Signatures of anomalous Higgs couplings in angular asymmetries of H→Zℓ+- and e+e-→HZ

M. Beneke, D. Boito, Y. M. Wang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Parametrizing beyond Standard Model physics by the SU(3)×SU(2)L×U(1)Y dimension-six effective lagrangian, we study the impact of anomalous Higgs couplings in angular asymmetries of the crossing symmetric processes H→Zℓ+- and e+e-→HZ. In the light of present bounds on d = 6 couplings, we show that some asymmetries can reveal BSM effects that would otherwise be hidden in other observables. The d=6 HZγ couplings as well as (to a lesser extent) HZℓℓ contact interactions can generate asymmetries at the several percent level, albeit having less significant effects on the di-lepton invariant mass spectrum of the decay H→Zℓ+-. The higher di-lepton invariant mass probed in e+e-→HZ can lead to complementary anomalous coupling searches at e+e- colliders.

Original languageEnglish
Pages (from-to)846-851
Number of pages6
JournalNuclear and Particle Physics Proceedings
Volume273-275
DOIs
StatePublished - 1 Apr 2016

Keywords

  • Beyond Standard Model physics
  • Dimension-six effective Lagrangian
  • Higgs physics

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