Jet fragmentation as a tool to explore double parton scattering using Z − boson + jets processes at the LHC

The Large Hadron Collider witnesses the highest ever production cross section of double parton scattering processes. The production of a Z-boson along with two jets from double parton scattering provides a unique opportunity to explore the kinematics of double parton scattering processes and their d...

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Bibliographic Details
Published in:Physical review. D 2019-05, Vol.99 (9), p.094025, Article 094025
Main Authors: Kumar, R., Bansal, M., Bansal, S.
Format: Article
Language:English
Subjects:
Computer simulation
Dependence
Discrimination
Fragmentation
Jets
Kinematics
Large Hadron Collider
Monte Carlo simulation
Properties (attributes)
Scattering
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Summary:The Large Hadron Collider witnesses the highest ever production cross section of double parton scattering processes. The production of a Z-boson along with two jets from double parton scattering provides a unique opportunity to explore the kinematics of double parton scattering processes and their dependence on the scale of the second interaction. The experimental measurement of this process is largely contaminated by Z+jets production from single parton scattering. In this paper, fragmentation properties of a jet are explored to check their sensitivity toward double parton scattering. The present study is performed using simulated Z+jets events, produced with madgraph and powheg Monte-Carlo event generators, hadronized and parton showered using pythia8. The effect of different hadronization models on the discrimination based on the fragmentation properties of a jet is also investigated by using events simulated with herwig++. It is observed that discrimination based on the fragmentation properties of a jet can significantly suppress the background from single parton scattering, which results into 40%–50% gain in the contribution of double parton scattering.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.99.094025