Event Generator For Rhic Spin Physics PDF Download

This volume contains the report of the RIKEN BNL Research Center workshop on ''Event Generator for RHIC Spin Physics'' held on September 21-23, 1998 at Brookhaven National Laboratory. A major objective of the workshop was to establish a firm collaboration to develop suitable event generators for the spin physics program at RHIC. With the completion of the Relativistic Heavy Ion Collider (RHIC) as a polarized collider a completely new domain of high-energy spin physics will be opened. The planned studies address the spin structure of the nucleon, tests of the standard model, and transverse spin effects in initial and final states. RHIC offers the unique opportunity to pursue these studies because of its high and variable energy, 50 (less-than or equal to) (square root)s (less-than or equal to) 500 GeV, high polarization, 70%, and high luminosity, 2 x 1032 cm−2 sec−1 or more at 500 GeV. To maximize the output from the spin program at RHIC, the understanding of both experimental and theoretical systematic errors is crucial. It will require full-fledged event generators, to simulate the processes of interest in great detail. The history of event generators shows that their development and improvement are ongoing processes taking place in parallel to the physics analysis by various experimental groups. The number of processes included in the generators has been increasing and the precision of their predictions has been being improved continuously. Our workshop aims at getting this process well under way for the spin physics program at RHIC, based on the fist development in this direction, SPHINX. The scope of the work includes: (1) update of the currently existing event generator by including the most recent parton parameterizations as a library and reflecting recent progress made for spin-independent generators, (2) implementation of new processes, especially parity violating effects in high energy pp collisions, (3) test of the currently available event generator by comparing to existing experimental data and analytical calculations for the unpolarized case, and (4) search for ways to improve the treatment of polarization for the fragmentation phase.