Heidelberg 2022 – scientific programme
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T: Fachverband Teilchenphysik
T 87: Electroweak Interactions (Exp.) 2
T 87.4: Talk
Thursday, March 24, 2022, 17:05–17:20, T-H18
Polarized same-sign W boson scattering at the CMS experiment — Thorsten Chwalek1, Nils Faltermann1, Abideh Jafari2, Thomas Müller1, and •Komal Tauqeer1 — 1Institut für Experimentelle Teilchenphysik (ETP), Karlsruher Institut für Technologie (KIT) — 2Deutsches Elektronen-Synchrotron (DESY), Hamburg
Polarized vector boson scattering (VBS) provides an opportunity for testing the Higgs mechanism in the electroweak sector of the standard model. At the LHC, the scattering of the weak gauge bosons can reveal the actual process by which they get their masses. In particular, the longitudinal polarized state of these bosons can reveal new information about the goldstone bosons of the electroweak symmetry breaking sector.
The most promising VBS channel for this type of study is same-sign WW scattering, which has a good balance between signal and backgrounds. In particular, the semi-leptonic decay channel provides a larger cross section than the fully leptonic decay channel; however, this channel faces large background contributions from V + jets process.
To increase the signal extraction, our study aims for advancements in the boosted W-jet tagging techniques to identify the W jet decaying into hadrons along with its charge and polarization. In this talk, I will discuss about the ongoing work to identify the W jet charge via ParticleNet algorithm.