ME–PS matching in the simulation of multi-jet production in hadron collisions using a subtraction method
Shigeru Odaka (High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan); Norihisa Watanabe (High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan); Yoshimasa Kurihara (High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan)
The subtraction method for the matching between the matrix element (ME) and parton shower (PS), which has been developed for combining 0-jet and 1-jet production processes in association with electroweak-boson production in hadron collisions, is extended to multi-jet production. In order to include multi-jet MEs, we have to address the soft-gluon divergence together with the collinear divergence. We introduce an approximation that simultaneously reproduces both divergences in a form suitable for application to our subtraction method. The alteration in the subtraction can be compensated by applying an appropriate correction to the corresponding non-radiative events. We demonstrate that $W$ $+ $ 0, 1, and 2 jet production processes can be consistently combined using the developed matching method.
