Year-end Sale % OFF 
Abstract
Measuring longitudinally polarized vector boson scattering in mathrm {WW} 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} 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} boson reference frame and in consequently measuring the longitudinal fraction mathrm {W}_{text {L}} in both semi-leptonic and fully-leptonic mathrm {WW} decay channels.
Highlights
IntroductionThe Vector Boson Scattering (VBS) measurement is extremely challenging, because of its low signal yields, complex final states and large backgrounds
Random Selection 1 Selection 2 Selection 3 Selection 4 Binary Regression Truth0.119 0.135 0.122 0.128 0.095 0.102 0.071 0.101 flat, or that we had to increase the number of training epochs suggesting complex convergence structure
From traditional ones up to advanced deep neural network structures, and we compared their abilities in reconstructing the W boson reference frame and in measuring the longitudinal fraction W boson is longitudinally (WL) in both semi-leptonic and fully-leptonic WW decay channels
Summary
The VBS measurement is extremely challenging, because of its low signal yields, complex final states and large backgrounds. At the LHC, the dominant VBS processes result in final states with two gauge bosons and two jets (VV j j). Studies have shown that the same-sign W±W± j j production has the largest VBS contribution to the production cross section [9], because tree-level Feynman diagrams not involving the self interactions are absent in the s−channel and suppressed in other channels. The same-sign W±W± j j production is well suited for EWSB and new physics studies involving VBS at the LHC. The studies presented have been performed on a VBS prototype analysis, to demonstrate the validity of the approach, but the same strategies can be implemented in any ATLAS and CMS analysis which involves VBS and/or W bosons
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
