Higgs-mediated muon–electron conversion process in supersymmetric see-saw model

Kitano, Ryuichiro; Koike, Masafumi; Komine, Shinji; Okada, Yasuhiro

doi:10.1016/j.physletb.2003.09.067

Cited by 57 publications

(66 citation statements)

References 55 publications

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“…On the contrary, N ! eN is not suppressed by the light constituent quark m u and m d but only by the nucleon masses, because the Higgs-boson coupling to the nucleon is shown to be characterized by the nucleon mass using the conformal anomaly relation [797]. In particular, the most important contribution turns out to come from the exchange of the scalar Higgs boson H which couples to the strange quark [797].…”

Section: N ! Enmentioning

confidence: 98%

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Flavor physics of leptons and dipole moments

Raidal¹,

Schaaf²,

Bigi³

et al. 2009

Flavor in the Era of the LHC

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This chapter of the report of the "Flavour in the era of the LHC" Workshop discusses the theoretical, phenomenological and experimental issues related to flavour phenomena in the charged lepton sector and in flavour-conserving CP-violating processes. We review the current experimental limits and the main theoretical models for the flavour structure of fundamental particles. We analyze the phenomenological consequences of the available data, setting constraints on explicit models beyond the Standard Model, presenting benchmarks for the discovery potential of forthcoming measurements both at the LHC and at low energy, and exploring options for possible future experiments.

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Section: N ! Enmentioning

confidence: 98%

“…e conversion in Nuclei process can be generated by a scalar operator through the tree level Higgs exchange [797]. Moreover, at one loop level, additional contributions induced by l i !…”

Section: N ! Enmentioning

confidence: 99%

Flavor physics of leptons and dipole moments

Raidal¹,

Schaaf²,

Bigi³

et al. 2009

Flavor in the Era of the LHC

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show abstract

“…The dominant contribution to Higgs-mediated µN → eN comes from a tree-level Higgs boson exchange [8]. The reason is that coupling between the Higgs boson and nucleon is characterized by the nucleon mass m N through the conformal anomaly relation [23], and could evade suppression of the light constituent quark mass.…”

Section: µ-E Conversion In Nucleimentioning

confidence: 99%

“…On the other hand, since the Higgsmediated effects are not suppressed by M SUSY [6], these contributions to the processes could be sizable when M SUSY is much greater than the TeV scale. The branching ratio of µ-e conversion in nuclei is more sensitive to the Higgs-mediated contribution [7,8]. Indeed, the ratio of the branching ratio for µ → eγ and µ-e conversion in nuclei is a good observable to constrain mass spectrum in the MSSM, since it is sensitive to whether the gaugino-mediated or Higgs-mediated contribution is dominant.…”

Section: Introductionmentioning

confidence: 99%

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Mass spectrum dependence of the Higgs-mediatedμ−etransition in the MSSM

Yang

2011

Phys. Rev. D

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In this paper, we study non-decoupling µ -e transition effects by Higgs-mediated contribution in the MSSM, when some SUSY mass parameters are much greater than the TeV scale. In order to treat CP-odd Higgs mass m A 0 as a free parameter, we consider the non-universal Higgs mass model (NUHM), and assume the only left-or right-handed sleptons had flavor-mixing mass terms. As a result, when only right-handed sleptons have flavor-violation, there is some Higgs-dominant region although SUSY particle masses are around the TeV scale. We found it is necessary to consider the Higgs effect in the region where the gaugino effect receives destructive interference. Moreover, the ratio of branching ratios BR(µ → eγ)/BR(µAl → eAl) drastically depends on the mass spectrum structure and chirality of flavor violation. The log factor from two split mass scales influences the way of interference between gaugino-and Higgs-mediated contributions significantly.

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Low-energy lepton physics in the MRSSM: (g − 2)μ, μ→eγ and μ→e conversion

Stöckinger

Stöckinger-Kim

2019

J. High Energ. Phys.

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Low-energy lepton observables are discussed in the Minimal R-symmetric Supersymmetric Standard Model. We present comprehensive numerical analyses and the analytic one-loop results for (g − 2) µ , µ → eγ, and µ → e conversion. The interplay between the three observables is investigated as well as the parameter regions with large g − 2. A striking difference to the MSSM is the absence of tan β enhancements; however we find smaller enhancements governed by MRSSM-specific R-Higgsino couplings λ d and Λ d. As a result we find significant contributions to g − 2 only in a small parameter space with several SUSY masses below 200 GeV, compressed spectra and large λ d , Λ d. In this parameter space there is a correlation between all three considered observables. In the parameter region with small (g − 2) µ the SUSY masses can be larger and the correlation between µ → eγ and µ → e conversion is weak. Therefore already COMET Phase 1 has a promising sensitivity to the MRSSM.

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Higgs-mediated muon–electron conversion process in supersymmetric see-saw model

Cited by 57 publications

References 55 publications

Flavor physics of leptons and dipole moments

Flavor physics of leptons and dipole moments

Mass spectrum dependence of the Higgs-mediatedμ−etransition in the MSSM

Low-energy lepton physics in the MRSSM: (g − 2)μ, μ→eγ and μ→e conversion

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