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2017:groups:np:eftinterference [2017/06/17 09:18] ken.mimasu |
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- | ====== Non-interference in dimension 6 EFT: beyond LO & 2->2 processes ====== | + | ====== Non-interference in dimension 6 EFT: beyond LO & 2 to 2 processes ====== |
- | People interested: Francesco Riva, Ken Mimasu | + | People interested: Francesco Riva, Ken Mimasu, Benjamin Fuks |
- | Investigate the impact of higher order corrections or additional radiation on high energy 2->2 processes involving dimension 6 EFT operators that have been shown not to interfere at leading order. | + | Investigate the impact of higher order corrections or additional radiation on high energy 2->2 processes involving dimension 6 EFT operators that have been shown not to interfere at leading order. |
+ | |||
+ | A simple test case may be $W^+ W^-$ production at a lepton collider. Here the EW corrections including dimension 6 operators have not been calculated but an extra photon emission would alter the helicity structure and is part of the higher order contribution. | ||
References: | References: | ||
* "Helicity selection rules and noninterference for BSM amplitudes" [[https://arxiv.org/abs/1607.05236| (arXiv)]] | * "Helicity selection rules and noninterference for BSM amplitudes" [[https://arxiv.org/abs/1607.05236| (arXiv)]] | ||
+ | * Rivet tool implementing stage 1 and 0 selections maintained by LHCHXSWG [[https://svnweb.cern.ch/cern/wsvn/lhchiggsxs/repository/TemplateXS/| (link)]] |