Soft SUSY breaking grand unification: Leptons vs quarks on the flavor playground

Ciuchini, M.; Masiero, A.; Paradisi, Paride; Silvestrini, L.; Vempati, Sudhir K.; Vives, O.

doi:10.1016/j.nuclphysb.2007.05.032

Cited by 120 publications

(159 citation statements)

References 68 publications

(68 reference statements)

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151

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“…On top of that, if the Mu3e experiment reaches the expected precision finding no sign of the µ → eee process, the parameter space of the model will turn out to be significantly constrained. These results are in good agreement with those obtained with the mass insertion approximation (MIA) [14,15,16,17,18], which provides a simplified description of the phenomenology. As Table 2: Transformation of the matter and flavon superfields under the flavor symmetry G f = A 4 × Z 4 , for non trivial cases the correspondent daggered fields are also specified.…”

Section: A ∆(27) Modelsupporting

confidence: 85%

“…This is because, in this model, the dominant effect comes from the LL mass insertion and, therefore, the two tan β -enhanced terms have the same sign. A detailed discussion of these effects can be found in [18]. We see that present and future LFV constraints are able to explore large values of m 0 and M 1/2 in these models, well beyond the LHC reach.…”

Section: An a 4 Modelmentioning

confidence: 85%

“…discussed in [18,19,20], in the absence of off-diagonal δ LL insertions, the main effects come from the RR sector. This sector suffers from a characteristic cancellation among the two tan β -enhanced dominant contributions: the one due to the pure bino term (with internal chirality flip and a flavorconserving δ LR mass insertion) and another from the bino-higgsino exchange.…”

Section: A ∆(27) Modelmentioning

confidence: 99%

See 2 more Smart Citations

Flavour in SUSY after LHC

Vives¹,

López-Ibáñez²,

Melis³

et al. 2018

Proceedings of Corfu Summer Institute 2017 "Schools and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2017)

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Supersymmetric theories supplemented by an underlying flavor-symmetry G f provide a rich playground for model building aimed at explaining the flavor structure of the Standard Model. In the case where supersymmetry breaking is mediated by gravity, the soft-breaking Lagrangian typically exhibits large tree-level flavor violating effects, even if it stems from an ultraviolet flavorconserving origin. Building on previous work, we continue our phenomenological analysis of these models with a particular emphasis on leptonic flavor observables. We consider two representative models which aim to explain the flavor structure of the lepton sector, with symmetry groups G f = ∆(27) and A 4 ,

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Section: A ∆(27) Modelsupporting

confidence: 85%

Section: An a 4 Modelmentioning

confidence: 85%

Section: A ∆(27) Modelmentioning

confidence: 99%

See 1 more Smart Citation

Flavour in SUSY after LHC

Vives¹,

López-Ibáñez²,

Melis³

et al. 2018

Proceedings of Corfu Summer Institute 2017 "Schools and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2017)

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“…Note that we explicitly kept terms of order ǫ 1 . For the individual equations (23), (29) and (30) even the ǫ 2 contributions of these coefficients would be required. In the matching equation (32), they drop out, however.…”

Section: Appendixmentioning

confidence: 99%

“…In both cases the bounds are much stronger than the ones derived from other measurements. Constraints within various supersymmetric extensions are analyzed in [20][21][22][23][24][25][26][27][28][29][30][31] (for overviews see [3,35]). Bounds on the Little Higgs Model with T-parity have also been presented [36].…”

mentioning

confidence: 99%

Complete next-to-leading order gluino contributions to and

Greub¹,

Hurth²,

Pilipp³

et al. 2011

Nuclear Physics B

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We present the first complete order α s corrections to the Wilson coefficients (at the high scale) of the various versions of magnetic and chromomagnetic operators which are induced by a squark-gluino exchange. For this matching calculation, we work out the onshell amplitudes b → sγ and b → sg, both in the full and in the effective theory up to order α 2 s . The most difficult part of the calculation is the evaluation of the two-loop diagrams in the full theory; these can be split into two classes: a) diagrams with one gluino and a virtual gluon; b) diagrams with two gluinos or with one gluino and a four-squark vertex. Accordingly, the Wilson coefficients can be split into a part a) and a part b). While part b) of the Wilson coefficients is presented in this paper for the first time, part a) was given in [1]. We checked their results for the coefficients of the magnetic operators and found perfect agreement. Moreover, we work out the renormalization procedure in great detail.Our results for the complete next-to-leading order Wilson coefficients are fully analytic, but far too long to be printed. We therefore publish them in the form of a C++ program. They constitute a crucial building block for the phenomenological next-to-leading logarithmic analysis of the branching ratioB → X s γ in a supersymmetric model beyond minimal flavor violation.

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Super flavorsymmetry with multiple Higgs doublets

Kubo

2012

Fortschritte der Physik

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The meaning of non-abelian super flavorsymmetry in the presence of Multiple Higgs Doublets is twofold: The first one is to order the Yukawa sector of the standard model, while generating the Cheng-Sher suppression of tree-level Flavor Changing Neutral Currents (FCNCs), and the second one is to soften the fine tuning problem in the scalar potential and at the same time to suppress FCNCs coming from the soft breaking of supersymmetry. If spontaneous CP violation is combined with non-abelian super flavorsymmetry the CP phases in the soft supersymmetry breaking sector can disappear. This feature of super flavorsymmetry is reviewed and elaborated in a supersymmetric model of flavor based on the finite group Q 6 . The predictions of the model in ferimion mass and mixing, and flavor and CP violation can be tested in future experiments.

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Soft SUSY breaking grand unification: Leptons vs quarks on the flavor playground

Cited by 120 publications

References 68 publications

Flavour in SUSY after LHC

Flavour in SUSY after LHC

Complete next-to-leading order gluino contributions to and

Super flavorsymmetry with multiple Higgs doublets

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