Flavor

Panico, Giuliano; Wulzer, Andrea

doi:10.1007/978-3-319-22617-0_4

Cited by 35 publications

(49 citation statements)

References 53 publications

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“…L counts the loop level at which the operator is generated, E φ,V,ψ count the insertions of pions, elementary SM gauge bosons and fermions, d counts the derivatives and χ the mass insertions. Finally, µ ≥ 0 takes into account if some operator is further suppressed due to symmetry arguments [92] while E 4f ≥ 0 counts insertions of G-breaking effective four-fermion operators such as those responsible for the SM Yukawas.…”

Section: Condensate and Pngbsmentioning

confidence: 99%

Addressing the B-physics anomalies in a fundamental Composite Higgs model

Marzocca

2018

J. High Energ. Phys.

126

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I present a model addressing coherently the naturalness problem of the electroweak scale and the observed pattern of deviations from the Standard Model in semi-leptonic decays of B mesons. The Higgs and the two scalar leptoquarks responsible for the B-physics anomalies, S 1 = (3, 1, 1/3) and S 3 = (3, 3, 1/3), arise as pseudo Nambu-Goldstone bosons of a new strongly coupled sector at the multi-TeV scale. I focus on an explicit realization of such a dynamics in terms of a new strongly coupled gauge interaction and extra vectorlike fermions charged under it. The model presents a very rich phenomenology, ranging from flavour observables, Higgs and electroweak precision measurements, and direct searches of new states at the LHC.

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Section: Condensate and Pngbsmentioning

confidence: 99%

Addressing the B-physics anomalies in a fundamental Composite Higgs model

Marzocca

2018

J. High Energ. Phys.

126

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“…To generate a visible NP effect in the b → sµ + µ − transition, there must be sufficiently large flavour violating interactions involving left-handed quarks. But apart 2 Contrary to [24], we will include resonances associated with U (1) X and SU (3)c in the following. 3 In models where the Higgs boson is implemented as a pseudo Nambu-Goldstone boson these mixing terms correspond to an expansion in the Higgs non-linearities.…”

Section: A Quark Flavour Physicsmentioning

confidence: 99%

Violation of lepton flavour universality in composite Higgs models

2015

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We investigate whether the $2.6\sigma$ deviation from lepton flavour universality in $B^+\to K^+\ell^+\ell^-$ decays recently observed at the LHCb experiment can be explained in minimal composite Higgs models. We show that a visible departure from universality is indeed possible if left-handed muons have a sizable degree of compositeness. Constraints from $Z$-pole observables are avoided by a custodial protection of the muon coupling. The deficit in the invisible $Z$ width at LEP is explained in the same region of parameters.Comment: 5 pages, 2 figures. v4: discussion of invisible Z width adde

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“…In this work we will cover, in a two-site model approximation [22][23][24], all the possible couplings emerging from the interplay among the top partners sector and the composite operators sourced by the strong regime. The SO(5) invariance will fix the interactions of the following Lagrangian…”

Section: Assumptions and Set-upmentioning

confidence: 99%

“…The aim of this work is to explore the low energy implications from the interplay among three matter sectors: elementary states, composite fermionic partners and spin-1 resonances in a SO(5) CHM, within the two-site model approximation [22][23][24]. We will consider the interactions of the vector resonances ρ, here assumed to be triplets of SU (2) L × SU (2) R , with a set of SO(5)-invariant fermionic currents.…”

Section: Introductionmentioning

confidence: 99%

Modelling top partner-vector resonance phenomenology

Yepes

Zerwekh

2019

Nuclear Physics B

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We have analysed the observable consequences of the interactions of spin-1 resonances coupled to the invariant fermionic currents that arise in an SO(5) Composite Higgs set-up. The phenomenology entailed by such interactions is thoroughly analysed by studying heavy vector resonances production and decay modes in the viable resonance mass range. Additionally, the production of double and single-composite fermion final states has been scanned along the fermion mass scale. Such production is mediated by the SM gauge and Higgs interactions, and also by charged and neutral vector resonances. The coupling between the new fermions and vector resonances induces a sizeable effect in the production rates. We use the recent 13 TeV LHC searches for vector-like quarks to constrain our parameter space. Specifically, we explore the allowed regions by analysing the decays of a heavy vector-like quark in the W bchannel. We conclude that generically the impact of the couplings between the spin-1 and spin-1/2 resonances will substantially reduce the permitted regions, leading us to test the sensitivity of the parametric dependence in the light of exotic matter interactions.

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Flavor

Cited by 35 publications

References 53 publications

Addressing the B-physics anomalies in a fundamental Composite Higgs model

Addressing the B-physics anomalies in a fundamental Composite Higgs model

Violation of lepton flavour universality in composite Higgs models

Modelling top partner-vector resonance phenomenology

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