Flavor violation in warped extra dimensions and CP asymmetries in B decays

Burdman, Gustavo

doi:10.1016/s0370-2693(04)00511-8

Cited by 43 publications

(64 citation statements)

References 19 publications

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“…(ii) Kaluza-Klein excitations of gluons in RS models [20] couple mainly to the third generation quarks and contribute to all gluonic penguin operators: 2…”

Section: Specific Scenariosmentioning

confidence: 99%

The pattern of CP asymmetries inb→stransitions

Buchalla¹,

Hiller²,

Nir³

et al. 2005

J. High Energy Phys.

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New CP violating physics in b → s transitions will modify the CP asymmetries in B decays into final CP eigenstates (φK S , η ′ K S , π 0 K S , ωK S , ρ 0 K S and ηK S ) from their Standard Model values.In a model independent analysis, the pattern of deviations can be used to probe which Wilson coefficients get a significant contribution from the new physics. We demonstrate this idea using several well-motivated models of new physics, and apply it to current data.

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“…(ii) Kaluza-Klein excitations of gluons in RS models [20] couple mainly to the third generation quarks and contribute to all gluonic penguin operators: 2…”

Section: Specific Scenariosmentioning

confidence: 99%

The pattern of CP asymmetries inb→stransitions

Buchalla¹,

Hiller²,

Nir³

et al. 2005

J. High Energy Phys.

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“…gluinos) thus generating dimensionsix flavor changing neutral current (FCNC) operators. While these flavor violations are suppressed by the so-called RS-GIM mechanism [8][9][10] the KK masses have to be heavier than ∼ 20 TeV to suppress FCNC processes in the RS theory [6,11] while this bound can be lowered to 4-5 TeV in the case of IR deformed metrics [5,6].…”

Section: Jhep02(2013)079mentioning

confidence: 99%

“…10 As for the charged leptons we would like to be able to write different c E i , so there should not be any nonabelian transformation on the charged leptons. A common charged lepton mass term will leave U(3) E unbroken while different masses will break it to ⊗ i U(1) E i ⊂ U(3) E .…”

Section: Jhep02(2013)079mentioning

confidence: 99%

Neutrino mixing from Wilson lines in warped space

Gersdorff

Quirós

Wiechers

2013

J. High Energ. Phys.

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Abstract:We consider the generation of the hierarchical charged lepton spectrum and anarchic neutrino masses and mixing angles in warped extra dimensional models with Randall-Sundrum metric. We have classified all possible cases giving rise to realistic spectra for both Dirac and Majorana neutrinos. An anarchic neutrino spectrum requires a convenient bulk symmetry broken by boundary conditions on both UV and IR branes. We have in particular considered the case of Majorana neutrinos with a continuous bulk symmetry. To avoid unwanted massless extra gauge bosons the 4D group should be empty. If the 4D coset is not vanishing it can provide a Wilson Line description of the neutrino Majorana mass matrix. We have studied an example based on the bulk gauge group U(3) ℓ ⊗ U(3) N ⊗ i U(1) E i with the Wilson Line in SO(3) N satisfying all required conditions. A χ 2 -fit to experimental data exhibits 95% CL region in the parameter space with no finetuning. As a consequence of the symmetries of the theory there is no tree-level induced lepton flavor violation and so one-loop processes are consistent with experimental data for KK-modes about a few TeV. The model is easily generalizable to models with IR deformed metrics with similar conclusions.

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“…(17) and (19). In a flavour theory the different composition of the chiral quarks of the first and second generation can induce dangerous FCNC mediated, for example, by G * and Z * [22]. These effects can be minimized if the degree of compositeness of c R and s R is similar to that of u R and d R , i.e.…”

Section: Fermion Embeddingmentioning

confidence: 99%

A composite Higgs model analysis of forward-backward asymmetries in the production of tops at Tevatron and bottoms at LEP and SLC

Álvarez

Rold

Szynkman

2011

J. High Energ. Phys.

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We perform a joint analysis of the prediction of composite Higgs models for the discrepancies of the forward-backward asymmetries of top and bottom quarks at Tevatron and LEP+SLC, respectively. We build a two sector model which can be thought as an effective low energy description of 5D warped models and choose the quantum numbers of the fermionic resonances to protect the Z-couplings of the partially composite Standard Model light quarks. We analyze the cross section, forward-backward asymmetry and invariant mass distribution of the top anti-top production at Tevatron, as well as the bottom forward-backward asymmetry and the Z-branching fraction into b-quarks at LEP and SLC, for the two sector model. In the region of the parameter space that naturally leads to the Standard Model spectrum and solves the bottom anomaly, the model improves the top forward-backward asymmetry, giving a prediction of up to 10%, and predicts a small decrease of the tt cross section. It also predicts non-universal corrections of the Z-couplings to the light quarks of order 0.001.

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Flavor violation in warped extra dimensions and CP asymmetries in B decays

Cited by 43 publications

References 19 publications

The pattern of CP asymmetries inb→stransitions

The pattern of CP asymmetries inb→stransitions

Neutrino mixing from Wilson lines in warped space

A composite Higgs model analysis of forward-backward asymmetries in the production of tops at Tevatron and bottoms at LEP and SLC

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