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Di-boson signatures as standard candles for partial compositeness

Belyaev, Alexander S.; Cacciapaglia, Giacomo; Cai, Haiying; Ferretti, Gabriele; Flacke, Thomas; Parolini, Alberto and Serodio, Hugo LU (2017) In Journal of High Energy Physics 2017(1).
Abstract

Composite Higgs Models are often constructed including fermionic top partners with a mass around the TeV scale, with the top partners playing the role of stabilizing the Higgs potential and enforcing partial compositeness for the top quark. A class of models of this kind can be formulated in terms of fermionic strongly coupled gauge theories. A common feature they all share is the presence of specific additional scalar resonances, namely two neutral singlets and a colored octet, described by a simple effective Lagrangian. We study the phenomenology of these scalars, both in a model independent and model dependent way, including the bounds from all the available searches in the relevant channels with di-boson and di-top final states. We... (More)

Composite Higgs Models are often constructed including fermionic top partners with a mass around the TeV scale, with the top partners playing the role of stabilizing the Higgs potential and enforcing partial compositeness for the top quark. A class of models of this kind can be formulated in terms of fermionic strongly coupled gauge theories. A common feature they all share is the presence of specific additional scalar resonances, namely two neutral singlets and a colored octet, described by a simple effective Lagrangian. We study the phenomenology of these scalars, both in a model independent and model dependent way, including the bounds from all the available searches in the relevant channels with di-boson and di-top final states. We develop a generic framework which can be used to constrain any model containing pseudo-scalar singlets or octets. Using it, we find that such signatures provide strong bounds on the compositeness scale complementary to the traditional EWPT and Higgs couplings deviations. In many cases a relatively light scalar can be on the verge of discovery as a first sign of new physics.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Beyond Standard Model, Global Symmetries, Sigma Models, Technicolor and Composite Models
in
Journal of High Energy Physics
volume
2017
issue
1
publisher
Springer
external identifiers
  • scopus:85011371494
  • wos:000393672100003
ISSN
1126-6708
DOI
10.1007/JHEP01(2017)094
language
English
LU publication?
yes
id
81eec06d-d90d-4b42-a0c8-107b84e24d79
date added to LUP
2017-02-16 07:59:52
date last changed
2018-03-25 04:34:13
@article{81eec06d-d90d-4b42-a0c8-107b84e24d79,
  abstract     = {<p>Composite Higgs Models are often constructed including fermionic top partners with a mass around the TeV scale, with the top partners playing the role of stabilizing the Higgs potential and enforcing partial compositeness for the top quark. A class of models of this kind can be formulated in terms of fermionic strongly coupled gauge theories. A common feature they all share is the presence of specific additional scalar resonances, namely two neutral singlets and a colored octet, described by a simple effective Lagrangian. We study the phenomenology of these scalars, both in a model independent and model dependent way, including the bounds from all the available searches in the relevant channels with di-boson and di-top final states. We develop a generic framework which can be used to constrain any model containing pseudo-scalar singlets or octets. Using it, we find that such signatures provide strong bounds on the compositeness scale complementary to the traditional EWPT and Higgs couplings deviations. In many cases a relatively light scalar can be on the verge of discovery as a first sign of new physics.</p>},
  articleno    = {94},
  author       = {Belyaev, Alexander S. and Cacciapaglia, Giacomo and Cai, Haiying and Ferretti, Gabriele and Flacke, Thomas and Parolini, Alberto and Serodio, Hugo},
  issn         = {1126-6708},
  keyword      = {Beyond Standard Model,Global Symmetries,Sigma Models,Technicolor and Composite Models},
  language     = {eng},
  month        = {01},
  number       = {1},
  publisher    = {Springer},
  series       = {Journal of High Energy Physics},
  title        = {Di-boson signatures as standard candles for partial compositeness},
  url          = {http://dx.doi.org/10.1007/JHEP01(2017)094},
  volume       = {2017},
  year         = {2017},
}