<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>H</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mo>ℓ</mml:mo><mml:msup><mml:mrow><mml:mo>ℓ</mml:mo></mml:mrow><mml:mrow><mml:mo>′</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>in the simplest little Higgs model

Lami, Andrea; Roig, Pablo

doi:10.1103/physrevd.94.056001

Cited by 28 publications

(16 citation statements)

References 64 publications

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“…Many extensions of the SM do not preserve lepton-flavor number, and the corresponding parameters have been tightly restricted by the negative outcomes of the various searches conducted so far in the decays of kaons, B mesons, and charged leptons, among others [1][2][3][4][5][6][7][8][9][10][11]. The most common examples of NP exhibiting LFV include leptoquarks [12][13][14][15][16][17][18][19][20][21][22], heavy neutrinos [23][24][25][26][27][28][29][30][31][32], gauged U(1) extensions of the SM with their associated Z gauge bosons [33][34][35][36][37][38][39][40][41], and multi-Higgs models [42][43][44][45][46][47]…”

mentioning

confidence: 99%

Charged-lepton-flavor violation in |ΔS| = 1 hyperon decays

He¹,

Tandean²,

Valencia³

2019

J. High Energ. Phys.

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Studies of lepton-flavor violation in strangeness-changing (|∆S| = 1) transitions have a long tradition in the kaon sector where they provide some of the strongest limits on physics beyond the standard model. Recent hints of violation of lepton-flavor universality in B-meson decays have revived interest in lepton-flavor violation as the two phenomena appear simultaneously in many extensions of the standard model. At the same time, the LHCb experiment has produced new results for the hyperon process Σ + → pµ + µ − and may be in a position to study other rare hyperon decay modes. With this in mind, we investigate |∆S| = 1 hyperon decays into different-flavor lepton pairs e ± µ ∓ in a model-independent manner and contrast the coverage of parameter space that can be achieved with what is known from kaon modes. We include a comparison with selected two-body leptonic decays of charged mesons, with K → πνν modes, with µ → e conversion, and with lepton-flavor violating decays of other neutral mesons, all of which constrain the same parameter space in a complementary way.

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mentioning

confidence: 99%

Charged-lepton-flavor violation in |ΔS| = 1 hyperon decays

He¹,

Tandean²,

Valencia³

2019

J. High Energ. Phys.

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“…[13,14], with subsequent analyses on the detectability of the signal appearing soon after [15,16]. This motivated a plethora of calculations in the framework of several SM extensions, such as theories with massive neutrinos, supersymmetric theories, etc., [11,[17][18][19][20][21][22]. After the Higgs boson discovery, the decay h → τμ offers a great opportunity to search for NP at the LHC.…”

Section: Introductionmentioning

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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“…[1,2]. Many other models can incorporate the LFV decay, for example, the minimal supersymmetric Standard Model and its extension [7,8], models with an electroweak triplet [9,10], models with vector-like heavy lepton [11,12], composite Higgs model [13], and the Little Higgs models [14,15]. As has already been mentioned, the LFV h → τ µ has been searched for at the LHC and the branching ratio is tightly constrained.…”

Section: Contentsmentioning

confidence: 99%

Probing lepton flavor violation at the 13 TeV LHC

Primulando

Uttayarat

2017

J. High Energ. Phys.

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We investigate the bounds on tau-mu lepton flavor violation (LFV). Our main focus is on the collider constrains on tau-mu LFV. We use the Type-III Two-Higgs-Doublet-Model (2HDM) as a set up for our study. While the LFV branching fraction of the 125 GeV is well constrained by current LHC searches, the heavier neutral states could have a large branching fraction to tau and muon. We estimate the LHC reach for the 13 TeV center of mass energy with 300 fb −1 luminosity for a neutral boson decaying into a tau and a muon. We identify parts of the LFV parameter space where the searches for heavy scalar and pseudoscalar decaying into a tau and a muon are more sensitive than the similar search for the 125 GeV boson. A Loop functions 30 B Wilson coefficients for τ → µγ 30 C Decay width of τ → µM 32

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H→ℓℓ′in the simplest little Higgs model

Cited by 28 publications

References 64 publications

Charged-lepton-flavor violation in |ΔS| = 1 hyperon decays

Charged-lepton-flavor violation in |ΔS| = 1 hyperon decays

Searching for lepton flavor violating flavon decays at hadron colliders

Probing lepton flavor violation at the 13 TeV LHC

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