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Di-boson signatures as standard candles for partial compositeness

Alexander Belyaev ; Giacomo Cacciapaglia ; Haiying Cai ; Gabriele Ferretti (Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)) ; Thomas Flacke ; Alberto Parolini ; Hugo Serodio
Journal of High Energy Physics (1029-8479). Vol. 2017 (2017), 1,
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Beyond Standard Model, Global Symmetries, Sigma Models, Technicolor and Composite Models



Denna post skapades 2017-03-03. Senast ändrad 2017-03-22.
CPL Pubid: 248362

 

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Institutioner (Chalmers)

Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)

Ämnesområden

Subatomär fysik

Chalmers infrastruktur