Solution to the Flavor Problem of Warped Extra-Dimension Models

Bauer, Martin; Malm, Raoul; Neubert, Matthias

doi:10.1103/physrevlett.108.081603

Cited by 29 publications

(46 citation statements)

References 34 publications

(41 reference statements)

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“…4 Such a "custodial-like" color bulk symmetry was already considered in ref. [31] as a attempt to solve the CP problem of anarchic RS models. We analyse in appendix C the CPV contributions to both K −K mixing and radiative K decays arising in SU(3) L ×SU(3) R models with flavor anarchy and show that only a minor improvement relative to original anarchic RS models can be obtained (yet at the prize of a significantly worse Higgs mass fine-tuning, as shown in appendix D), so that a CP problem still remains.…”

Section: Jhep02(2013)149mentioning

confidence: 99%

“…The above extended color symmetry was already put forward by the authors of ref. [31] as a solution to the in ǫ K problem in flavor anarchic scenarios. We analyze in details the contributions to ǫ K as well as ǫ ′ /ǫ K in anarchic scenarios based on the coset SU(3) L ×SU(3) R /SU(3) V .…”

Section: Kaon Physics In Anarchic Su(3) L ×Su(3) R Modelsmentioning

confidence: 99%

“…ǫ K is dominated by the Wilson coefficient C 4 K , which is chirally enhanced and is estimated to be [27,28,31] 11…”

Section: Kaon Physics In Anarchic Su(3) L ×Su(3) R Modelsmentioning

confidence: 99%

“…The C 4 K contribution is suppressed relative the case with no extended color symmetry (obtained in the limit m A → ∞) provided the axial KK-gluon is degenerate with the vector KK-gluon, δm 2 ≪ m 2 V [31]. We argued in appendix B.2 that this splitting is constrained to be sizable by the large top mass, with δm 2 /m 2 V O(0.1), thus limiting already the suppression in C K 4 .…”

Section: Kaon Physics In Anarchic Su(3) L ×Su(3) R Modelsmentioning

confidence: 99%

“…Another mechanism based on extending the color gauge symmetry in the bulk to SU(3) L ×SU(3) R was also proposed in ref. [31] to suppress flavor changing contributions in the down sector. 2 (II) Alignment: Similarly to the original proposal in supersymmetric models [32], the microscopic flavor parameters are anarchic, so the SM flavor puzzle is solved in a generic way, but the 5D additional…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Jhep02(2013)149mentioning

confidence: 99%

Section: Kaon Physics In Anarchic Su(3) L ×Su(3) R Modelsmentioning

confidence: 99%

“…ǫ K is dominated by the Wilson coefficient C 4 K , which is chirally enhanced and is estimated to be [27,28,31] 11…”

Section: Kaon Physics In Anarchic Su(3) L ×Su(3) R Modelsmentioning

confidence: 99%

Section: Kaon Physics In Anarchic Su(3) L ×Su(3) R Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Up asymmetries from exhilarated composite flavor structures

Rold

Delaunay

Grojean

et al. 2013

J. High Energ. Phys.

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A Lesson from RττK()$R_{\tau \tau }^{K^{(\ast )}}$ and RννK()$R_{\nu \nu }^{K^{(\ast )}}$ at Belle II

de Giorgi,

Piazza

2023

Fortschritte der Physik

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Within the assumption of Left‐Handed (LH) New Physics (NP), the relations between and for several Beyond the Standard Model (BSM) scenarios are reviewed, commonly considered to explain the Lepton flavor Universality (LFU) violation observed in charged and neutral‐current semileptonic B decays. The latest world averages that include the recent LHCb measurement and assess the possibility of simultaneously explaining B‐anomalies without spoiling current bounds on di‐neutrino and di‐tau modes are employed. This is particularly relevant in light of the upcoming results by Belle II on neutrinos and the continuing improvement in accuracy and sensitivity achieved in tau modes.

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Flavor phenomenology in general 5D warped spaces

Cabrer

Gersdorff

Quirós

2012

J. High Energ. Phys.

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Abstract:We have considered a general 5D warped model with SM fields propagating in the bulk and computed explicit expressions for oblique and non-oblique electroweak observables as well as for flavor and CP violating effective four-fermion operators. We have compared the resulting lower bounds on the Kaluza Klein (KK) scale in the RS model and a recently proposed model with a metric modified towards the IR brane, which is consistent with oblique parameters without the need for a custodial symmetry. We have randomly generated 40,000 sets of O(1) 5D Yukawa couplings and made a fit of the quark masses and CKM matrix elements in both models. This method allows to identify the percentage of points consistent with a given KK mass, which in turn provides us with a measure for the required fine-tuning. Comparison with current experimental data on R b , FCNC and CP violating operators exhibits an improved behavior of our model with respect to the RS model. In particular, allowing 10% fine-tuning the combined results point towards upper bounds on the KK gauge boson masses around 3.3 TeV in our model as compared with 13 TeV in the RS model. One reason for this improvement is that fermions in our model are shifted, with respect to fermions in the RS model, towards the UV brane thus decreasing the strength of the modifications of electroweak observables.

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Solution to the Flavor Problem of Warped Extra-Dimension Models

Cited by 29 publications

References 34 publications

Up asymmetries from exhilarated composite flavor structures

Up asymmetries from exhilarated composite flavor structures

A Lesson from RττK()$R_{\tau \tau }^{K^{(\ast )}}$ and RννK()$R_{\nu \nu }^{K^{(\ast )}}$ at Belle II

Flavor phenomenology in general 5D warped spaces

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Solution to the Flavor Problem of Warped Extra-Dimension Models

Cited by 29 publications

References 34 publications

Up asymmetries from exhilarated composite flavor structures

Up asymmetries from exhilarated composite flavor structures

A Lesson from RττK(*)$R_{\tau \tau }^{K^{(\ast )}}$ and RννK(*)$R_{\nu \nu }^{K^{(\ast )}}$ at Belle II

Flavor phenomenology in general 5D warped spaces

Contact Info

Product

Resources

About

A Lesson from RττK()$R_{\tau \tau }^{K^{(\ast )}}$ and RννK()$R_{\nu \nu }^{K^{(\ast )}}$ at Belle II