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arXiv · 1712.01310

Electroweak Precision Tests in High-Energy Diboson Processes

Roberto Franceschini·Giuliano Panico·Alex Pomarol·Francesco Riva·Andrea Wulzer
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Abstract

A promising avenue to perform precision tests of the SM at the LHC is to measure differential cross-sections at high invariant mass, exploiting in this way the growth with the energy of the corrections induced by heavy new physics. We classify the leading growing-with-energy effects in longitudinal diboson and in associated Higgs production processes, showing that they can be encapsulated in four real "high-energy primary" parameters. We assess the reach on these parameters at the LHC and at future hadronic colliders, focusing in particular on the fully leptonic $WZ$ channel that appears particularly promising. The reach is found to be superior to existing constraints by one order of magnitude, providing a test of the SM electroweak sector at the per-mille level, in competition with LEP bounds. Unlike LHC Run-1 bounds, which only apply to new physics effects that are much larger than the SM in the high-energy tail of the distributions, the probe we study applies to a wider class of new physics scenarios where such large departures are not expected.

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Roberto Franceschini, Giuliano Panico, Alex Pomarol, Francesco Riva, Andrea Wulzer. 2018-06-08. Electroweak Precision Tests in High-Energy Diboson Processes. https://doi.org/10.1007/jhep02(2018)111

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