**
1998 Monte Carlo Number Scheme**
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(8 pages)
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This is a revised Monte Carlo particle numbering scheme based on a proposal from the 1995 LEP II Workshop.

A comparison of the new (1998) particle numbers and the old (1996) numbers is given in the following Postscript files:

- List of elementary and miscellaneous particles (6 page PostScript file)
- List of mesons (10 page PostScript file)
- List of baryons (4 page PostScript file)

The lists of particle numbers are maintained by the StdHep Monte Carlo Standardization project at Fermilab as part of a system to facilitate translation between different Monte Carlo event generators and detector simulators. The "List of elementary and miscellaneous particles" contains a few specialized codes beginning with 99 which are needed for particular event generators, but which are not included in the list of PDG particle numbers.