Abstract
In experiments at future lepton colliders at the energy frontier (ILC, CLIC), high-performance reconstruction of jets is crucial for precision measurements of the interactions and properties of the Higgs boson and top quark. We present a sequential recombination algorithm and show that its performance in several benchmark channels is much more robust under the expected γγ→hadrons background levels at the ILC and CLIC. The algorithm achieves similar or better performance than the longitudinally invariant kt algorithm and classical e+e− algorithms, while maintaining the natural distance criterion for lepton colliders.
Highlights
Experiments at lepton and hadron colliders use jet algorithms to cluster the collimated sprays of particles that form in processes with asymptotically free quarks and gluons in the final state
In this Letter we explore which jet reconstruction algorithms are most suitable for the e+e− colliders with a center-of-mass energy from 100 GeV to several TeV
We propose a new clustering jet reconstruction algorithm for future e+e− colliders that maintains a Durham-like distance criterion based on [energy, polar angle] and can compete with the robustness against background of the longitudinally invariant kt algorithm
Summary
Experiments at lepton and hadron colliders use jet algorithms to cluster the collimated sprays of particles that form in processes with asymptotically free quarks and gluons in the final state. Sequential recombination algorithm were adapted to the environment at hadron colliders in the early 1990s. A linear e+e− collider can attain center-of-mass energies from several 100 GeV to several TeV [3, 4]. Preprint submitted to Elsevier energy of approximately 350 GeV [5] is explored, as well as a muon collider [6]. Such machines present an environment that differs in several important respects from that encountered at the Z-pole. In this Letter we explore which jet reconstruction algorithms are most suitable for the e+e− colliders with a center-of-mass energy from 100 GeV to several TeV.
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