Papers › A Positive Resampler for Monte Carlo Events with Negative Weights
A Positive Resampler for Monte Carlo Events with Negative Weights
Jeppe R. Andersen, Christian Gutschow, Andreas Maier, Stefan Prestel
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We propose the Positive Resampler to solve the problem associated with event samples from state-of-the-art predictions for scattering processes at hadron colliders typically involving a sizeable number of events contributing with negative weight. The proposed method guarantees positive weights for all physical distributions, and a correct description of all observables. A desirable side product of the method is the possibility to reduce the size of event samples produced by General Purpose Event Generators, thus lowering the resource demands for subsequent computing-intensive event processing steps. We demonstrate the viability and efficiency of our approach by considering its application to a next-to-leading order + parton shower merged prediction for the production of a W boson in association with multiple jets.
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