Ultravisible warped model from flavor triviality and improved naturalness

Delaunay, Cédric; Gedalia, Oram; Lee, Seung Joon; Pérez, Gilad; Pontón, Eduardo

doi:10.1103/physrevd.83.115003

Cited by 58 publications

(74 citation statements)

References 178 publications

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“…The mass matrix of the up-type sector in eq. (2.10) now reads 31) while the mass matrix in the down-type sector is the same as in eq. (2.11).…”

Section: Jhep02(2014)055mentioning

confidence: 97%

“…Sizable dijet contributions arise in the presence of a light color octet vector resonance in the effective theory [31,32,35,37]. Even if such a state is absent, as assumed here, new physics dijet sources are generically induced by unknown physics at the cut-off scale Λ ∼ 4πf .…”

Section: Indirect Constraints From Dijet Productionmentioning

confidence: 99%

“…This possibility leads to a series of interesting experimental consequences which have been partially discussed in ref. [31,32,[34][35][36][37]. We focus here on analysing signals which could be already probed by direct searches at the LHC.…”

Section: Jhep02(2014)055mentioning

confidence: 99%

“…Furthermore, it was shown in refs. [31,32] that while the degree of compositeness of the SM quark doublets is severely constrained by EW precision tests, bounds on the degree of compositeness of the SM quark singlets can be rather weak thanks to an approximate custodial parity [33].…”

Section: Jhep02(2014)055mentioning

confidence: 99%

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Light non-degenerate composite partners at the LHC

Delaunay

Flacke

González-Fraile

et al. 2014

J. High Energ. Phys.

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Abstract:We study the phenomenological implications of a large degree of compositeness for the light generation quarks in composite pseudo-Nambu-Goldstone-boson Higgs models. We focus in particular on phenomenologically viable scenarios where the right-handed uptype quarks have a sizable mixing with the strong dynamics. For concreteness we assume the latter to be characterized by an SO(5)/SO(4) symmetry with fermionic resonances in the SO(4) singlet and fourplet representations. Singlet partners dominantly decay to a Higgs boson and jets. Since no dedicated searches are currently looking for these final states, singlet partners can still be rather light. Conversely, some fourplet partner components dominantly decay to an electroweak gauge boson and a jet, a type of signature which has been analysed at the LHC. We have reinterpreted various ATLAS and CMS analyses in order to constrain the parameter space of this class of models. In the limit of first two generation degeneracy, as in minimal flavor violation or U(2)-symmetric flavor models, fourplet partners need to be relatively heavy, with masses above 1.8 TeV, or the level of compositeness needs to be rather small. The situation is significantly different in models which deviate from the first two generation degeneracy paradigm, as charm quark parton distribution functions are suppressed relative to the up quark ones. We find that JHEP02 (2014)055 the right-handed charm quark component can be mostly composite together with their partners being as light as 600 GeV, while the right-handed up quark needs either to be mostly elementary or to have partners as heavy as 2 TeV. Models where right-handed uptype quarks are fully composite fermions are also analysed and yield qualitatively similar conclusions. Finally, we consider the case where both the fourplet and the singlet states are present. We demonstrate that in this case the fourplet bounds could be significantly weaken due to a combination of smaller production rates and the opening of new channels including cascade processes.

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“…The mass matrix of the up-type sector in eq. (2.10) now reads 31) while the mass matrix in the down-type sector is the same as in eq. (2.11).…”

Section: Jhep02(2014)055mentioning

confidence: 97%

Section: Indirect Constraints From Dijet Productionmentioning

confidence: 99%

Section: Jhep02(2014)055mentioning

confidence: 99%

Section: Jhep02(2014)055mentioning

confidence: 99%

See 2 more Smart Citations

Light non-degenerate composite partners at the LHC

Delaunay

Flacke

González-Fraile

et al. 2014

J. High Energ. Phys.

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“…(III) Minimal flavor violation (MFV): The microscopic flavor parameters are hierarchical and realize the 4D MFV selection rules [37][38][39][40][41][42]. The SM flavor puzzle remains unsolved but the theory entertains a strong mechanism to suppress new sources of flavor breaking [43][44][45][46].…”

Section: Jhep02(2013)149mentioning

confidence: 99%

Up asymmetries from exhilarated composite flavor structures

Rold

Delaunay

Grojean

et al. 2013

J. High Energ. Phys.

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We present a class of warped extra dimension (composite Higgs) models which conjointly accommodates the tt forward-backward asymmetry observed at the Tevatron and the direct CP asymmetry in singly Cabibbo suppressed D decays first reported by the LHCb collaboration. We argue that both asymmetries, if arising dominantly from new physics beyond the Standard Model, hint for a flavor paradigm within partial compositeness models in which the right-handed quarks of the first two generations are not elementary fields but rather composite objects. We show that this class of models is consistent with current data on flavor and CP violating physics, electroweak precision observables, dijet and top pair resonance searches at hadron colliders. These models have several predictions which will be tested in forthcoming experiments. The CP asymmetry in D decays is induced through an effective operator of the form (ūc) V +A (ss) V +A at the charm scale, which implies a larger CP asymmetry in the D 0 → K + K − rate relative the D 0 → π + π − channel. This prediction is distinctive from other Standard Model or dipole-based new physics interpretation of the LHCb result. CP violation in D−D mixing as well as an an excess of dijet production of the LHC are also predicted to be observed in a near future. A large top asymmetry originates from the exchange of an axial resonance which dominantly produces left-handed top pairs. As a result a negative contribution to the lepton-based forward-backward asymmetry in tt production, as well as O(10%) forward-backward asymmetry in bb production above m bb ≃ 600 GeV at the Tevatron is expected.

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