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.

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      "title": "ME\u2013PS matching in the simulation of multi-jet production in hadron collisions using a subtraction method"
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      "value": "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."
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Published on:
11 May 2015
Publisher:
Oxford University Press/Physical Society of Japan
Published in:
Progress of Theoretical and Experimental Physics (2015)
Issue 5
DOI:
https://doi.org/10.1093/ptep/ptv059
arXiv:
1409.3334
Copyrights:
© The Author(s) 2015
Licence:
CC-BY-3.0

Fulltext files: