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---------------------------------------------------------------------- FastJet ------- The FastJet package, written by Matteo Cacciari and Gavin Salam and Gregory Soyez, provides a fast implementation of several longitudinally invariant sequential recombination jet algorithms, in particular the longitudinally invariant kt jet algorithm, the inclusive longitudinally invariant version of the Cambridge/Aachen jet-algorithm, and the inclusive anti-kt algorithm. The implementation is based on the geometrical methods described in M. Cacciari and G.P. Salam, Phys. Lett. B 641 (2006) 57 [hep-ph/0512210]. The full FastJet manual is available as doc/fastjet-doc.tex and also as arXiv:1111.6097. Means are also provided for accessing external jet-algorithm software via a common (plugin) interface and the package notably includes SISCone, an infrared safe seedless stable-cone type algorithm introduced in G.P. Salam and G. Soyez, JHEP 0705 (2007) 086 [arXiv:0704.0292]. Various tools are also provided related to jet areas and subtraction. They can be used with any infrared safe jet algorithm, both native and plugin. The ideas behind them are described in M. Cacciari, G.P. Salam, Phys.Lett.B 659 (2008) 119 [arXiv:0707.1378], and M. Cacciari, G.P. Salam and G. Soyez, JHEP 0804 (2008) 005 [arXiv:0802.1188] Tools are also provided to facilitate jet substructure analyses. ---------------------------------------------------------------------- Installation ------------ Installation instructions are provided in the INSTALL file. Note that to benefit from NlnN implementation (relevant for a number of particles N greater than 15000 roughly) of the kt (and anti-kt) jet algorithm , you will need to download CGAL from http://www.cgal.org/ and compile it before compiling the FastJet library. The NlnN implementation of the Cambridge/Aachen jet-algorithm is independent of CGAL. Automatic documentation can be generated by running the doxygen command (if not installed on your system see www.doxygen.org) in the main directory. It will create the html/ and latex/ directories containing detailed documentation of all classes etc.. More standard documentation is to be found in the doc/ directory. ---------------------------------------------------------------------- Directory structure ------------------- doc/ Documentation src/ the .cc files for the FastJet library include/ the include (.hh) files for the FastJet library example/ contains example programs (list them with "ls -1 [0-9]*.cc") example/data/ contains files with data for example events example/root/ an example root script to show jets as calorimeter towers plugins/ the various plugin jet algorithms tools/ location for a number of the tools (substructure, etc.) fortran_wrapper/ an illustration of how to use fastjet from fortran ---------------------------------------------------------------------- Known bugs ---------- See the BUGS file as well as the web page, http://fastjet.fr/ for information discovered subsequent to the release.
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