Abstract
We propose a new sequential jet reconstruction algorithm for future lepton colliders at the energy frontier. The Valencia algorithm combines the natural distance criterion for lepton colliders with the greater robustness against backgrounds of algorithms adapted to hadron colliders. Results on a detailed Monte Carlo simulation of tt¯ and ZZ production at future linear e+e− colliders (ILC and CLIC) with a realistic level of background overlaid, show that it achieves better performance in the presence of background than the classical algorithms used at previous e+e− 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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