Supersymmetry and FCNC Effects

Misiak, Mikołaj; Pokorski, Stefan; Rosiek, Janusz

doi:10.1142/9789812812667_0012

Cited by 181 publications

(217 citation statements)

References 33 publications

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“…We focus here on the H x → l klm channel, but due to the fact that we work with real parameters, the predictions for the CP -conjugate channel H x → l mlk will be equal. The present computation of Γ(H x → l klm ) is performed by taking into account the following assumptions and considerations: 1) The amplitude is evaluated at the one-loop level, 2) only loops containing sleptons and sneutrinos contribute since they are the only particles propagating the LFV by means of the ∆ AB mk entries with m = k, 3) the particle content assumed here is that of the MSSM, 4) the external particles h, H, A and l k ,l m are expressed in the physical mass basis, 5) the internal loop sparticles are expressed in the electroweak interaction basis, and 6) we use the Mass Insertion Approximation [49][50][51] to describe the propagation of slepton mixing changing flavor, and work in the linear approximation for each insertion ∆ AB mk , with AB = LL, RR, LR, RL, and m = k, i.e, considering one single insertion at a time.…”

Section: Analytic Results Of the Lfvhd Widths In The Miamentioning

confidence: 99%

“…These mixings are parametrized by means of a complete set of slepton flavor mixing dimensionless parameters, δ AB mk with AB = LL, RR, LR, RL, and flavor indices m, k = 1, 2, 3, with m = k. These parameters take into account, in a model-independent way and without any assumption on their particular origin, all the possible flavor mixings among the SUSY partners of the leptons with either left-handed or right-handed chirality. The novelty of this new computation is that we use a different technique, the so-called Mass Insertion Approximation (MIA) [49][50][51], that works with sleptons in the electroweak basis instead…”

Section: Jhep03(2016)055mentioning

confidence: 99%

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Analysis of the h, H, A → τμ decays induced from SUSY loops within the Mass Insertion Approximation

Arganda

Herrero

Morales

et al. 2016

J. High Energ. Phys.

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In this paper we study the lepton favor violating decay channels of the neutral Higgs bosons of the Minimal Supersymmetric Standard Model into a lepton and an antilepton of different flavor. We work in the context of the most general flavor mixing scenario in the slepton sector, in contrast to the minimal flavor violation assumption more frequently used. Our analytic computation is a one-loop diagrammatic one, but in contrast to the full one-loop computation which is usually referred to the physical slepton mass basis, we use here instead the Mass Insertion Approximation (MIA) which uses the electroweak interaction slepton basis and treats perturbatively the mass insertions changing slepton flavor. By performing an expansion in powers of the external momenta in the relevant form factors, we will be able to separate explicitly in the analytic results the leading non-decoupling (constant at asymptotically large sparticle masses) and the next to leading decoupling contributions (decreasing with the sparticle masses). Our final aim is to provide a set of simple analytic formulas for the form factors and the associated effective vertices, that we think may be very useful for future phenomenological studies of the lepton flavor violating Higgs boson decays, and for their comparison with data. The accuracy of the numerical results obtained with the MIA are also analyzed and discussed here in comparison with the full one-loop results. Our most optimistic numerical estimates for the three neutral Higgs boson decays channels into τ and µ leptons, searching for their maximum rates that are allowed by present constraints from τ → µγ data and beyond Standard Model Higgs boson searches at the LHC, are also included.

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Section: Analytic Results Of the Lfvhd Widths In The Miamentioning

confidence: 99%

Section: Jhep03(2016)055mentioning

confidence: 99%

Analysis of the h, H, A → τμ decays induced from SUSY loops within the Mass Insertion Approximation

Arganda

Herrero

Morales

et al. 2016

J. High Energ. Phys.

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show abstract

“…Specific assumptions on the flavor structure of NP correspond to special choices of the F i functions. For example Minimal Flavor Violation (MFV) models [20]- [25] correspond to F 1 = F SM and F i =1 = 0. Following ref.…”

Section: Jhep03(2013)089mentioning

confidence: 99%

Kaon mixing beyond the SM from Nf = 2 tmQCD and model independent constraints from the UTA

Bertone

Carrasco

Ciuchini

et al. 2013

J. High Energ. Phys.

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We present the first unquenched, continuum limit, lattice QCD results for the matrix elements of the operators describing neutral kaon oscillations in extensions of the Standard Model. Owing to the accuracy of our calculation on ∆S = 2 weak Hamiltonian matrix elements, we are able to provide a refined Unitarity Triangle analysis improving the bounds coming from model independent constraints on New Physics. In our nonperturbative computation we use a combination of N f = 2 maximally twisted sea quarks and Osterwalder-Seiler valence quarks in order to achieve both O(a)-improvement and continuum-like renormalization properties for the relevant four-fermion operators. The calculation of the renormalization constants has been performed non-perturbatively in the RI-MOM scheme. Based on simulations at four values of the lattice spacing and a number of quark masses we have extrapolated/interpolated our results to the continuum limit and physical light/strange quark masses.

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“…We give all the expressions already in the super-KM basis (see e.g. [11] for a more detailed discussion).…”

Section: Su(2)-doublets)mentioning

confidence: 99%

“…Using the notation of this Appendix, one can list (in the mass eigenstate basis) the Feynman rules necessary to calculate cross sections (3), (11) and ( 2) Interactions of charginos and neutralinos with gauge bosons:…”

Section: Su(2)-doublets)mentioning

confidence: 99%

Chargino searches at LEP for complex MSSM parameters

et al. 2002

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We reanalyze the results of the chargino searches at LEP (on the basis of the DELPHI 189 GeV data sample), including the possibility of complex MSSM parameters. We point out the possible differences between the complex-and realparameter analysis. We check that the regions excluded by "standard" analyses remain generally robust against the introduction of complex parameters, with the exception of light sneutrino and low tan β scenario, where additional constraints like those given by the Z 0 width or electric dipole moment measurements are necessary.

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Supersymmetry and FCNC Effects

Cited by 181 publications

References 33 publications

Analysis of the h, H, A → τμ decays induced from SUSY loops within the Mass Insertion Approximation

Analysis of the h, H, A → τμ decays induced from SUSY loops within the Mass Insertion Approximation

Kaon mixing beyond the SM from Nf = 2 tmQCD and model independent constraints from the UTA

Chargino searches at LEP for complex MSSM parameters

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