Eur. Phys. J. C (2006) 47: 611-616
https://doi.org/10.1140/epjc/s2006-02618-3

Experimental Physics

A new jet algorithm based on the k-means clustering for the reconstruction of heavy states from jets

HEP division, Argonne National Laboratory, 9700 S.Cass Avenue, Argonne, IL, 60439, USA

^* e-mail: chekanov@mail.desy.de

Received: 16 May 2006
Published online: 14 July 2006

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 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 k_T (Durham) algorithm. In addition, it is expected that the peak positions measured with the new algorithm have smaller systematical uncertainty.