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Di-boson signatures as standard candles for partial compositeness

Di-boson signatures as standard candles for partial compositeness
Di-boson signatures as standard candles for partial compositeness
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.
Beyond Standard Model, Global Symmetries, Sigma Models, Technicolor and Composite Models
Belyaev, Alexander
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Cacciapaglia, Giacomo
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Cai, Haiying
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Ferretti, Gabriele
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Flacke, Thomas
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Parolini, Alberto
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Serodio, Hugo
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Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
Cacciapaglia, Giacomo
380b5956-ae5a-48ca-8079-0b477da50014
Cai, Haiying
746a151b-b40e-461b-89c1-5165e0a8fa01
Ferretti, Gabriele
18986909-e4ad-4374-a810-62a37479c7d3
Flacke, Thomas
15314cdc-3890-4986-afe0-d3da8b6c81f3
Parolini, Alberto
49aba9e0-0c5c-4e70-8269-a024b707aa02
Serodio, Hugo
dd6d0147-9d27-4364-b2cf-72dba6afca5f

Belyaev, Alexander, Cacciapaglia, Giacomo, Cai, Haiying, Ferretti, Gabriele, Flacke, Thomas, Parolini, Alberto and Serodio, Hugo (2017) Di-boson signatures as standard candles for partial compositeness. Journal of High Energy Physics, 01 (1). (doi:10.1007/JHEP01(2017)094).

Record type: Article

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 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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More information

Accepted/In Press date: 1 January 2017
e-pub ahead of print date: 23 January 2017
Published date: 23 January 2017
Keywords: Beyond Standard Model, Global Symmetries, Sigma Models, Technicolor and Composite Models
Organisations: Physics & Astronomy

Identifiers

Local EPrints ID: 406171
URI: https://eprints.soton.ac.uk/id/eprint/406171
PURE UUID: e7b7d3a7-6c09-4dec-a93a-96b8bed07531
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

Catalogue record

Date deposited: 10 Mar 2017 10:41
Last modified: 15 Aug 2019 00:42

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