Abstract
In this work we present a new subtraction method for next-to-leading order calculations that is particularly convenient even when narrow resonances are present. The method is particularly suitable for the implementation of next-to-leading order calculations matched to parton shower generators. It allows at the same time for the inclusion of all finite width effects, including interferences, and for a consistent treatment of resonances in the shower approach, preserving the mass of resonances near their peak. We implement our method, in a fully general and automatic way, within the POWHEG BOX framework, and illustrate it using as a test case the process of pp → μ + ν μ j b j, that is dominated by t-channel single top production.
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ArXiv ePrint: 1509.09071
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Ježo, T., Nason, P. On the treatment of resonances in next-to-leading order calculations matched to a parton shower. J. High Energ. Phys. 2015, 1–47 (2015). https://doi.org/10.1007/JHEP12(2015)065
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DOI: https://doi.org/10.1007/JHEP12(2015)065