Spotting hidden sectors with Higgs binoculars

• Verfasst von: Blanke, Monika [VerfasserIn]
• Verfasst von: Kast, Simon [VerfasserIn]
• Verfasst von: Thompson, Jennifer M. [VerfasserIn]
• Verfasst von: Westhoff, Susanne [VerfasserIn]
• Verfasst von: Zurita, José [VerfasserIn]
• Titel: Spotting hidden sectors with Higgs binoculars
• Verf.angabe: Monika Blanke, Simon Kast, Jennifer M. Thompson, Susanne Westhoff, and José Zurita
• E-Jahr: 2019
• Jahr: 30 Apr 2019
• Umfang: 20 S.
• Fussnoten: Gesehen am 11.09.2020
• Titel Quelle: Enthalten in: De.arxiv.org
• Ort Quelle: [S.l.] : Arxiv.org, 1991
• Jahr Quelle: 2019
• Band/Heft Quelle: (2019) Artikel-Nummer 1901.07558, 20 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: High Energy Physics - Experiment
• Sach-SW: High Energy Physics - Phenomenology
• K10plus-PPN: 158769039X

Abstract

We explore signals of new physics with two Higgs bosons and large missing transverse energy at the LHC. Such a signature is characteristic of models for dark matter or other secluded particles that couple to the standard model through an extended scalar sector. Our goal is to provide search strategies and an interpretation framework for this new signature that are applicable to a large class of models. To this end, we define simplified models of hidden sectors leading to two different event topologies: symmetric decay, i.e., pair-produced mediators decaying each into a Higgs plus invisible final state; and di-Higgs resonance, i.e., resonant Higgs-pair production recoiling against a pair of invisible particles. For both scenarios, we optimize the discovery potential by performing a multivariate analysis of final states with four bottom quarks and missing energy, employing state-of-the art machine learning algorithms for signal-background discrimination. We determine the parameter space that the LHC can test in both scenarios, thus facilitating an interpretation of our results in terms of complete models. Di-Higgs production with missing energy is competitive with other missing energy searches and thus provides a new opportunity to find hidden particles at the LHC.