Decoupling of heavy sneutrinos in low-scale seesaw models

Krauss, Manuel E.; Porod, W.; Staub, Florian; Abada, Asmâa; Vicente, Avelino; Weiland, C.

doi:10.1103/physrevd.90.013008

Cited by 16 publications

(11 citation statements)

References 82 publications

(143 reference statements)

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“…(5) and (3) is the constant The result of Ref. [4] has been confirmed by the authors of Refs. [2,3] in Ref.…”

Section: + Frprv Izrsupporting

confidence: 79%

Erratum: Enhancingli→3ljwith theZ
Hirsch¹,
Staub²,
Vicente³
2015
Phys. Rev. D
Self Cite
13
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17
0
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The enhancement of lepton flavor violation rates due to Z-penguins observed in Ref.[1] was a consequence of an error in the literature. Correcting this error, the effect is gone.We found in Ref.[1] that Z-penguins can cause very large contributions to the lepton flavor violating 3-body decays €i -* 3€j in many extensions of the Minimal Supersymmetric Standard Model (MSSM). The effect was induced by the presence of large flavor violating superpotential terms, like in the case of the supersymmetric (SUSY) version of the inverse seesaw. In particular, it came from chargino contributions to the form factor FL, defined asOur calculation of FL in the context of the SUSY inverse seesaw was based on the analytical results obtained in Refs. [2,3] for the MSSM. Using these references, one finds that the chargino contributions to FL are given bywhere CfAX, ER BA'L{c), Q \Y, and Z { [ ] are involved couplings and C0, B u and C24 are loop functions. The crucial loop function is C24, which can be found to be 4C24(mg, m], ml) = B0{m\, mj) + mlC0(m l, m\ , m\) (3) when combining the definitions in Refs. [2,3], However, it was recently found in Ref. [4] that C24 is related to C00, defined by DCooiml, m], m\) = B0(m\, m\) + m §C0(m^, m \, m \),where D = 4 -2e in dimensional regularization, via C24 = C00~g-The difference between Eqs. (5) and (3) is the constant The result of Ref.[4] has been confirmed by the authors of Refs. [2,3] in Ref. [5]. While the impact of this constant is negligible in high-scale seesaw models, it changes the conclusion for low-scale seesaw models: the leading order term to F^ 1 which caused the enhancement between Z-and /-penguins cancels exactly. Thus, the Z-penguins usually do not dominate over the photonic penguins. The consequence of this correction in the inverse seesaw was discussed in detail in Ref. [6]. It was found that, in low-scale seesaw models, the constraints from lepton flavor violating 3-body decays can still be stronger than those from radiative decays. However, the relative enhancement does not come from SUSY Z-penguins with charginos in the loop, but from non-SUSY box diagrams with light right-handed neutrinos. This agrees with the results independently found in Ref. [7]. Furthermore, the same outcome applies to lepton flavor violation in R-parity violating models: the Z-penguin contributions to -> 3*? • are usually smaller than the photon penguins and the constraints from Br(Z, -> €ff) are more severe than those from Br(tf,--*■ 3t?j).1550-7998/2015/91(5)/059902 (2) 059902-1

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“…(5) and (3) is the constant The result of Ref. [4] has been confirmed by the authors of Refs. [2,3] in Ref.…”

Section: + Frprv Izrsupporting

confidence: 79%

Erratum: Enhancingli→3ljwith theZ
Hirsch¹,
Staub²,
Vicente³
2015
Phys. Rev. D
Self Cite
13
0
17
0
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show abstract

“…The supersymmetric contributions to boxes, Higgs penguins, photon penguins were found to perfectly agree with [78,103], while the supersymmetric Z-penguins only differ from [78] via a constant term as pointed out in [77]. This constant term does not impact the result of [78] where a high-scale seesaw mechanism is considered but it can lead to non-physical results in low-scale seesaw models.…”

Section: Jhep11(2014)048mentioning

confidence: 54%

“…Later, this result was (qualitatively) confirmed in [70] and further exploited in several phenomenological studies [73][74][75][76]. However, in [77] it was shown that the results in [72] (and the subsequent studies [73][74][75][76]) are incorrect, due to an inconsistency in [78]. While -3 -…”

Section: Introductionmentioning

confidence: 74%

Lepton flavor violation in low-scale seesaw models: SUSY and non-SUSY contributions

Abada

Krauss

Porod

et al. 2014

J. High Energ. Phys.

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113

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Taking the supersymmetric inverse seesaw mechanism as the explanation for neutrino oscillation data, we investigate charged lepton flavor violation in radiative and 3-body lepton decays as well as in neutrinoless µ − e conversion in muonic atoms. In contrast to former studies, we take into account all possible contributions: supersymmetric as well as non-supersymmetric. We take CMSSM-like boundary conditions for the soft supersymmetry breaking parameters. We find several regions where cancellations between various contributions exist, reducing the lepton flavor violating rates by an order of magnitude compared to the case where only the dominant contribution is taken into account. This is in particular important for the correct interpretation of existing data as well as for estimating the reach of near future experiments where the sensitivity will be improved by one to two orders of magnitude. Moreover, we demonstrate that ratios like BR(τ → 3µ)/BR(τ → µe + e − ) can be used to determine whether the supersymmetric contributions dominate over the W ± and H ± contributions or vice versa.

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“…[36]. We also note that the γ-and Z-penguin diagrams (including the supersymmetric counterparts) give vanishing contributions [36,[38][39][40][41][42]. The last term which is the new contribution in our analysis was not included in Ref.…”

Section: R-parity Violating Interactionsmentioning

confidence: 99%

Scrutinizing R -parity violating interactions in light of RK(*) data

et al. 2017

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The LHCb has measured the ratios of B → K * µ + µ − to B → K * e + e − branching fractions in two dilepton invariant mass squared bins, which deviate from the Standard Model predictions by approximately 2.5σ. These new measurements strengthen the hint of lepton flavor universality breaking which was observed earlier in B → K + − decays. In this work we explore the possibility of explaining these anomalies within the framework of R-parity violating interactions. In this framework, b → s + − transitions are generated through tree and one loop diagrams involving exchange of down-type right-handed squarks, up-type left-handed squarks and left-handed sneutrinos. We find that the tree level contributions are not enough to explain the anomalies, but at one loop, simultaneous explanation of the deviations in B → K * + − and B → K + − is feasible for a parameter space of the Yukawa couplings that is consistent with the bounds coming from B → K ( * ) νν and D 0 → µ + µ − decays and Bs −Bs mixing.

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Decoupling of heavy sneutrinos in low-scale seesaw models

Cited by 16 publications

References 82 publications

Erratum: Enhancingli→3ljwith theZ
Hirsch¹,
Staub²,
Vicente³
2015
Phys. Rev. D
Self Cite
13
0
17
0
View full text Add to dashboard Cite

Erratum: Enhancingli→3ljwith theZ
Hirsch¹,
Staub²,
Vicente³
2015
Phys. Rev. D
Self Cite
13
0
17
0
View full text Add to dashboard Cite

Lepton flavor violation in low-scale seesaw models: SUSY and non-SUSY contributions

Scrutinizing R -parity violating interactions in light of RK(*) data

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Decoupling of heavy sneutrinos in low-scale seesaw models

Cited by 16 publications

References 82 publications

Erratum: Enhancingli→3ljwith theZHirsch1, Staub2, Vicente3 2015Phys. Rev. DSelf Cite130170View full textAdd to dashboardCite

Erratum: Enhancingli→3ljwith theZHirsch1, Staub2, Vicente3 2015Phys. Rev. DSelf Cite130170View full textAdd to dashboardCite

Lepton flavor violation in low-scale seesaw models: SUSY and non-SUSY contributions

Scrutinizing R -parity violating interactions in light of RK(*) data

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Erratum: Enhancingli→3ljwith theZ
Hirsch¹,
Staub²,
Vicente³
2015
Phys. Rev. D
Self Cite
13
0
17
0
View full text Add to dashboard Cite

Erratum: Enhancingli→3ljwith theZ
Hirsch¹,
Staub²,
Vicente³
2015
Phys. Rev. D
Self Cite
13
0
17
0
View full text Add to dashboard Cite