2020/08/31 by M. Grossi, J. Novak, B. Kersevan +2 · 27 citations
Physics and Astronomy · #Boson #Higgs boson #High-Energy Particle Collisions Research #Kinematics #Particle physics theoretical and experimental studies #Physics beyond the Standard Model #Polarization (electrochemistry) #Quantum Chromodynamics and Particle Interactions #Scattering #Unitarity #Vector boson #hep-ph
paper · pdf · doi:10.1140/epjc/s10052-020-08713-1
published in The European Physical Journal C 80(12) (Springer Science+Business Media) · 15 pages, 17 figures
openalex created_date 2020/08/18 · openalex publication_date 2020/12/01 · arxiv created 2020/12/02 · arxiv updated 2020/12/15 · openalex updated_date 2026/08/05
Abstract Measuring longitudinally polarized vector boson scattering in \mathrm WW <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>WW</mml:mi> </mml:math> channel is a promising way to investigate unitarity restoration with the Higgs mechanism and to search for possible physics beyond the Standard Model. In order to perform such a measurement, it is crucial to develop an efficient reconstruction of the full \mathrm W <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>W</mml:mi> </mml:math> boson kinematics in leptonic decays with the focus on polarization measurements. We investigated several approaches, from traditional ones up to advanced deep neural network structures, and we compared their abilities in reconstructing the \mathrm W <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>W</mml:mi> </mml:math> boson reference frame and in consequently measuring the longitudinal fraction \mathrm W_\text L <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>W</mml:mi> <mml:mtext>L</mml:mtext> </mml:msub> </mml:math> in both semi-leptonic and fully-leptonic \mathrm WW <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>WW</mml:mi> </mml:math> decay channels.