Abstract
A jet algorithm based on the k-means clustering procedure is proposed which can be used for the invariant-mass reconstruction of heavy states decaying to hadronic jets. The proposed algorithm was tested by reconstructing e+e-→tt̄→6 jets and e+e-→W+W-→4 jets processes at \(\sqrt{s}=500\,\mathrm{GeV}\) using a Monte Carlo simulation. It was shown that the algorithm has a reconstruction efficiency similar to traditional jet-finding algorithms, and leads to 25% and 40% improvement of the top-quark and W mass resolution, respectively, compared to the kT (Durham) algorithm. In addition, it is expected that the peak positions measured with the new algorithm have smaller systematical uncertainty.
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References
S. Moretti, L. Lonnblad, T. Sjostrand, JHEP 08, 001 (1998)
S. Chekanov, Proc. 14th Topical Conference on Hadron Collider Physics, (28 Sep–4 Oct 2002) Karlsruhe, Germany (2002); Also in preprint hep-ph/0211298
J.B. MacQueen, Proc. 5th Berkeley Symposium on Mathematical Statistics and Probability, p. 281. (1967)
T. Sjöstrand, Comp. Phys. Commun. 39, 347 (1986); T. Sjöstrand, L. Lönnblad, S. Mrenna, P. Skands, Preprint hep-ph/0308153 (2003)
S. Chekanov, V. Morgunov, Phys. Rev. D 67, 074011 (2003)
S. Catani, et al., Phys. Lett. B 269, 432 (1991)
J.M. Butterworth, J.P. Couchman, B.E. Cox, B.M. Waugh, Comput. Phys. Commun. 153, 85 (2003), Available on http://hepforge.cedar.ac.uk/ktjet/
S. Chekanov, Comp. Phys. Commun. 173, 115 (2005), Available on http://hepforge.cedar.ac.uk/runmc/
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Chekanov, S. A new jet algorithm based on the k-means clustering for the reconstruction of heavy states from jets. Eur. Phys. J. C 47, 611–616 (2006). https://doi.org/10.1140/epjc/s2006-02618-3
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DOI: https://doi.org/10.1140/epjc/s2006-02618-3