QCD Radiation in the Production of High s-hat Final States

Details QCD Radiation in the Production of High s-hat Final States QCD Radiation in the Production of High s-hat Final States

2005-11-28

arxiv.org/abs/hep-ph/0511306v1

ECONF C0508141:ALCPG0417,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

Invited talk at 2005 International Linear Collider Physics and Detector Workshop and Second ILC Accelerator Workshop, Snowmass

Scientific paper

In the production of very heavy final states - high Mandelstam s-hat - extra QCD radiation can play a significant role. By comparing several different parton shower approximations to results obtained with fixed-order perturbation theory, we quantify the degree to which these approaches agree (or disagree), focussing on initial state radiation above pT = 50 GeV, for top pair production at the Tevatron and at the LHC, and for SUSY pair production at the LHC. Special attention is paid to ambiguities associated with the choice of the maximum value of the ordering variable in parton shower models.

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