Composite Higgs models involving partial compositeness of standard model fermions typically require the introduction of fermionic partners which are relatively light in realistic scenarios. In this paper, we analyze the role of these light custodian fermions in the phenomenology of the composite Higgs models and show that they significantly modify couplings of the Higgs field. We focus on the coupling to gluons, in particular, which is of central importance for Higgs production at the LHC. We show that this coupling can be increased as well as decreased depending on the standard model fermion embedding in the composite multiplets. We also discuss modification of the Higgs couplings to bottom and top quarks and show that modifications to all three couplings-Hgg, H (t) over bart, and H (b) over barb-are generically independent parameters.

Light custodians and Higgs physics in composite models / Azatov, Aleksandr; Galloway, Jamison. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 85:5(2012), pp. 1-13. [10.1103/PhysRevD.85.055013]

Light custodians and Higgs physics in composite models

Azatov Aleksandr
;
2012

Abstract

Composite Higgs models involving partial compositeness of standard model fermions typically require the introduction of fermionic partners which are relatively light in realistic scenarios. In this paper, we analyze the role of these light custodian fermions in the phenomenology of the composite Higgs models and show that they significantly modify couplings of the Higgs field. We focus on the coupling to gluons, in particular, which is of central importance for Higgs production at the LHC. We show that this coupling can be increased as well as decreased depending on the standard model fermion embedding in the composite multiplets. We also discuss modification of the Higgs couplings to bottom and top quarks and show that modifications to all three couplings-Hgg, H (t) over bart, and H (b) over barb-are generically independent parameters.
85
5
1
13
055013
https://arxiv.org/abs/1110.5646
Azatov, Aleksandr; Galloway, Jamison
File in questo prodotto:
File Dimensione Formato  
PhysRevD.85.055013.pdf

non disponibili

Tipologia: Versione Editoriale (PDF)
Licenza: Non specificato
Dimensione 746.25 kB
Formato Adobe PDF
746.25 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

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/20.500.11767/66274
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 99
  • ???jsp.display-item.citation.isi??? 90
social impact