation of event generators. This will result in a precision tool for the study of VBS and VBF.

### Topics

1. NLO QCD corrections for additional jet activity: NLO QCD corrections to VBF $V jjj$ production ($V = W, Z, \gamma$);NLO QCD corrections to VBS processes like $W +W +jjj$ or $W Zjjj$ production and QCD backgrounds; implementation in VBFNLO;
2. Interface to event generators: matching of NLO codes to parton shower programs within the Matchbox framework
3. Phenomenology of color flow observables: central jet veto strategies for VBF/VBS signal measurement; jet activity and particle flow as distinguishing features of VBF/VBS processes. Comparison with $V jjj$ and same sign W pair data. Precision assessment of these tools
4. Spinoffs: Dependence of VBS/VBF cross sections on tagging jet defini- tion/cone size beyond NLO QCD, comparison to scale uncertainties
This website uses cookies. By using the website, you agree with storing cookies on your computer. Also you acknowledge that you have read and understand our Privacy Policy. If you do not agree leave the website.More information about cookies