Exploring extended Higgs sectors via pair production at the LHC

Cacciapaglia, Giacomo; Flacke, Thomas; Kunkel, Manuel; Porod, W.; Schwarze, L.

doi:10.1007/jhep12(2022)087

Cited by 5 publications

(2 citation statements)

References 89 publications

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“…The electrically neutral scalar S 0 decays primarily into t t and b b final states with almost equal BRs at m S ≫ m t , since λ S 0 t,L = λ S 0 b,R and λ S 0 t,R = λ S 0 b,L = 0. This case is different from the results presented in [97,98] where the couplings of neutral pNGB scalar with the SM quarks are assumed to be proportional to the corresponding quark mass. Since the neutral scalar of the triplet we are considering does not acquire a VEV, here we consider more generic couplings, also justified from an EFT perspective shown in appendix A.…”

Section: Branching Ratio Patternscontrasting

confidence: 59%

Heavy vector-like quarks decaying to exotic scalars: a case study with triplets

Banerjee,

Ellajosyula,

Panizzi

2024

J. High Energ. Phys.

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We investigate the pair production of a vector-like quark triplet with hypercharge 5/3 decaying into top quark and a complex scalar triplet with hypercharge 1 at the LHC. This novel scenario, featuring particles with exotic charges — two quarks with charge 8/3 and 5/3 and a scalar with charge 2 — serves as a unique window to models based on the framework of partial compositeness, where these particles naturally emerge as bound states around the TeV scale. Leveraging on the LHC data we establish exclusion limits on the masses of the vector-like quark and the scalar triplet. Subsequently, we design an analysis strategy aimed at improving sensitivity in the region which is still allowed. Our analysis focuses on two specific regions in the parameter space: the first entails a large mass gap between the vector-like quarks and the scalars, so that the vector-like quarks can decay into the scalars; the second involves a small mass gap, such that this decay is forbidden. To simplify the parameter space, both vector-like quarks and scalars are assumed to be degenerate or almost degenerate within the triplets, such that chain decays between fermions and scalars are suppressed. As a result, we found that final states characterized by a same-sign lepton pair, multiple jets, and high net transverse momentum (i.e. effective mass) will play a pivotal role to unveil this model and, more in general, models characterised by multiple vector-like quarks around the same mass scale during the high luminosity LHC phase.

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Section: Branching Ratio Patternscontrasting

confidence: 59%

Heavy vector-like quarks decaying to exotic scalars: a case study with triplets

Banerjee,

Ellajosyula,

Panizzi

2024

J. High Energ. Phys.

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“…The LHC has started and, in future runs, will continue to search for such states, see e.g. [12,13] for recent re-interpretation of existing data in the context of CHM.…”

Section: Introductionmentioning

confidence: 99%

Applying gauge/gravity duality to Composite Higgs models

Porod

2022

EPJ Web Conf.

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The AdS/CFT correspondence and its generalization to gauge/gravity dualities provide a very useful approach into solving strongly coupled systems. We put this at work for the strongly coupled sector of Composite Higgs models. We work out relations between masses of proposed states in Composite Higgs. As a cross check we compare these results to existing lattice calculations for which we find good agreement.

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Coloured spin-1 states in composite Higgs models

Cacciapaglia,

Deandrea,

Kunkel

et al. 2024

J. High Energ. Phys.

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Strong dynamics for composite Higgs models predict spin-1 resonances which are expected to be in the same mass range as the usually considered top-partners. We study here QCD-coloured vector and axial-vector states stemming from composite Higgs dynamics in several relevant models based on an underlying gauge-fermion description. These states can come as triplet, sextet and octet representation. All models considered have a colour octet vector state in common which can be singly produced at hadron colliders as it mixes with the gluon. We explore the rich and testable phenomenology of these coloured spin-1 states at the LHC and future colliders.

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Exploring extended Higgs sectors via pair production at the LHC

Cited by 5 publications

References 89 publications

Heavy vector-like quarks decaying to exotic scalars: a case study with triplets

Heavy vector-like quarks decaying to exotic scalars: a case study with triplets

Applying gauge/gravity duality to Composite Higgs models

Coloured spin-1 states in composite Higgs models

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