This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
2017:groups:np:eftinterference [2017/06/20 00:17] haiying.cai |
2017:groups:np:eftinterference [2017/06/21 16:19] francesco.riva |
||
---|---|---|---|
Line 5: | Line 5: | ||
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 (or any extra vector) emission would alter the helicity structure and is part of the higher order contribution. | 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 (or any extra vector) emission would alter the helicity structure and is part of the higher order contribution. | ||
+ | |||
+ | We focus on the operator that generates transverse helicity, schematically O_3W= W_{munu}^3 | ||
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)]] | ||
+ | * "Testing gluon selfinteractions in three jet events at hadron colliders" [[https://arxiv.org/abs/hep-ph/9312363| (arXiv)]] | ||
+ | |||
+ | Helicity amplitude from madgraph (2 to 2 and 2 to 3): | ||
+ | - https://phystev.cnrs.fr/wiki/_media/2017:groups:np:ee_ww_sm_only.tgz | ||
+ | - https://phystev.cnrs.fr/wiki/_media/2017:groups:np:ee_ww_int_only.tgz | ||
+ | - https://phystev.cnrs.fr/wiki/_media/2017:groups:np:ee_ww_sm_dim6.tgz | ||
+ | |||
+ | |||
+ | Benchmark parameters from CLIC [https://arxiv.org/abs/1608.07537 -- Updated baseline for a staged Compact Linear Collider] | ||
+ | |||
+ | accelerator design foresees 80% electron polarisation. | ||
+ | |||
+ | stages running with different CME and luminosity: | ||
+ | {{:2017:groups:np:clic.jpg?direct&400|}} | ||