期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 4, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP04(2020)082
关键词
Polarization; Electroweak interaction; Hadron-Hadron scattering (experiments); Beyond Standard Model; Top physics
资金
- Knut and Alice Wallenberg foundation [KAW 2017.0100]
- UCLouvain MOVE-IN Louvainscheme
- F.R.S.-FNRS Excellence of Science EOS be.h Project [30820817]
- VBSCan COST Action [CA16108]
- Fonds de la Recherche Scientifique de Belgique (F.R.S.-FNRS) [2.5020.11]
- Walloon Region
- European Union's Horizon 2020 research and innovation programme as part of the Marie Sklodowska-Curie Innovative Training Network MCnetITN3 [722104]
- University of Science and Technology of China, Institute of High Energy Physics
The anticipated experimental resolution and data cache of the High Luminosity Large Hadron Collider will enable precision investigations of polarization in multiboson processes. This includes, for the first time, vector boson scattering. To facilitate such studies, we report the automation of polarized matrix element computations in the publicly available Monte Carlo tool suite, MadGraph5_aMC@NLO. This enables scattering and decay simulations involving helicity-polarized asymptotic or intermediate states, preserving both spin-correlation and off-shell effects. As demonstrations of the method, we investigate the leading order production and decay of polarized weak gauge bosons in the process pp -> jjW lambda +W lambda '-, with helicity eigenstates (lambda, lambda ') defined in various reference frames. We consider the Standard Model at both O(alpha (4)) and O(alpha (2)alpha s2) as well as a benchmark composite Higgs scenario. We report good agreement with polarization studies based on the On-Shell Projection (OSP) technique. Future capabilities are discussed.
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