The next-to-minimal supersymmetric Standard Model (NMSSM) with a Higgs-singlet coupling lambda close to unity, moderate tan beta and stop masses below 1 TeV minimizes the fine-tuning of the electroweak scale, making it possible that the lightest new particles, except perhaps for the lightest supersymmetric particle, are part of the extended Higgs system. We show how the measurements of the couplings of the 126 GeV Higgs boson constrain the region of the physical parameters of a generic NMSSM most relevant to this context. In the same region of parameter space we determine the cross section for the production of a heavier CP-even scalar together with its total width and its most relevant branching ratios. For comparison we show the same analysis for the MSSM. We also comment on how a coupling lambda >= 1 can be compatible with gauge coupling unification.

Exploring the Higgs sector of a most natural NMSSM

BARBIERI, Riccardo;
2013

Abstract

The next-to-minimal supersymmetric Standard Model (NMSSM) with a Higgs-singlet coupling lambda close to unity, moderate tan beta and stop masses below 1 TeV minimizes the fine-tuning of the electroweak scale, making it possible that the lightest new particles, except perhaps for the lightest supersymmetric particle, are part of the extended Higgs system. We show how the measurements of the couplings of the 126 GeV Higgs boson constrain the region of the physical parameters of a generic NMSSM most relevant to this context. In the same region of parameter space we determine the cross section for the production of a heavier CP-even scalar together with its total width and its most relevant branching ratios. For comparison we show the same analysis for the MSSM. We also comment on how a coupling lambda >= 1 can be compatible with gauge coupling unification.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11384/4876
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 61
  • ???jsp.display-item.citation.isi??? 54
social impact