Search for low-mass dilepton resonances in Higgs boson decays to four-lepton final states in proton-proton collisions at $$\sqrt{s}=13\,\text {TeV} $$ s = 13 TeV

• Main Authors: Tumasyan, A. (Author), Adam, W. (Author), Bergauer, T. (Author), Dragicevic, M. (Author), Erö, J. (Author), Valle, A. E. D. (Author), Frühwirth, R. (Author), Jeitler, M. (Author), Krammer, N. (Author), Lechner, L. (Author), Liko, D. (Author), Madlener, T. (Author), Mikulec, I. (Author), Pitters, F. M. (Author), Rad, N. (Author), Schieck, J. (Author), Schöfbeck, R. (Author), Spanring, M. (Author), Templ, S. (Author), Waltenberger, W. (Author)
• Format: Article
• Language: English
• Published: Springer Berlin Heidelberg, 2022-04-11T12:27:01Z.
• Subjects: Article
• Online Access: Get fulltext

 Abstract A search for low-mass dilepton resonances in Higgs boson decays is conducted in the four-lepton final state. The decay is assumed to proceed via a pair of beyond the standard model particles, or one such particle and a $${\mathrm{Z}}$$ Z boson. The search uses proton-proton collision data collected with the CMS detector at the CERN LHC, corresponding to an integrated luminosity of 137 $$\,\text {fb}^{-1}$$ fb - 1 , at a center-of-mass energy $$\sqrt{s} = 13\,\text {TeV} $$ s = 13 TeV . No significant deviation from the standard model expectation is observed. Upper limits at 95% confidence level are set on model-independent Higgs boson decay branching fractions. Additionally, limits on dark photon and axion-like particle production, based on two specific models, are reported.