Springer : Jet reconstruction at high-energy electron–positron colliders

Garcia Garcia, Ignacio; Fuster Verdu, Juan; Vos, Marcel; Roloff, Philipp Gerhard; Boronat, Marca; Simoniello, Rosa

doi:10.1140/epjc/s10052-018-5594-6

Article
Report number	arXiv:1607.05039 ; CLICDP-PUB-2017-002
Title	Jet reconstruction at high-energy electron–positron colliders
Author(s)	Garcia Garcia, Ignacio (Univ. of Valencia and CSIC (ES)) ; Boronat, Marca (Univ. of Valencia and CSIC (ES)) ; Fuster Verdu, Juan (Univ. of Valencia and CSIC (ES)) ; Roloff, Philipp Gerhard (CERN) ; Simoniello, Rosa (Johannes-Gutenberg-Universitaet Mainz (DE)) ; Vos, Marcel (Univ. of Valencia and CSIC (ES))
Publication	2018-02-20
Imprint	2017-06-16
Number of pages	27
In:	Eur. Phys. J. C 78 (2018) 144
DOI	10.1140/epjc/s10052-018-5594-6
Subject category	Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology ; hep-ex
Accelerator/Facility, Experiment	CLIC
Study	CLICdp
Abstract	In this paper we study the performance in $e^+e^-$ collisions of classical $e^+e^-$ jet reconstruction algorithms, longitudinally invariant algorithms and the recently-proposed Valencia algorithm. The study includes a comparison of perturbative and non-perturbative jet energy corrections and the response under realistic background conditions. Several algorithms are benchmarked with a detailed detector simulation at $\sqrt{s}= 3$ \tev. We find that the classical $e^+e^-$ algorithms, with or without beam jets, have the best response, but are inadequate in environments with non-negligible background. The Valencia algorithm and longitudinally invariant $k_t$ algorithms have a much more robust performance, with a slight advantage for the former.
Copyright/License	arXiv nonexclusive-distrib. 1.0 Preprint: (License: CC-BY-4.0)

$The reconstructed Higgs boson mass peak in $e^+ e^- \rightarrow Z h$, $Z \rightarrow q \bar{q}$, $h \rightarrow b \bar{b}$ events. The three histograms correspond to centre-of-mass energies of 250~\gev{} (red, continuous line), 350~\gev{} (blue, dashed line) and 500~\gev{} (black, continuous line).$ $The fraction of the visible energy (the energy carried by all final state products except the photon) in several processes, where a photon radiated off the initial or final-state particles may accompany the final state products. The distributions correspond to pair production of light fermions in association with a photon ($e^+e^- \rightarrow f \bar{f} (\gamma)$), $W$-boson and top-quark pair production ($e^+e^- \rightarrow W^+W^-(\gamma)$, $e^+e^- \rightarrow t \bar{t} (\gamma)$) and the Higgsstrahlung process $e^+e^- \rightarrow Zh (\gamma)$. The centre-of-mass energy is indicated on the figure for each process.$ $The area or {\em footprint} of jets reconstructed with $R=$ 0.5 with the three major families of sequential recombination algorithms. The two shaded areas in each column correspond to a jet in the central detector ($\theta = \pi/2$) and to a forward jet ($\theta = 7\pi/8$). The jet axis is indicated with a cross.$ Show more plots

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