Probing lepton flavor violation at the 13 TeV LHC

Primulando, Reinard; Uttayarat, Patipan

doi:10.1007/jhep05(2017)055

Cited by 23 publications

(31 citation statements)

References 42 publications

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“…There are bounds stemming from the kaon mass difference system which can rule out the charged scalar mass up to 100 − 500 GeV [366]. There are also limits based on searches for a heavy Higgs in this model which, depending on the Yukawa couplings, may excluded heavy Higgs masses up to 200 GeV [367]. All these limits are not very restrictive and do not have an impact on the possibility of observing a signal in µ → eγ in the near future.…”

Section: Existing Limitsmentioning

confidence: 98%

A call for new physics: The muon anomalous magnetic moment and lepton flavor violation

2018

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We review how the muon anomalous magnetic moment (g − 2) and the quest for lepton flavor violation are intimately correlated. Indeed the decay µ → eγ is induced by the same amplitude for different choices of in-and outgoing leptons. In this work, we try to address some intriguing questions such as:Which hierarchy in the charged lepton sector one should have in order to reconcile possible signals coming simultaneously from g − 2 and lepton flavor violation?What can we learn if the g − 2 anomaly is confirmed by the upcoming flagship experiments at FERMILAB and J-PARC, and no signal is seen in the decay µ → eγ in the foreseeable future? On the other hand, if the µ → eγ decay is seen in the upcoming years, do we need to necessarily observe a signal also in g − 2?.In this attempt, we generally study the correlation between these observables in a detailed analysis of simplified models. We derive master integrals and

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Section: Existing Limitsmentioning

confidence: 98%

A call for new physics: The muon anomalous magnetic moment and lepton flavor violation

2018

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“…We are inspired in the analysis carried out by the CMS Collaboration in Ref. [23], ATLAS Collaboration in [46], and the work of the authors of [47]. The ATLAS and CMS Collaborations considered the two following tau decay channels: electron decay τ e μ and the hadron decay τ h μ.…”

Section: Search For Lfv Flavon Decays At the Lhc And A Future 100 mentioning

confidence: 99%

Searching for lepton flavor violating flavon decays at hadron colliders

et al. 2018

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The search for flavons with a mass of Oð1Þ TeV at current and future colliders might probe low-scale flavor models. We are interested in the simplest model that invokes the Froggatt-Nielsen mechanism with an Abelian flavor symmetry, which includes a Higgs doublet and a Froggatt-Nielsen complex singlet. Assuming a CP conserving scalar potential, there are a CP-even H F and a CP-odd A F flavons with lepton flavor violating (LFV) couplings. The former can mix with the standard-model-like Higgs boson, thereby inducing tree-level LFV Higgs interactions that may be at the reach of the LHC. We study the constraints on the parameter space of the model from low-energy LFV processes, which are then used to evaluate the flavon decay widths and the gg → ϕ → τμ (ϕ ¼ H F ; A F ) production cross section at hadron colliders. After imposing several kinematic cuts to reduce the standard model main background, we find that for m H F about 200-350 GeV, the decay H F → τμ might be at the reach of the LHC for a luminosity in the range 1-3 ab −1 , however, a luminosity of the order of 10 ab −1 would be required to detect the A F → τμ decay. On the other hand, a future 100 TeV pp collider could probe masses as high as Oð10Þ TeV if it reaches an integrated luminosity of at least 20 ab −1 . Therefore, the 100 TeV Collider could work as a flavon factory.

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“…The partial decay widths of the heavy neutral scalars are also given in Ref. [5]. We note here that in the absence of the Φ 2 Yukawa couplings (the Y 's), the H would 2 The presence of any of the Y U 's or Y D 's would enhance the H production.…”

Section: B Productions and Decays Of Heavy Scalarsmentioning

confidence: 69%

“…Thus one would expect the mixing angle α to be small, see Eq. (5). The small mixing angle has a significant impact on the production of the heavy scalars as we will now discuss.…”

Section: B Productions and Decays Of Heavy Scalarsmentioning

confidence: 91%

Collider constraints on lepton flavor violation in the 2HDM

2020

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In light of the recent CMS analysis on lepton flavor violating (LFV) heavy Higgs searches and updated bounds on various search channels involving neutral and charged scalars, we provide the updated constraints on the Type-III Two-Higgs-Doublet-Model (2HDM) with a τ − µ LFV. In doing so, we first extend the CMS analysis to cover the mass region below 200 GeV by recasting their data. After obtaining the bounds on the heavy Higgs production in the mass range between 130 GeV and 450 GeV, we analyze the parameter space of the Type-III 2HDM with various scenarios of mass spectrum and heavy Higgs production strengths. We found that in most scenarios, searching for the heavy Higgs in the mass range lower than 2mW is very important in constraining the parameter space of the Type-III 2HDM. Hence, we suggest for the future analysis that the search window for the LFV heavy Higgs be extended to the lower mass region. * rprimulando@unpar.ac.id † julio@lipi.go.id ‡ patipan@g.swu.ac.th 1 In other variants of the 2HDM without tree-level flavor violation, there is a discrete symmetry making only one Higgs doublet couple to one type of fermions [8]. These variants, commonly called Type-I or Type-II 2HDM, are extensively studied.

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Probing lepton flavor violation at the 13 TeV LHC

Cited by 23 publications

References 42 publications

A call for new physics: The muon anomalous magnetic moment and lepton flavor violation

A call for new physics: The muon anomalous magnetic moment and lepton flavor violation

Searching for lepton flavor violating flavon decays at hadron colliders

Collider constraints on lepton flavor violation in the 2HDM

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