Better Higgs-CP tests through information geometry

• Verfasst von: Brehmer, Johann [VerfasserIn]
• Verfasst von: Plehn, Tilman [VerfasserIn]
• Verfasst von: Kling, Felix [VerfasserIn]
• Titel: Better Higgs-CP tests through information geometry
• Verf.angabe: Johann Brehmer, Felix Kling, Tilman Plehn, and Tim M. P. Tait
• E-Jahr: 2018
• Jahr: 16 May 2018
• Umfang: 20 S.
• Fussnoten: Gesehen am 01.12.2020
• Titel Quelle: Enthalten in: Physical review
• Ort Quelle: Woodbury, NY : Inst., 2016
• Jahr Quelle: 2018
• Band/Heft Quelle: 97(2018), 9, Artikel-ID 095017
• ISSN Quelle: 2470-0029
• DOI: doi:10.1103/PhysRevD.97.095017
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1585728063

Abstract

Measuring the CP symmetry in the Higgs sector is one of the key tasks of the LHC and a crucial ingredient for precision studies, for example in the language of effective Lagrangians. We systematically analyze which LHC signatures offer dedicated CP measurements in the Higgs-gauge sector and discuss the nature of the information they provide. Based on the Fisher information measure, we compare the maximal reach for CP-violating effects in weak boson fusion, associated ZH production, and Higgs decays into four leptons. We find a subtle balance between more theory-independent approaches and more powerful analysis channels, indicating that rigorous evidence for CP violation in the Higgs-gauge sector will likely require a multistep process.